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17.8. Displaying Volume Status
You can display the status information about a specific volume, brick, or all volumes, as needed. Status information can be used to understand the current status of the brick, NFS processes, self-heal daemon and overall file system. Status information can also be used to monitor and debug the volume information. You can view status of the volume along with the details:
- detail - Displays additional information about the bricks.
- clients - Displays the list of clients connected to the volume.
- mem - Displays the memory usage and memory pool details of the bricks.
- inode - Displays the inode tables of the volume.
- fd - Displays the open file descriptor tables of the volume.
- callpool - Displays the pending calls of the volume.
Setting Timeout Period
When you try to obtain information of a specific volume, the command may get timed out from the CLI if the originator glusterd takes longer than 120 seconds, the default time out, to aggregate the results from all the other glusterds and report back to CLI.
You can use the
--timeout option to ensure that the commands do not get timed out by 120 seconds.
For example,
# gluster volume status --timeout=500 VOLNAME inode
It is recommended to use
--timeout option when obtaining information about the inodes or clients or details as they frequently get timed out.
Display information about a specific volume using the following command:
# gluster volume status --timeout=value_in_seconds [all|VOLNAME [nfs | shd | BRICKNAME]] [detail |clients | mem | inode | fd |callpool]
For example, to display information about test-volume:
# gluster volume status test-volume
Status of volume: test-volume
Gluster process Port Online Pid
------------------------------------------------------------
Brick Server1:/rhgs/brick0/rep1 24010 Y 18474
Brick Server1:/rhgs/brick0/rep2 24011 Y 18479
NFS Server on localhost 38467 Y 18486
Self-heal Daemon on localhost N/A Y 18491
The self-heal daemon status will be displayed only for replicated volumes.
Display information about all volumes using the command:
# gluster volume status all
# gluster volume status all
Status of volume: test
Gluster process Port Online Pid
-----------------------------------------------------------
Brick Server1:/rhgs/brick0/test 24009 Y 29197
NFS Server on localhost 38467 Y 18486
Status of volume: test-volume
Gluster process Port Online Pid
------------------------------------------------------------
Brick Server1:/rhgs/brick0/rep1 24010 Y 18474
Brick Server1:/rhgs/brick0/rep2 24011 Y 18479
NFS Server on localhost 38467 Y 18486
Self-heal Daemon on localhost N/A Y 18491
Display additional information about the bricks using the command:
# gluster volume status VOLNAME detail
For example, to display additional information about the bricks of test-volume:
# gluster volume status test-volume detail
Status of volume: test-vol
------------------------------------------------------------------------------
Brick : Brick Server1:/rhgs/test
Port : 24012
Online : Y
Pid : 18649
File System : xfs
Device : /dev/sda1
Mount Options : rw,relatime,user_xattr,acl,commit=600,barrier=1,data=ordered
Inode Size : 256
Disk Space Free : 22.1GB
Total Disk Space : 46.5GB
Inode Count : 3055616
Free Inodes : 2577164
Detailed information is not available for NFS and the self-heal daemon.
Display the list of clients accessing the volumes using the command:
# gluster volume status VOLNAME clients
For example, to display the list of clients connected to test-volume:
# gluster volume status test-volume clients
Brick : Server1:/rhgs/brick0/1
Clients connected : 2
Hostname Bytes Read BytesWritten OpVersion
-------- --------- ------------ ---------
127.0.0.1:1013 776 676 70200
127.0.0.1:1012 50440 51200 70200
Client information is not available for the self-heal daemon.
Display the memory usage and memory pool details of the bricks on a volume using the command:
# gluster volume status VOLNAME mem
For example, to display the memory usage and memory pool details for the bricks on test-volume:
# gluster volume status glustervol mem
Memory status for volume : glustervol
----------------------------------------------
Brick : rhsqaci-vm33.lab.eng.blr.redhat.com:/bricks/brick0/1
Mallinfo
--------
Arena : 11509760
Ordblks : 278
Smblks : 16
Hblks : 17
Hblkhd : 17350656
Usmblks : 0
Fsmblks : 1376
Uordblks : 3850640
Fordblks : 7659120
Keepcost : 121632
----------------------------------------------
Brick : rhsqaci-vm44.lab.eng.blr.redhat.com:/bricks/brick0/1
Mallinfo
--------
Arena : 11595776
Ordblks : 329
Smblks : 44
Hblks : 17
Hblkhd : 17350656
Usmblks : 0
Fsmblks : 4240
Uordblks : 3888928
Fordblks : 7706848
Keepcost : 121632
----------------------------------------------
Brick : rhsqaci-vm32.lab.eng.blr.redhat.com:/bricks/brick0/1
Mallinfo
--------
Arena : 9695232
Ordblks : 306
Smblks : 67
Hblks : 17
Hblkhd : 17350656
Usmblks : 0
Fsmblks : 5616
Uordblks : 3890736
Fordblks : 5804496
Keepcost : 121632
Display the inode tables of the volume using the command:
# gluster volume status VOLNAME inode
For example, to display the inode tables of test-volume:
# gluster volume status test inode
inode tables for volume test
----------------------------------------------
Brick : rhsqaci-vm35.lab.eng.blr.redhat.com:/bricks/brick1/test
Connection 1:
LRU limit : 16384
Active Inodes : 1000
LRU Inodes : 1
Purge Inodes : 0
Display the open file descriptor tables of the volume using the command:
# gluster volume status VOLNAME fd
For example, to display the open file descriptor tables of test-volume:
# gluster volume status test-volume fd
FD tables for volume test-volume
----------------------------------------------
Brick : Server1:/rhgs/brick0/1
Connection 1:
RefCount = 0 MaxFDs = 128 FirstFree = 4
FD Entry PID RefCount Flags
-------- --- -------- -----
0 26311 1 2
1 26310 3 2
2 26310 1 2
3 26311 3 2
Connection 2:
RefCount = 0 MaxFDs = 128 FirstFree = 0
No open fds
Connection 3:
RefCount = 0 MaxFDs = 128 FirstFree = 0
No open fds
FD information is not available for NFS and the self-heal daemon.
Display the pending calls of the volume using the command:
# gluster volume status VOLNAME callpool
Note, each call has a call stack containing call frames.
For example, to display the pending calls of test-volume:
# gluster volume status test-volume callpool
Pending calls for volume test-volume
----------------------------------------------
Brick : Server1:/rhgs/brick0/1
Pending calls: 2
Call Stack1
UID : 0
GID : 0
PID : 26338
Unique : 192138
Frames : 7
Frame 1
Ref Count = 1
Translator = test-volume-server
Completed = No
Frame 2
Ref Count = 0
Translator = test-volume-posix
Completed = No
Parent = test-volume-access-control
Wind From = default_fsync
Wind To = FIRST_CHILD(this)->fops->fsync
Frame 3
Ref Count = 1
Translator = test-volume-access-control
Completed = No
Parent = repl-locks
Wind From = default_fsync
Wind To = FIRST_CHILD(this)->fops->fsync
Frame 4
Ref Count = 1
Translator = test-volume-locks
Completed = No
Parent = test-volume-io-threads
Wind From = iot_fsync_wrapper
Wind To = FIRST_CHILD (this)->fops->fsync
Frame 5
Ref Count = 1
Translator = test-volume-io-threads
Completed = No
Parent = test-volume-marker
Wind From = default_fsync
Wind To = FIRST_CHILD(this)->fops->fsync
Frame 6
Ref Count = 1
Translator = test-volume-marker
Completed = No
Parent = /export/1
Wind From = io_stats_fsync
Wind To = FIRST_CHILD(this)->fops->fsync
Frame 7
Ref Count = 1
Translator = /export/1
Completed = No
Parent = test-volume-server
Wind From = server_fsync_resume
Wind To = bound_xl->fops->fsync
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