Oracle ZFS Storage Appliance: 'Zero NFS Ops' due to Snapshot Deletion

Asset ID:	1-72-1944920.1
Update Date:	2015-04-23
Keywords:

Solution Type Problem Resolution Sure

Solution 1944920.1 : Oracle ZFS Storage Appliance: 'Zero NFS Ops' due to Snapshot Deletion

Related Items


Sun ZFS Storage 7420
 Oracle ZFS Storage ZS3-2
 Sun Storage 7110 Unified Storage System
 Sun Storage 7210 Unified Storage System
 Sun Storage 7410 Unified Storage System
 Oracle ZFS Storage ZS3-4
 Sun Storage 7310 Unified Storage System
 Sun ZFS Storage 7120
 Sun ZFS Storage 7320
 Oracle ZFS Storage ZS3-BA

Related Categories


PLA-Support>Sun Systems>DISK>ZFS Storage>SN-DK: 7xxx NAS

In this Document

Symptoms

Cause

Solution

References

Created from <SR 3-9615023841>

Applies to:

Sun Storage 7310 Unified Storage System - Version All Versions and later
Sun ZFS Storage 7120 - Version All Versions and later
Oracle ZFS Storage ZS3-2 - Version All Versions and later
Oracle ZFS Storage ZS3-4 - Version All Versions and later
Sun Storage 7210 Unified Storage System - Version All Versions and later
7000 Appliance OS (Fishworks)

Symptoms

Snap deletion of a file or project in the range of 100GBs on a NAS system can negatively affect the NFS services.

Typically the NFS operations can be seen to drop to 'Zero NFS ops' when viewed by Analytics.

The client systems may also experience latency on their operations ( as would be expected since they connect via NFS )

Cause

The cause can be identified as

bug CR 17582897 - high NFS load makes ZFS appliance unresponsive due to OpenStateID exhaustion

and

CR 18609976 - large deletes cause NFS ops to drop to zero

As the bug can also cause zero nfs ops

and

CR 20048651 - Backport 18609976 to AK-2013-REL - large deletes cause long sync times, write op

Solution

Upgrade to Appliance Firmware Release Micro 2013.1.2.7 (or any 2013.1.3.x release). to start with as the final version of fix is included in 2013.1.4.0.

References

<BUG:17582897> - HIGH NFS LOAD MAKES ZFS APPLIANCE UNRESPONSIVE DUE TO OPENSTATEID EXHAUSTION
<NOTE:166650.1> - Working Effectively With Oracle Support - Best Practices
<BUG:18609976> - LARGE DELETES CAUSE LONG SYNC TIMES, WRITE OPS GO TO ZERO
<BUG:20048651> - BACKPORT 18609976 TO AK-2013-REL - LARGE DELETES CAUSE LONG SYNC TIMES, WRITE OP

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