Re: [zfs-discuss] zpool status OK but zfs filesystem seems hung

[Dave]

Thanks for the reply but this seems to be a bit different.  

a couple of things I failed to mention;
1) this is a secondary pool and not the root pool. 
2) the snapshot are trimmed to only keep 80 or so.

The system boots and runs fine.   It's just an issue for this secondary pool 
and filesystem.It seems to be directly related to I/O intensive operations 
as the (full) backup seems to trigger it, never seen it happen with incremental 
backups...


Thanks.
-- 
This message posted from opensolaris.org
___
zfs-discuss mailing list
zfs-discuss@opensolaris.org
http://mail.opensolaris.org/mailman/listinfo/zfs-discuss

[zfs-discuss] zpool status OK but zfs filesystem seems hung

[Dave]

Hello all,
  I have a situation where zpool status shows no known data errors but all 
processes on a specific filesystem are hung.  This has happened 2 times before 
since we installed Opensolaris 2009.06 snv_111b. For instance there are two 
files systems in this pool 'zfs get all' on one filesystem returns with out 
issue when ran on the other filesystem it hangs.  Also a 'df -h' hangs, etc.

This file system has many different operation running on it;
1) It receives incremental snapshot every 30 minutes continuously.
2) every night a clone is made from one of the received snapshot streams then a 
filesystem backup is taken on that clone (the backup is a directory traversal) 
once the backup completes the clone is destroyed. 

We tried to upgrade to the latest build but ran in to the current 'check sum' 
issue in build snv_122 so we rolled back.

# uname -a
SunOS lahar2 5.11 snv_111b i86pc i386 i86pc

# zpool status zdisk1
  pool: zdisk1
 state: ONLINE
 scrub: none requested
config:

NAMESTATE READ WRITE CKSUM
zdisk1  ONLINE   0 0 0
  raidz1ONLINE   0 0 0
c7t1d0  ONLINE   0 0 0
c7t2d0  ONLINE   0 0 0
c7t3d0  ONLINE   0 0 0
c7t4d0  ONLINE   0 0 0
c7t5d0  ONLINE   0 0 0
spares
  c7t6d0AVAIL

errors: No known data errors


The filesystem is currently in this 'hung' state,  is there any commands I can 
run to help debug the issue?

TIA
-- 
This message posted from opensolaris.org
___
zfs-discuss mailing list
zfs-discuss@opensolaris.org
http://mail.opensolaris.org/mailman/listinfo/zfs-discuss