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Asset ID: 1-72-1164934.1
Update Date:2011-05-19
Keywords:

Solution Type  Problem Resolution Sure

Solution  1164934.1 :   Sun Storage 7000 Unified Storage System: ZFS - Slow resilvering and/or zpool scrub  


Related Items
  • Sun Storage 7410 Unified Storage System
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  • Sun Storage 7210 Unified Storage System
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  • Sun Storage 7310 Unified Storage System
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  • Sun Storage 7110 Unified Storage System
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Related Categories
  • GCS>Sun Microsystems>Storage - Disk>Unified Storage
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In this Document
  Symptoms
  Changes
  Cause
  Solution


Applies to:

Sun Storage 7110 Unified Storage System - Version: Not Applicable and later   [Release: N/A and later ]
Sun Storage 7210 Unified Storage System - Version: Not Applicable and later    [Release: N/A and later]
Sun Storage 7310 Unified Storage System - Version: Not Applicable and later    [Release: N/A and later]
Sun Storage 7410 Unified Storage System - Version: Not Applicable and later    [Release: N/A and later]
Information in this document applies to any platform.

Symptoms

To discuss this information further with Oracle experts and industry peers, we encourage you to review, join or start a discussion in the My Oracle Support Community - 7000 Series ZFS Appliances


 - Resilvering runs for a very long time.

 - Resilvering reports 100% progress, but does not complete.

 - Scrub/resilver causes systemic slowdown.

Changes

N/A

Cause

Cause:  Several related CRs around resilvering performance and status reporting.

Bugs include:

  6743992 - scrub/resilver causes systemic slowdown
  6865084 - When resilver was in progress BUI/CLI became inaccessible
  6866277 - Resilver takes longer time when appliance has faulted drive
  6880105 - disk resilver hangs
  6891824 - 7410 NAS head "continually resilvering" following HDD replacement
  6898125 - very poor write performance during resilvering process

Solution

Steps to follow:

 - Upgrade system software to 2010.Q1 or later. Enhancements to resilvering
   performance were included in this version.

If still unsuccessful in completing resilver, pause any scheduled replication
or snapshot jobs.  After the "100%" mark of the resilver progress, the system
is exclusively working on the snapshots.

Creating additional snapshots, either directly or via replication, will delay
the completion of the resilver.


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

Additional Resources:

Appliance help under Maintenance:System:Updates for software upgrade procedure and related information.





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