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Table of Contents

Introduction

This documentation provides a general tour to DAOS management commands (DMG) for daos_admin, and DAOS tools for daos_client users. Including pool and container create, list, query and destroy on a 2 hosts DAOS server and 1 host DAOS client environment. Example of DMG and DAOS commands option are provided. Some frequent common errors user might see and workaround are provided. Setting up of DAOS dfuse mount point and run traffic with dfuse fio and mpirun mdtest. Runs with 4 hosts DAOS server and example of DAOS rebuild and outputs are provided.

Requirements

Set environment variables for list of servers, client and admin node.

export SERVER_NODES=node-1,node-2
export ADMIN_NODE=node-3
export CLIENT_NODE=node-3
export ALL_NODES=$SERVER_NODES,$CLIENT_NODE

Set-Up

Please reference to DAOS server(s) and client(s) DAOS Set-Up for RPM installation, daos server/agent/admin configuration yml files, certificates generation, and bring-up daos servers and clients.

DAOS management tool (dmg) usage for daos_admin

dmg tool usage

# DAOS management tool full path /usr/bin/dmg 
$ dmg --help
Usage:
  dmg [OPTIONS] <command>

Application Options:
      --allow-proxy   Allow proxy configuration via environment
  -l, --host-list=    comma separated list of addresses <ipv4addr/hostname>
  -i, --insecure      have dmg attempt to connect without certificates
  -d, --debug         enable debug output
  -j, --json          Enable JSON output
  -J, --json-logging  Enable JSON-formatted log output
  -o, --config-path=  Client config file path

Help Options:
  -h, --help          Show this help message

Available commands:
  config     Perform tasks related to configuration of hardware remote servers (aliases: co)
  cont       Perform tasks related to DAOS containers (aliases: c)
  network    Perform tasks related to network devices attached to remote servers (aliases: n)
  pool       Perform tasks related to DAOS pools (aliases: p)
  storage    Perform tasks related to storage attached to remote servers (aliases: st)
  system     Perform distributed tasks related to DAOS system (aliases: sy)
  telemetry  Perform telemetry operations
  version    Print dmg version

dmg system query

$ dmg system query   +--verbose
Rank  State  
----  -----  
0     Joined

dmg system query with debug

$ dmg system query -d
DEBUG 16:43:20.281976 main.go:217: debug output enabled
DEBUG 16:43:20.282999 main.go:244: control config loaded from /etc/daos/daos_control.yml
DEBUG 16:43:20.285567 system.go:406: DAOS system query request: &{unaryRequest:{request:{deadline:{wall:0 ext:0 loc:<nil>} Sys: HostList:[]} rpc:0xf6b300} msRequest:{} sysRequest:{Ranks:{RWMutex:{w:{state:0 sema:0} writerSem:0 readerSem:0 readerCount:0 readerWait:0} HostSet:{Mutex:{state:0 sema:0} list:0xc00030f280}} Hosts:{Mutex:{state:0 sema:0} list:0xc00030f240}} retryableRequest:{retryTimeout:0 retryInterval:0 retryMaxTries:0 retryTestFn:0xf6b460 retryFn:0xf6b5a0} FailOnUnavailable:false}
DEBUG 16:43:20.285939 rpc.go:209: request hosts: [boro-8:10001]
Rank State  
---- -----  
0    Joined

dmg storage query usage

$ dmg storage query usage
Hosts  SCM-Total SCM-Free SCM-Used NVMe-Total NVMe-Free NVMe-Used 
-----  --------- -------- -------- ---------- --------- --------- 
boro-8 17 GB     17 GB    0 %      0 B        0 B       N/A

dmg pool create

$ dmg pool create --size=10GB
Creating DAOS pool with automatic storage allocation: 10 GB NVMe + 6.00% SCM
Pool created with 100.00% SCM/NVMe ratio
-----------------------------------------
  UUID          : 5f362dc2-6154-44c7-8348-9de6f0a3d5d1
  Service Ranks : 0                                   
  Storage Ranks : 0                                   
  Total Size    : 10 GB                               
  SCM           : 10 GB (10 GB / rank)                
  NVMe          : 0 B (0 B / rank)                    

$ dmg storage query usage
Hosts  SCM-Total SCM-Free SCM-Used NVMe-Total NVMe-Free NVMe-Used 
-----  --------- -------- -------- ---------- --------- --------- 
boro-8 17 GB     6.0 GB   65 %     0 B        0 B       N/A

dmg pool list

$ dmg pool list
Pool UUID                            Svc Replicas 
---------                            ------------ 
5f362dc2-6154-44c7-8348-9de6f0a3d5d1 0

dmg pool destroy

$ dmg pool destroy --pool=$DAOS_POOL
Pool-destroy command succeeded
$ dmg pool list
no pools in system
$ dmg storage query usage
Hosts  SCM-Total SCM-Free SCM-Used NVMe-Total NVMe-Free NVMe-Used 
-----  --------- -------- -------- ---------- --------- --------- 
boro-8 17 GB     17 GB    0 %      0 B        0 B       N/A

dmg pool query

$ dmg pool query --pool=$DAOS_POOL
Pool 528f4710-7eb8-4850-b6aa-09e4b3c8f532, ntarget=8, disabled=0, leader=0, version=1
Pool space info:
- Target(VOS) count:8
- SCM:
  Total size: 10 GB
  Free: 10 GB, min:1.2 GB, max:1.2 GB, mean:1.2 GB
- NVMe:
  Total size: 0 B
  Free: 0 B, min:0 B, max:0 B, mean:0 B
Rebuild idle, 0 objs, 0 recs

dmg pool create for specified user and group

# Create a 1GB pool for user:user_1 group:admin_group1
$ dmg pool create --group=admin_group1 --user=user_1 --size=1G
Creating DAOS pool with automatic storage allocation: 1.0 GB NVMe + 6.00% SCM
Pool created with 100.00% SCM/NVMe ratio
-----------------------------------------
  UUID          : 64efd827-6bcb-434b-ab78-2010984539ff
  Service Ranks : 0                                   
  Storage Ranks : 0                                   
  Total Size    : 1.0 GB                              
  SCM           : 1.0 GB (1.0 GB / rank)              
  NVMe          : 0 B (0 B / rank)

dmg pool create with security setting

# Create a pool with access-control via a access-list test file
$ dmg pool create --size=1G --acl-file=/tmp/acl_test.txt
Creating DAOS pool with automatic storage allocation: 1.0 GB NVMe + 6.00% SCM
Pool created with 100.00% SCM/NVMe ratio
-----------------------------------------
  UUID          : 4533f724-7234-4c70-946c-b7a53d7d0ddf
  Service Ranks : 0                                   
  Storage Ranks : 0                                   
  Total Size    : 1.0 GB                              
  SCM           : 1.0 GB (1.0 GB / rank)              
  NVMe          : 0 B (0 B / rank)      

# Example of access entries on /tmp/acl_test.txt
#  pool OWNER:       read-write permission 
#  pool owner GROUP: read-write permission
#  test_user1:       write-only permission
#  test_user2:       read-only permission
#  test_group1:      write-only permission
#  test_group2:      read-only permission
#  EVERYONE else:    no permission
A::OWNER@:rw 
A:G:GROUP@:rw
A::test_user1@:w
A::test_user2@:r
A:G:test_group1@:w 
A:G:test_group2@:r
A::EVERYONE@:

# Get pool security acl
$ dmg pool get-acl --pool=$DAOS_POOL
# Entries:
A::OWNER@:rw
A::test_user1@:w
A::test_user2@:r
A:G:GROUP@:rw
A:G:test_group1@:w
A:G:test_group2@:r
A::EVERYONE@:

# Update pool access entry for test_group1 to no-permission 
dmg pool update-acl -e A:G:test_group1@: --pool=$DAOS_POOL

# Update pool access entry for new user test_user3 with rw permission
dmg pool update-acl -e A::test_user3@:rw --pool=$DAOS_POOL

# Get pool security acl after update-acl
$ dmg pool get-acl --pool=$DAOS_POOL
# Entries:
A::OWNER@:rw
A::test_user1@:w
A::test_user2@:r 
A::test_user3@:rw 
A:G:GROUP@:rw
A:G:test_group1@:
A:G:test_group2@:r
A::EVERYONE@:

DAOS tool (daos) usage for daos_client

$ /usr/bin/daos help
daos command (v1.2.2), libdaos 1.2.0
usage: daos RESOURCE COMMAND [OPTIONS]
resources:
          pool             pool
          container (cont) container
          filesystem (fs)  copy to and from a POSIX filesystem
          object (obj)     object
          shell            Interactive obj ctl shell for DAOS
          version          print command version
          help             print this message and exit

use 'daos help RESOURCE' for resource specifics

$ daos help cont
daos command (v1.2.2), libdaos 1.2.0

container (cont) commands:
          create           create a container
          clone            clone a container
          destroy          destroy a container
          list-objects     list all objects in container
          list-obj
          query            query a container
          get-prop         get all container's properties
          set-prop         set container's properties
          get-acl          get a container's ACL
          overwrite-acl    replace a container's ACL
          update-acl       add/modify entries in a container's ACL
          delete-acl       delete an entry from a container's ACL
          set-owner        change the user and/or group that own a container
          stat             get container statistics
          check            check objects consistency in container
          list-attrs       list container user-defined attributes
          del-attr         delete container user-defined attribute
          get-attr         get container user-defined attribute
          set-attr         set container user-defined attribute
          create-snap      create container snapshot (optional name)
                           at most recent committed epoch
          list-snaps       list container snapshots taken
          destroy-snap     destroy container snapshots
                           by name, epoch or range
          rollback         roll back container to specified snapshot

use 'daos help cont|container COMMAND' for command specific options

daos container create

$ dmg pool create --size=10G
Creating DAOS pool with automatic storage allocation: 10 GB NVMe + 6.00% SCM
Pool created with 100.00% SCM/NVMe ratio
-----------------------------------------
  UUID          : 528f4710-7eb8-4850-b6aa-09e4b3c8f532
  Service Ranks : 0                                   
  Storage Ranks : 0                                   
  Total Size    : 10 GB                               
  SCM           : 10 GB (10 GB / rank)                
  NVMe          : 0 B (0 B / rank)                    

$ daos cont create --pool=$DAOS_POOL
Successfully created container bfef23e9-bbfa-4743-a95c-144c44078f16

daos container list

$ daos pool list-cont --pool=$DAOS_POOL
bfef23e9-bbfa-4743-a95c-144c44078f16

daos container destroy

$ daos cont destroy --pool=$DAOS_POOL --cont=$DAOS_CONT
Successfully destroyed container bfef23e9-bbfa-4743-a95c-144c44078f16

daos container create

# Create a HDF5 container for oclass RP_3G1 traffic and redundancy_factor = 2
# By default: type = POSIX
#             oclass = SX
#             rf:0 (redundancy_factor)     
$ daos cont create --pool=$DAOS_POOL --type=HDF5 --oclass=RP_3G1 --properties=rf:2
Successfully created container bc4fe707-7470-4b7d-83bf-face75cc98fc

daos container query

$ daos cont query  --pool=$DAOS_POOL --cont=$DAOS_CONT
Pool UUID:      528f4710-7eb8-4850-b6aa-09e4b3c8f532
Container UUID: bc4fe707-7470-4b7d-83bf-face75cc98fc
Number of snapshots: 0
Latest Persistent Snapshot: 0
Highest Aggregated Epoch: 172477977191481344
Container redundancy factor: 2

daos container snapshot

$ daos help cont snapshot
daos command (v1.2.2), libdaos 1.2.0

container (cont) commands:
          create           create a container
          clone            clone a container
          destroy          destroy a container
          list-objects     list all objects in container
          list-obj
          query            query a container
          get-prop         get all container's properties
          set-prop         set container's properties
          get-acl          get a container's ACL
          overwrite-acl    replace a container's ACL
          update-acl       add/modify entries in a container's ACL
          delete-acl       delete an entry from a container's ACL
          set-owner        change the user and/or group that own a container
          stat             get container statistics
          check            check objects consistency in container
          list-attrs       list container user-defined attributes
          del-attr         delete container user-defined attribute
          get-attr         get container user-defined attribute
          set-attr         set container user-defined attribute
          create-snap      create container snapshot (optional name)
                           at most recent committed epoch
          list-snaps       list container snapshots taken
          destroy-snap     destroy container snapshots
                           by name, epoch or range
          rollback         roll back container to specified snapshot

use 'daos help cont|container COMMAND' for command specific options

daos container snapshot create/list/destroy

$ daos cont create-snap --pool=$DAOS_POOL --cont=$DAOS_CONT
snapshot/epoch 172646116775952384 has been created

$ daos container list-snaps --pool=$DAOS_POOL --cont=$DAOS_CONT
Container's snapshots :
172478166024060928 
172646116775952384 

$ daos container destroy-snap --pool=$DAOS_POOL --cont=$DAOS_CONT --epc=172646116775952384

$ daos container list-snaps --pool=$DAOS_POOL --cont=$DAOS_CONT
Container's snapshots :
172478166024060928

Frequent errors user might see and workaround

use dmg command without daos_admin priviledge

$ dmg system query
ERROR: dmg: Unable to load Certificate Data: could not load cert: stat /etc/daos/certs/admin.crt: no such file or directory

# Workaround
# 1. Make sure the admin-host /etc/daos/daos_control.yml is correctly configured. 
#    including:
#      hostlist: <daos_server_lists>
#      port: <port_num>
#      transport_config:
#        allow_insecure: <true/false>
#        ca_cert: /etc/daos/certs/daosCA.crt
#        cert: /etc/daos/certs/admin.crt
#        key: /etc/daos/certs/admin.key
#
# 2. Make sure the admin-host allow_insecure mode match with the servers'.

use daos command before daos_agent started

$ daos cont create --pool=$DAOS_POOL
daos ERR  src/common/drpc.c:217 unixcomm_connect() Failed to connect to /var/run/daos_agent/daos_agent.sock, errno=2(No such file or directory)
mgmt ERR  src/mgmt/cli_mgmt.c:222 get_attach_info() failed to connect to /var/run/daos_agent/daos_agent.sock DER_MISC(-1025): 'Miscellaneous error'
failed to initialize daos: Miscellaneous error (-1025)

# Work around to check for daos_agent certification and start daos_agent
$ #check for /etc/daos/certs/daosCA.crt, agent.crt and agent.key
$ sudo systemctl enable daos_agent.service
$ sudo systemctl start daos_agent.service

use daos command with invalid or wrong parameters

# Lack of providing daos pool_uuid
$ daos pool list-cont
pool UUID required
rc: 2
daos command (v1.2.2), libdaos 1.2.0
usage: daos RESOURCE COMMAND [OPTIONS]
resources:
          pool             pool
          container (cont) container
          filesystem (fs)  copy to and from a POSIX filesystem
          object (obj)     object
          shell            Interactive obj ctl shell for DAOS
          version          print command version
          help             print this message and exit
use 'daos help RESOURCE' for resource specifics

# Invalid sub-command cont-list
$ daos pool cont-list --pool=$DAOS_POOL
invalid pool command: cont-list
error parsing command line arguments
daos command (v1.2.2), libdaos 1.2.0
usage: daos RESOURCE COMMAND [OPTIONS]
resources:
          pool             pool
          container (cont) container
          filesystem (fs)  copy to and from a POSIX filesystem
          object (obj)     object
          shell            Interactive obj ctl shell for DAOS
          version          print command version
          help             print this message and exit
use 'daos help RESOURCE' for resource specifics

# Working daos pool command
$ daos pool list-cont --pool=$DAOS_POOL
bc4fe707-7470-4b7d-83bf-face75cc98fc

dmg pool create failed due to no space

$ dmg pool create --size=50G
Creating DAOS pool with automatic storage allocation: 50 GB NVMe + 6.00% SCM
ERROR: dmg: pool create failed: DER_NOSPACE(-1007): No space on storage target

# Workaround: dmg storage query scan to find current available storage
$ dmg storage query usage
Hosts  SCM-Total SCM-Free SCM-Used NVMe-Total NVMe-Free NVMe-Used 
-----  --------- -------- -------- ---------- --------- --------- 
boro-8 17 GB     6.0 GB   65 %     0 B        0 B       N/A       

$ dmg pool create --size=2G
Creating DAOS pool with automatic storage allocation: 2.0 GB NVMe + 6.00% SCM
Pool created with 100.00% SCM/NVMe ratio
-----------------------------------------
  UUID          : b5ce2954-3f3e-4519-be04-ea298d776132
  Service Ranks : 0                                   
  Storage Ranks : 0                                   
  Total Size    : 2.0 GB                              
  SCM           : 2.0 GB (2.0 GB / rank)              
  NVMe          : 0 B (0 B / rank)                    

$ dmg storage query usage
Hosts  SCM-Total SCM-Free SCM-Used NVMe-Total NVMe-Free NVMe-Used 
-----  --------- -------- -------- ---------- --------- --------- 
boro-8 17 GB     2.9 GB   83 %     0 B        0 B       N/A

Test with dfuse fio

required rpm

$ sudo yum install -y fio
or
$ sudo yum install -y daos-tests

run fio

$ daos cont create --pool=$DAOS_POOL --type=POSIX
$ daos cont query --pool=$DAOS_POOL --cont=$DAOS_CONT
Pool UUID: f688f2ad-76ae-4368-8d1b-5697ca016a43
Container UUID: bcc5c793-60dc-4ec1-8bab-9d63ea18e794
Number of snapshots: 0
Latest Persistent Snapshot: 0
Highest Aggregated Epoch: 0
Container redundancy factor: 0
$ /usr/bin/mkdir /tmp/daos_test1
$ /usr/bin/touch /tmp/daos_test1/testfile
$ /usr/bin/df -h -t fuse.daos
df: no file systems processed
$ /usr/bin/dfuse --m=/tmp/daos_test1 --pool=<pool-uuid> --cont=<cont-uuid>
$ /usr/bin/df -h -t fuse.daos
Filesystem Size Used Avail Use% Mounted on
dfuse 954M 144K 954M 1% /tmp/daos_test1
$ /usr/bin/fio --name=random-write --ioengine=pvsync --rw=randwrite --bs=4k --size=128M --nrfiles=4 --directory=/tmp/daos_test1 --numjobs=8 --iodepth=16 --runtime=60 --time_based --direct=1 --buffered=0 --randrepeat=0 --norandommap --refill_buffers --group_reportingrandom-write: (g=0): rw=randwrite, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=pvsync, iodepth=16
...
fio-3.7
Starting 8 processes
random-write: Laying out IO files (4 files / total 128MiB)
random-write: Laying out IO files (4 files / total 128MiB)
random-write: Laying out IO files (4 files / total 128MiB)
random-write: Laying out IO files (4 files / total 128MiB)
random-write: Laying out IO files (4 files / total 128MiB)
random-write: Laying out IO files (4 files / total 128MiB)
random-write: Laying out IO files (4 files / total 128MiB)
random-write: Laying out IO files (4 files / total 128MiB)
write: IOPS=19.9k, BW=77.9MiB/s (81.7MB/s)(731MiB/9379msec)
clat (usec): min=224, max=6539, avg=399.16, stdev=70.52
lat (usec): min=224, max=6539, avg=399.19, stdev=70.52
clat percentiles (usec):
...
bw ( KiB/s): min= 9368, max=10096, per=12.50%, avg=9972.06, stdev=128.28, samples=144
iops : min= 2342, max= 2524, avg=2493.01, stdev=32.07, samples=144
lat (usec) : 250=0.01%, 500=96.81%, 750=3.17%, 1000=0.01%
lat (msec) : 10=0.01%
cpu : usr=0.43%, sys=1.05%, ctx=187242, majf=0, minf=488
IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
complete : 0=0.1%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
issued rwts: total=0,187022,0,0 short=0,0,0,0 dropped=0,0,0,0
latency : target=0, window=0, percentile=100.00%, depth=16
Run status group 0 (all jobs):
WRITE: bw=77.9MiB/s (81.7MB/s), 77.9MiB/s-77.9MiB/s (81.7MB/s-81.7MB/s), io=731MiB (766MB), run=9379-9379msec
$ ll /tmp/daos_test1
total 1048396
rw-rr- 1 user1 user1 33554432 Apr 21 23:28 random-write.0.0
rw-rr- 1 user1 user1 33546240 Apr 21 23:28 random-write.0.1
rw-rr- 1 user1 user1 33542144 Apr 21 23:28 random-write.0.2
rw-rr- 1 user1 user1 33554432 Apr 21 23:28 random-write.0.3
rw-rr- 1 user1 user1 33554432 Apr 21 23:28 random-write.1.0
rw-rr- 1 user1 user1 33554432 Apr 21 23:28 random-write.1.1
rw-rr- 1 user1 user1 33554432 Apr 21 23:28 random-write.1.2
rw-rr- 1 user1 user1 33554432 Apr 21 23:28 random-write.1.3
rw-rr- 1 user1 user1 33554432 Apr 21 23:28 random-write.2.0
rw-rr- 1 user1 user1 33554432 Apr 21 23:28 random-write.2.1
rw-rr- 1 user1 user1 33554432 Apr 21 23:28 random-write.2.2
rw-rr- 1 user1 user1 33554432 Apr 21 23:28 random-write.2.3
rw-rr- 1 user1 user1 33542144 Apr 21 23:28 random-write.3.0
rw-rr- 1 user1 user1 33550336 Apr 21 23:28 random-write.3.1
rw-rr- 1 user1 user1 33550336 Apr 21 23:28 random-write.3.2
rw-rr- 1 user1 user1 33542144 Apr 21 23:28 random-write.3.3
rw-rr- 1 user1 user1 33554432 Apr 21 23:28 random-write.4.0
rw-rr- 1 user1 user1 33525760 Apr 21 23:28 random-write.4.1
rw-rr- 1 user1 user1 33554432 Apr 21 23:28 random-write.4.2
rw-rr- 1 user1 user1 33550336 Apr 21 23:28 random-write.4.3
rw-rr- 1 user1 user1 33542144 Apr 21 23:28 random-write.5.0
rw-rr- 1 user1 user1 33546240 Apr 21 23:28 random-write.5.1
rw-rr- 1 user1 user1 33554432 Apr 21 23:28 random-write.5.2
rw-rr- 1 user1 user1 33554432 Apr 21 23:28 random-write.5.3
rw-rr- 1 user1 user1 33554432 Apr 21 23:28 random-write.6.0
rw-rr- 1 user1 user1 33550336 Apr 21 23:28 random-write.6.1
rw-rr- 1 user1 user1 33550336 Apr 21 23:28 random-write.6.2
rw-rr- 1 user1 user1 33554432 Apr 21 23:28 random-write.6.3
rw-rr- 1 user1 user1 33525760 Apr 21 23:28 random-write.7.0
rw-rr- 1 user1 user1 33554432 Apr 21 23:28 random-write.7.1
rw-rr- 1 user1 user1 33525760 Apr 21 23:28 random-write.7.2
rw-rr- 1 user1 user1 33542144 Apr 21 23:28 random-write.7.3

unmount

$ /usr/bin/fusermount -u /tmp/daos_test1/






Test with Mpirun

required rpms

$ sudo yum install -y mpich
$ sudo yum install -y mdtest
$ sudo yum install -y Lmod
$ sudo module load mpi/mpich-x86_64
$ /usr/bin/touch /tmp/daos_test1/testfile

run mpirun ior 

$ /usr/lib64/mpich/bin/mpirun -host <host1> -np 30 ior -a POSIX -b 26214400 -v -w -k -i 1 -o /tmp/daos_test1/testfile -t 25M
IOR-3.4.0+dev: MPI Coordinated Test of Parallel I/O
Began : Fri Apr 16 18:07:56 2021
Command line : ior -a POSIX -b 26214400 -v -w -k -i 1 -o /tmp/daos_test1/testfile -t 25M
Machine : Linux boro-8.boro.hpdd.intel.com
Start time skew across all tasks: 0.00 sec
TestID : 0
StartTime : Fri Apr 16 18:07:56 2021
Path : /tmp/daos_test1/testfile
FS : 3.8 GiB Used FS: 1.1% Inodes: 0.2 Mi Used Inodes: 0.1%
Participating tasks : 30
Options:
api : POSIX
apiVersion :
test filename : /tmp/daos_test1/testfile
access : single-shared-file
type : independent
segments : 1
ordering in a file : sequential
ordering inter file : no tasks offsets
nodes : 1
tasks : 30
clients per node : 30
repetitions : 1
xfersize : 25 MiB
blocksize : 25 MiB
aggregate filesize : 750 MiB
verbose : 1
Results:
access bw(MiB/s) IOPS Latency(s) block(KiB) xfer(KiB) open(s) wr/rd(s) close(s) total(s) iter
------ --------- ---- ---------- ---------- --------- -------- -------- -------- -------- ----
Commencing write performance test: Fri Apr 16 18:07:56 2021
write 1499.68 59.99 0.480781 25600 25600 0.300237 0.500064 0.483573 0.500107 0
Max Write: 1499.68 MiB/sec (1572.53 MB/sec)
Summary of all tests:
Operation Max(MiB) Min(MiB) Mean(MiB) StdDev Max(OPs) Min(OPs) Mean(OPs) StdDev Mean(s) Stonewall(s) Stonewall(MiB) Test# #Tasks tPN reps fPP reord reordoff reordrand seed segcnt blksiz xsize aggs(MiB) API RefNum
write 1499.68 1499.68 1499.68 0.00 59.99 59.99 59.99 0.00 0.50011 NA NA 0 30 30 1 0 0 1 0 0 1 26214400 26214400 750.0 POSIX 0
Finished : Fri Apr 16 18:07:57 2021


Mpirun mdtest
$ /usr/lib64/mpich/bin/mpirun -host <host1> -np 30 mdtest -a DFS -z 0 -F -C -i 1 -n 1667 -e 4096 -d / -w 4096 --dfs.chunk_size 1048576 --dfs.cont <container.uuid> --dfs.destroy --dfs.dir_oclass RP_3G1 --dfs.group daos_server --dfs.oclass RP_3G1 --dfs.pool <pool_uuid>
– started at 04/16/2021 22:01:55 –
mdtest-3.4.0+dev was launched with 30 total task(s) on 1 node(s)
Command line used: mdtest 'a' 'DFS' '-z' '0' '-F' '-C' '-i' '1' '-n' '1667' '-e' '4096' '-d' '/' '-w' '4096' 'dfs.chunk_size' '1048576' 'dfs.cont' '3e661024-2f1f-4d7a-9cd4-1b05601e0789' 'dfs.destroy' 'dfs.dir_oclass' 'SX' 'dfs.group' 'daos_server' 'dfs.oclass' 'SX' '-dfs.pool' 'd546a7f5-586c-4d8f-aecd-372878df7b97'
WARNING: unable to use realpath() on file system.
Path:
FS: 0.0 GiB Used FS: -nan% Inodes: 0.0 Mi Used Inodes: -nan%
Nodemap: 111111111111111111111111111111
30 tasks, 50010 files
SUMMARY rate: (of 1 iterations)
Operation Max Min Mean Std Dev
--------- — — ---- -------
File creation : 14206.584 14206.334 14206.511 0.072
File stat : 0.000 0.000 0.000 0.000
File read : 0.000 0.000 0.000 0.000
File removal : 0.000 0.000 0.000 0.000
Tree creation : 1869.791 1869.791 1869.791 0.000
Tree removal : 0.000 0.000 0.000 0.000
– finished at 04/16/2021 22:01:58 –

$ /usr/lib64/mpich/bin/mpirun -host <host1> -np 50 mdtest -a DFS -z 0 -F -C -i 1 -n 1667 -e 4096 -d / -w 4096 --dfs.chunk_size 1048576 --dfs.cont 3e661024-2f1f-4d7a-9cd4-1b05601e0789 --dfs.destroy --dfs.dir_oclass SX --dfs.group daos_server --dfs.oclass SX --dfs.pool d546a7f5-586c-4d8f-aecd-372878df7b97
– started at 04/16/2021 22:02:21 –
mdtest-3.4.0+dev was launched with 50 total task(s) on 1 node(s)
Command line used: mdtest 'a' 'DFS' '-z' '0' '-F' '-C' '-i' '1' '-n' '1667' '-e' '4096' '-d' '/' '-w' '4096' 'dfs.chunk_size' '1048576' 'dfs.cont' '3e661024-2f1f-4d7a-9cd4-1b05601e0789' 'dfs.destroy' 'dfs.dir_oclass' 'SX' 'dfs.group' 'daos_server' 'dfs.oclass' 'SX' '-dfs.pool' 'd546a7f5-586c-4d8f-aecd-372878df7b97'
WARNING: unable to use realpath() on file system.
Path:
FS: 0.0 GiB Used FS: -nan% Inodes: 0.0 Mi Used Inodes: -nan%
Nodemap: 11111111111111111111111111111111111111111111111111
50 tasks, 83350 files
SUMMARY rate: (of 1 iterations)
Operation Max Min Mean Std Dev
--------- — — ---- -------
File creation : 13342.303 13342.093 13342.228 0.059
File stat : 0.000 0.000 0.000 0.000
File read : 0.000 0.000 0.000 0.000
File removal : 0.000 0.000 0.000 0.000
Tree creation : 1782.938 1782.938 1782.938 0.000
Tree removal : 0.000 0.000 0.000 0.000
– finished at 04/16/2021 22:02:27 –

Run with 2 DAOS ranks server:

(Agent)
$ sudo systemctl disable daos_agent.service
$ sudo systemctl enable daos_agent.service
Created symlink from /etc/systemd/system/multi-user.target.wants/daos_agent.service to /usr/lib/systemd/system/daos_agent.service.
$ sudo systemctl start daos_agent.service
$ systemctl is-active daos_agent.service
active

(Servers: all server ranks)
$ sudo -n systemctl stop daos_server.service
$ sudo -n systemctl disable daos_server.service
$ sudo -n systemctl enable daos_server.service
$ systemctl is-active daos_server.service
inactive
$ sudo -n systemctl start daos_server.service
$ systemctl is-active daos_server.service
active

$ /usr/bin/dmg -o /etc/daos/daos_control.yml -d storage format
DEBUG 22:53:45.739455 main.go:217: debug output enabled
DEBUG 22:53:45.739622 main.go:244: control config loaded from /etc/daos/daos_control.yml
DEBUG 22:53:45.740018 system.go:406: DAOS system query request: &{unaryRequest:{request:{deadline:{wall:0 ext:0 loc:<nil>} Sy
s: HostList:[]} rpc:0x9bea00} msRequest:{} sysRequest:{Ranks:{RWMutex:{w:{state:0 sema:0} writerSem:0 readerSem:0 readerCount
:0 readerWait:0} HostSet:{Mutex:{state:0 sema:0} list:0xc0002cd280}} Hosts:{Mutex:{state:0 sema:0} list:0xc0002cd240}} retrya
bleRequest:{retryTimeout:0 retryInterval:0 retryMaxTries:0 retryTestFn:0x9beb20 retryFn:0x9bec20} FailOnUnavailable:true}
DEBUG 22:53:45.740144 rpc.go:196: request hosts: [boro-52:10001]
DEBUG 22:53:45.773468 rpc.go:196: request hosts: [boro-8:10001 boro-52:10001]
Format Summary:
  Hosts       SCM Devices NVMe Devices 
  -----       ----------- ------------ 
  boro-[9,52] 1           0            

$ /usr/bin/dmg pool list
no pools in system

$ dmg pool create --size=5G
Creating DAOS pool with automatic storage allocation: 5.0 GB NVMe + 6.00% SCM
Pool created with 100.00% SCM/NVMe ratio
-----------------------------------------
  UUID          : 60ef4faa-72cb-43c1-9162-9236e6bb28f2
  Service Ranks : 0                                   
  Storage Ranks : 0                                   
  Total Size    : 5.0 GB                              
  SCM           : 5.0 GB (5.0 GB / rank)              
  NVMe          : 0 B (0 B / rank)            

$ dmg pool list
Pool UUID                            Svc Replicas 
---------                            ------------ 
60ef4faa-72cb-43c1-9162-9236e6bb28f2 0           

$ daos cont create --pool=$DAOS_POOL --type=POSIX --oclass=SX
Successfully created container e3d57d0e-38a2-48e5-8601-9810214eb946

$ daos pool list-containers --pool=<pool-id>
 e3d57d0e-38a2-48e5-8601-9810214eb946

$ df -h -t fuse.daos
df: no file systems processed

$ dfuse --m=/tmp/daos_test1 --pool=$DAOS_POOL --cont=$DAOS_CONT

$ df -h -t fuse.daos
Filesystem      Size  Used Avail Use% Mounted on
dfuse           9.4G  549K  9.4G   1% /tmp/daos_test1

$ fio --name=random-write --ioengine=pvsync --rw=randwrite --bs=4k --size=128M --nrfiles=4 --directory=/tmp/daos_test1 --numjobs=8 --iodepth=16 --runtime=60 --time_based --direct=1 --buffered=0 --randrepeat=0 --norandommap --refill_buffers --group_reporting
random-write: (g=0): rw=randwrite, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=pvsync, iodepth=16
...
fio-3.7
Starting 8 processes
random-write: Laying out IO files (4 files / total 128MiB)
random-write: Laying out IO files (4 files / total 128MiB)
random-write: Laying out IO files (4 files / total 128MiB)
random-write: Laying out IO files (4 files / total 128MiB)
random-write: Laying out IO files (4 files / total 128MiB)
random-write: Laying out IO files (4 files / total 128MiB)
random-write: Laying out IO files (4 files / total 128MiB)
random-write: Laying out IO files (4 files / total 128MiB)
Jobs: 8 (f=32): [w(8)][98.4%][r=0KiB/s,w=83.0MiB/s][r=0,w=21.5k IOPS][eta 00m:01s]
random-write: (groupid=0, jobs=8): err= 0: pid=17424: Fri Apr 16 23:00:37 2021
  write: IOPS=21.6k, BW=84.4MiB/s (88.5MB/s)(5062MiB/60001msec)
    clat (usec): min=224, max=5982, avg=368.72, stdev=59.60
     lat (usec): min=224, max=5982, avg=368.80, stdev=59.60
    clat percentiles (usec):  
...
bw ( KiB/s): min= 9808, max=10984, per=12.50%, avg=10798.05, stdev=97.24, samples=952
iops : min= 2452, max= 2746, avg=2699.50, stdev=24.31, samples=952
lat (usec) : 250=0.05%, 500=98.19%, 750=1.75%, 1000=0.01%
lat (msec) : 4=0.01%, 10=0.01%
cpu : usr=0.69%, sys=1.51%, ctx=1296165, majf=0, minf=308
IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
issued rwts: total=0,1295786,0,0 short=0,0,0,0 dropped=0,0,0,0
latency : target=0, window=0, percentile=100.00%, depth=16
Run status group 0 (all jobs):
WRITE: bw=84.4MiB/s (88.5MB/s), 84.4MiB/s-84.4MiB/s (88.5MB/s-88.5MB/s), io=5062MiB (5308MB), run=60001-60001msec


$ /usr/lib64/mpich/bin/mpirun -host <client-host> -np 1 ior -a POSIX -b 26214400 -v -w -k -i 1 -o /tmp/daos_test1/testfile -t 25M
IOR-3.4.0+dev: MPI Coordinated Test of Parallel I/O
Began : Fri Apr 16 23:19:56 2021
Command line : ior -a POSIX -b 26214400 -v -w -k -i 1 -o /tmp/daos_test1/testfile -t 25M
Machine : Linux boro-8.boro.hpdd.intel.com
Start time skew across all tasks: 0.00 sec
TestID : 0
StartTime : Fri Apr 16 23:19:56 2021
Path : /tmp/daos_test1/testfile
FS : 3.8 GiB Used FS: 1.1% Inodes: 0.2 Mi Used Inodes: 0.1%
Participating tasks : 1
Options:
api : POSIX
apiVersion :
test filename : /tmp/daos_test1/testfile
access : single-shared-file
type : independent
segments : 1
ordering in a file : sequential
ordering inter file : no tasks offsets
nodes : 1
tasks : 1
clients per node : 1
repetitions : 1
xfersize : 25 MiB
blocksize : 25 MiB
aggregate filesize : 25 MiB
verbose : 1
Results:
access bw(MiB/s) IOPS Latency(s) block(KiB) xfer(KiB) open(s) wr/rd(s) close(s) total(s) iter
------ --------- ---- ---------- ---------- --------- -------- -------- -------- -------- ----
Commencing write performance test: Fri Apr 16 23:19:56 2021
write 1643.22 65.88 0.015179 25600 25600 0.000016 0.015179 0.000007 0.015214 0
Max Write: 1643.22 MiB/sec (1723.04 MB/sec)
Summary of all tests:
Operation Max(MiB) Min(MiB) Mean(MiB) StdDev Max(OPs) Min(OPs) Mean(OPs) StdDev Mean(s) Stonewall(s) Stonewall(MiB) Test# #Tasks tPN reps fPP reord reordoff reordrand seed segcnt blksiz xsize aggs(MiB) API RefNum
write 1643.22 1643.22 1643.22 0.00 65.73 65.73 65.73 0.00 0.01521 NA NA 0 1 1 1 0 0 1 0 0 1 26214400 26214400 25.0 POSIX 0
Finished : Fri Apr 16 23:19:56 2021
$ /usr/lib64/mpich/bin/mpirun -hostfile /tmp/hostfile -np 30 ior -a POSIX -b 26214400 -v -w -k -i 1 -o /tmp/daos_test1/testfile -t 25M
IOR-3.4.0+dev: MPI Coordinated Test of Parallel I/O
Began : Fri Apr 16 23:21:53 2021
Command line : ior -a POSIX -b 26214400 -v -w -k -i 1 -o /tmp/daos_test1/testfile -t 25M
Machine : Linux boro-8.boro.hpdd.intel.com
Start time skew across all tasks: 0.00 sec
TestID : 0
StartTime : Fri Apr 16 23:21:53 2021
Path : /tmp/daos_test1/testfile
FS : 3.8 GiB Used FS: 1.1% Inodes: 0.2 Mi Used Inodes: 0.1%
Participating tasks : 30
Options:
api : POSIX
apiVersion :
test filename : /tmp/daos_test1/testfile
access : single-shared-file
type : independent
segments : 1
ordering in a file : sequential
ordering inter file : no tasks offsets
nodes : 1
tasks : 30
clients per node : 30
repetitions : 1
xfersize : 25 MiB
blocksize : 25 MiB
aggregate filesize : 750 MiB
verbose : 1
Results:
access bw(MiB/s) IOPS Latency(s) block(KiB) xfer(KiB) open(s) wr/rd(s) close(s) total(s) iter
------ --------- ---- ---------- ---------- --------- -------- -------- -------- -------- ----
Commencing write performance test: Fri Apr 16 23:21:53 2021
write 1473.23 58.93 0.471202 25600 25600 0.306893 0.509040 0.488975 0.509086 0
Max Write: 1473.23 MiB/sec (1544.79 MB/sec)
Summary of all tests:
Operation Max(MiB) Min(MiB) Mean(MiB) StdDev Max(OPs) Min(OPs) Mean(OPs) StdDev Mean(s) Stonewall(s) Stonewall(MiB) Test# #Tasks tPN reps fPP reord reordoff reordrand seed segcnt blksiz xsize aggs(MiB) API RefNum
write 1473.23 1473.23 1473.23 0.00 58.93 58.93 58.93 0.00 0.50909 NA NA 0 30 30 1 0 0 1 0 0 1 26214400 26214400 750.0 POSIX 0
Finished : Fri Apr 16 23:21:54 2021

$ dmg pool create --scm-size=5G
Creating DAOS pool with manual per-server storage allocation: 5.0 GB SCM, 0 B NVMe (100.00% ratio)
Pool created with 100.00% SCM/NVMe ratio
-----------------------------------------
UUID : ea834679-ec12-42b5-840b-4d6ec9c4911a
Service Ranks : 0
Total Size : 10 GB
SCM : 10 GB (5.0 GB / rank)
NVMe : 0 B (0 B / rank)

$ dmg pool list
Pool UUID Svc Replicas
--------- ------------
ea834679-ec12-42b5-840b-4d6ec9c4911a 0

$ daos cont create --pool=<pool-id> --type=POSIX --oclass=SX
Successfully created container e204a35f-6846-474f-8dea-6f672a23f19b

$ /usr/lib64/mpich/bin/mpirun -host <host1> -np 30 mdtest -a DFS -z 0 -F -C -i 1 -n 1667 -e 4096 -d / -w 4096 --dfs.chunk_size 1048576 --dfs.cont <cont-id> --dfs.destroy --dfs.dir_oclass SX --dfs.group daos_server --dfs.oclass SX --dfs.pool <pool-id>
– started at 04/17/2021 00:21:20 –
mdtest-3.4.0+dev was launched with 30 total task(s) on 1 node(s)
Command line used: mdtest 'a' 'DFS' '-z' '0' '-F' '-C' '-i' '1' '-n' '1667' '-e' '4096' '-d' '/' '-w' '4096' 'dfs.chunk_size' '1048576' 'dfs.cont' 'e204a35f-6846-474f-8dea-6f672a23f19b' 'dfs.destroy' 'dfs.dir_oclass' 'SX' 'dfs.group' 'daos_server' 'dfs.oclass' 'SX' '-dfs.pool' 'ea834679-ec12-42b5-840b-4d6ec9c4911a'
WARNING: unable to use realpath() on file system.
Path:
FS: 0.0 GiB Used FS: -nan% Inodes: 0.0 Mi Used Inodes: -nan%
Nodemap: 111111111111111111111111111111
30 tasks, 50010 files
SUMMARY rate: (of 1 iterations)
Operation Max Min Mean Std Dev
--------- — — ---- -------
File creation : 21592.376 21592.297 21592.349 0.024
File stat : 0.000 0.000 0.000 0.000
File read : 0.000 0.000 0.000 0.000
File removal : 0.000 0.000 0.000 0.000
Tree creation : 1560.798 1560.798 1560.798 0.000
Tree removal : 0.000 0.000 0.000 0.000
– finished at 04/17/2021 00:21:22 –

Run with 4 DAOS ranks server, rank-rebuild with dfuse_io and mpirun_ior

$ systemctl stop daos_agent.service
$ systemctl disable daos_agent.service
$ systemctl enable daos_agent.service
$ systemctl start daos_agent.service
$ systemctl is-active daos_agent.service
active

$ systemctl stop daos_server.service
$ systemctl disable daos_server.service
$ systemctl enable daos_server.service
$ systemctl start daos_server.service
$ systemctl is-active daos_server.service
active
(on all servers)

$ dmg storage format
Format Summary:
  Hosts             SCM Devices NVMe Devices 
  -----             ----------- ------------ 
  boro-[8,35,52-53] 1           0              

$ dmg system query --verbose
Rank UUID                                 Control Address Fault Domain                 State  Reason 
---- ----                                 --------------- ------------                 -----  ------ 
0    739347b0-7db0-49a3-998f-acad65ff4615 10.7.1.8:10001  /boro-8.boro.hpdd.intel.com  Joined        
1    7273aded-e590-4028-8e85-9ea1ab42d411 10.7.1.52:10001 /boro-52.boro.hpdd.intel.com Joined        
2    d7ea954a-34e4-4671-bcde-047b26626fb4 10.7.1.53:10001 /boro-53.boro.hpdd.intel.com Joined        
3    e2772010-c587-4d33-b5a7-8b5edbc36011 10.7.1.35:10001 /boro-35.boro.hpdd.intel.com Joined        

$ dmg pool create --size=5G
Creating DAOS pool with automatic storage allocation: 5.0 GB NVMe + 6.00% SCM
Pool created with 100.00% SCM/NVMe ratio
-----------------------------------------
  UUID          : 733bee7b-c2af-499e-99dd-313b1ef092a9
  Service Ranks : [1-3]                               
  Storage Ranks : [0-3]                               
  Total Size    : 5.0 GB                              
  SCM           : 5.0 GB (1.3 GB / rank)              
  NVMe          : 0 B (0 B / rank) 

$ dmg pool list
Pool UUID                            Svc Replicas 
---------                            ------------ 
733bee7b-c2af-499e-99dd-313b1ef092a9 [1-3]        

$ daos cont create --pool=$DAOS_POOL --type=POSIX --oclass=RP_3G1 --properties=rf:2
Successfully created container 2649aa0f-3ad7-4943-abf5-4343205a637b

$ daos pool list-cont --pool=$DAOS_POOL
2649aa0f-3ad7-4943-abf5-4343205a637b

$ dmg pool query --pool=733bee7b-c2af-499e-99dd-313b1ef092a9
Pool 733bee7b-c2af-499e-99dd-313b1ef092a9, ntarget=32, disabled=0, leader=2, version=1
Pool space info:
- Target(VOS) count:32
- SCM:
  Total size: 5.0 GB
  Free: 5.0 GB, min:156 MB, max:156 MB, mean:156 MB
- NVMe:
  Total size: 0 B
  Free: 0 B, min:0 B, max:0 B, mean:0 B
Rebuild idle, 0 objs, 0 recs

$ df -h -t fuse.daos
df: no file systems processed

$ mkdir /tmp/daos_test1

$ dfuse --m=/tmp/daos_test1 --pool=$DAOS_POOL --cont=$DAOS_CONT

$ df -h -t fuse.daos
Filesystem Size Used Avail Use% Mounted on
dfuse 19G 1.1M 19G 1% /tmp/daos_test1

$ fio --name=random-write --ioengine=pvsync --rw=randwrite --bs=4k --size=128M --nrfiles=4 --directory=/tmp/daos_test1 --numjobs=8 --iodepth=16 --runtime=60 --time_based --direct=1 --buffered=0 --randrepeat=0 --norandommap --refill_buffers --group_reporting
random-write: (g=0): rw=randwrite, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=pvsync, iodepth=16
...
fio-3.7
Starting 8 processes
random-write: Laying out IO files (4 files / total 128MiB)
random-write: Laying out IO files (4 files / total 128MiB)
random-write: Laying out IO files (4 files / total 128MiB)
random-write: Laying out IO files (4 files / total 128MiB)
random-write: Laying out IO files (4 files / total 128MiB)
random-write: Laying out IO files (4 files / total 128MiB)
random-write: Laying out IO files (4 files / total 128MiB)
random-write: Laying out IO files (4 files / total 128MiB)
Jobs: 8 (f=32): [w(8)][100.0%][r=0KiB/s,w=96.1MiB/s][r=0,w=24.6k IOPS][eta 00m:00s]
random-write: (groupid=0, jobs=8): err= 0: pid=27879: Sat Apr 17 01:12:57 2021
write: IOPS=24.4k, BW=95.3MiB/s (99.9MB/s)(5716MiB/60001msec)
clat (usec): min=220, max=6687, avg=326.19, stdev=55.29
lat (usec): min=220, max=6687, avg=326.28, stdev=55.29
clat percentiles (usec):
...
bw ( KiB/s): min=10976, max=12496, per=12.50%, avg=12191.82, stdev=157.87, samples=952
iops : min= 2744, max= 3124, avg=3047.92, stdev=39.47, samples=952
lat (usec) : 250=0.23%, 500=99.61%, 750=0.15%, 1000=0.01%
lat (msec) : 2=0.01%, 4=0.01%, 10=0.01%
cpu : usr=0.81%, sys=1.69%, ctx=1463535, majf=0, minf=308
IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
complete : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
issued rwts: total=0,1463226,0,0 short=0,0,0,0 dropped=0,0,0,0
latency : target=0, window=0, percentile=100.00%, depth=16
Run status group 0 (all jobs):
WRITE: bw=95.3MiB/s (99.9MB/s), 95.3MiB/s-95.3MiB/s (99.9MB/s-99.9MB/s), io=5716MiB (5993MB), run=60001-60001msec


Dfuse with leader-rank rebuild:

$ fio --name=random-write --ioengine=pvsync --rw=randwrite --bs=4k --size=128M --nrfiles=4 --directory=/tmp/daos_test1 --numjobs=8 --iodepth=16 --runtime=60 --time_based --direct=1 --buffered=0 --randrepeat=0 --norandommap --refill_buffers --group_reporting

random-write: (g=0): rw=randwrite, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=pvsync, iodepth=16
...
fio-3.7
Starting 8 processes
fio: io_u error on file /tmp/daos_test1/random-write.2.1: Input/output error: write offset=8527872, buflen=4096
fio: pid=28242, err=5

file:io_u.c:1747
bw ( KiB/s): min= 3272, max=12384, per=30.14%, avg=11624.50, stdev=2181.01, samples=128
iops : min= 818, max= 3096, avg=2906.12, stdev=545.25, samples=128
lat (usec) : 250=0.23%, 500=99.59%, 750=0.12%, 1000=0.01%
lat (msec) : 2=0.03%, 4=0.02%
cpu : usr=0.27%, sys=0.66%, ctx=186210, majf=0, minf=494
IO depths : 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0%
submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
complete : 0=0.1%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0%
issued rwts: total=0,186000,0,0 short=0,0,0,0 dropped=0,0,0,0
latency : target=0, window=0, percentile=100.00%, depth=16
Run status group 0 (all jobs):
WRITE: bw=37.7MiB/s (39.5MB/s), 37.7MiB/s-37.7MiB/s (39.5MB/s-39.5MB/s), io=727MiB (762MB), run=19291-19291msec


$ /usr/bin/dmg -o /etc/daos/daos_control.yml -d system stop --ranks=3
DEBUG 01:34:58.026753 main.go:217: debug output enabled
DEBUG 01:34:58.027457 main.go:244: control config loaded from /etc/daos/daos_control.yml
Rank Operation Result

--------- ------
3 stop OK


$ /usr/bin/dmg pool query -j --pool=$DAOS_POOL

$ dmg pool query --pool=733bee7b-c2af-499e-99dd-313b1ef092a9
Pool 733bee7b-c2af-499e-99dd-313b1ef092a9, ntarget=32, disabled=0, leader=2, version=1
Pool space info:
- Target(VOS) count:32
- SCM:
  Total size: 5.0 GB
  Free: 5.0 GB, min:156 MB, max:156 MB, mean:156 MB
- NVMe:
  Total size: 0 B
  Free: 0 B, min:0 B, max:0 B, mean:0 B
Rebuild idle, 0 objs, 0 recs


$ dmg pool list
Pool UUID Svc Replicas

------------

70f73efc-848e-4f6e-b4fd-909bcf9bd427 [1-2]


$ daos pool list-cont --pool=$DAOS_POOL

cf2a95ce-9910-4d5e-814c-cafb0a7f0944


$ dmg pool query --pool=$DAOS_POOL

Pool 70f73efc-848e-4f6e-b4fd-909bcf9bd427,

ntarget=32,

disabled=8,

leader=2,

version=18

Pool space info:

Target(VOS) count:24

SCM:
Total size: 15 GB
Free: 14 GB, min:575 MB, max:597 MB, mean:587 MB

NVMe:
Total size: 0 B
Free: 0 B, min:0 B, max:0 B, mean:0 B
Rebuild done, 1 objs, 57 recs


$ dmg system query -v
Rank UUID Control Address Fault Domain State Reason

---- --------------- ------------ ----- ------
0 2bf0e083-33d6-4ce3-83c4-c898c2a7ddbd 10.7.1.8:10001 boro-8.boro.hpdd.intel.com Joined
1 c9ac1dd9-0f9d-4684-90d3-038b720fd26b 10.7.1.35:10001 boro-35.boro.hpdd.intel.com Joined
2 80e44fe9-3a2b-4808-9a0f-88c3cbe7f565 10.7.1.53:10001 boro-53.boro.hpdd.intel.com Joined
3 a26fd44a-6089-4cc3-a06b-278a85607fd3 10.7.1.52:10001 boro-52.boro.hpdd.intel.com Evicted system stop

$ /usr/bin/dmg system query -v
Rank UUID Control Address Fault Domain State Reason

---- --------------- ------------ ----- ------
0 2bf0e083-33d6-4ce3-83c4-c898c2a7ddbd 10.7.1.8:10001 /boro-8.boro.hpdd.intel.com Joined
1 c9ac1dd9-0f9d-4684-90d3-038b720fd26b 10.7.1.35:10001 /boro-35.boro.hpdd.intel.com Joined
2 80e44fe9-3a2b-4808-9a0f-88c3cbe7f565 10.7.1.53:10001 /boro-53.boro.hpdd.intel.com Joined
3 a26fd44a-6089-4cc3-a06b-278a85607fd3 10.7.1.52:10001 /boro-52.boro.hpdd.intel.com Joined

$ df -h -t fuse.daos
Filesystem Size Used Avail Use% Mounted on
dfuse 14G 867M 14G 7% /tmp/daos_test1

$ fio --name=random-write --ioengine=pvsync --rw=randwrite --bs=4k --size=128M --nrfiles=4 --directory=/tmp/daos_test1 --numjobs=8 --iodepth=16 --runtime=60 --time_based --direct=1 --buffered=0 --randrepeat=0 --norandommap --refill_buffers --group_reporting
random-write: (g=0): rw=randwrite, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=pvsync, iodepth=16
...
fio-3.7
Starting 8 processes file:filesetup.c:349, func=fstat, error=Input/output error
Run status group 0 (all jobs):

$ fusermount -u /tmp/daos_test1/

$ dmg pool list
Pool UUID Svc Replicas

------------

70f73efc-848e-4f6e-b4fd-909bcf9bd427 [1-2]


$ daos pool list-cont --pool=<pool-id>

cf2a95ce-9910-4d5e-814c-cafb0a7f0944


$ dfuse --m=/tmp/daos_test1 --pool=<pool-id> --cont=<pool-id>

$ dmg -o /etc/daos/daos_control.yml -d system stop --ranks=2

DEBUG 02:01:54.916742 main.go:217: debug output enabled
DEBUG 02:01:54.917508 main.go:244: control config loaded from /etc/daos/daos_control.yml
DEBUG 02:01:54.920913 system.go:568: DAOS system stop request: &{unaryRequest:{request:{deadline:{wall:0 ext:0 loc:<nil>} Sys: HostList:[]} rpc:0xd1cf60} msRequest:{} sysRequest:{Ranks:{RWMutex:{w:{state:0 sema:0} writerSem:0 readerSem:0 readerCount:0 readerWait:0} HostSet:{Mutex:{state:0 sema:0} list:0xc00029d340}} Hosts:{Mutex:{state:0 sema:0} list:0xc00029d300}} Prep:true Kill:true Force:false}
DEBUG 02:01:54.921844 rpc.go:196: request hosts: [boro-8:10001 boro-35:10001] 
Rank Operation Result
--------- ------
2 stop OK


$ dmg pool create --size=50G

Creating DAOS pool with automatic storage allocation: 50 GB NVMe + 6.00% SCM
Pool created with 100.00% SCM/NVMe ratio
-----------------------------------------
  UUID          : 4eda8a8c-028c-461c-afd3-704534961572
  Service Ranks : [1-3]                               
  Storage Ranks : [0-3]                               
  Total Size    : 50 GB                               
  SCM           : 50 GB (12 GB / rank)                
  NVMe          : 0 B (0 B / rank)

$ daos cont create --pool=$DAOS_POOL --type=POSIX --oclass=RP_3G1 --properties=rf:2

Successfully created container d71ff6a5-15a5-43fe-b829-bef9c65b9ccb


$ /usr/lib64/mpich/bin/mpirun -host boro-8 -np 30 mdtest -a DFS -z 0 -F -C -i 100 -n 1667 -e 4096 -d / -w 4096 --dfs.chunk_size 1048576 --dfs.cont $DAOS_CONT --dfs.destroy --dfs.dir_oclass RP_3G1 --dfs.group daos_server --dfs.oclass RP_3G1 --dfs.pool $DAOS_POOL

started at 04/22/2021 17:46:20 –
mdtest-3.4.0+dev was launched with 30 total task(s) on 1 node(s)
Command line used: mdtest 'a' 'DFS' '-z' '0' '-F' '-C' '-i' '100' '-n' '1667' '-e' '4096' '-d' '/' '-w' '4096' 'dfs.chunk_size' '1048576' 'dfs.cont' 'd71ff6a5-15a5-43fe-b829-bef9c65b9ccb' 'dfs.destroy' 'dfs.dir_oclass' 'RP_3G1' 'dfs.group' 'daos_server' 'dfs.oclass' 'RP_3G1' '-dfs.pool' '4eda8a8c-028c-461c-afd3-704534961572'
WARNING: unable to use realpath() on file system.
Path:
FS: 0.0 GiB Used FS: -nan% Inodes: 0.0 Mi Used Inodes: -nan%
Nodemap: 111111111111111111111111111111
30 tasks, 50010 files


$ dmg system stop --ranks=3

Rank Operation Result
--------- ------
3 stop OK


Clean-Up

# pool reintegrate
$ dmg pool reintegrate --pool=$DAOS_POOL --rank=3
Reintegration command succeeded

# destroy container
$ daos container destroy --pool=$DAOS_POOL --cont=$DAOS_CONT

# destroy pool
$ dmg pool destroy --pool=$DAOS_POOL
Pool-destroy command succeeded

# stop clients
$ pdsh -S -w $CLIENT_NODES "sudo systemctl stop daos_agent.service"

# disable clients
$ pdsh -S -w $CLIENT_NODES "sudo systemctl disable daos_agent.service"

# stop servers
$ pdsh -S -w $SERVER_NODES "sudo systemctl stop daos_server.service"

# disable servers
$ pdsh -S -w $SERVER_NODES "sudo systemctl disable daos_server.service"




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