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StorageGRID appliance performance degradation following E-Series upgrade to 11.70.1GA

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Applies to

  • SG5760 
  • SG6060 with one or more expansions trays
  • SANtricity OS 11.70.1GA
  • Storage RAID Mode: DDP16 (16+2 stripe)
    • In StorageGRID management interface, check under Nodes > Node_Name > Hardware

Screen Shot 2021-07-19 at 6.24.51 PM.png

Issue

  • StorageGRID appliances that match above criteria may experience significant performance degradation after upgrade to 11.70.1GA.
  • The performance degradation may appear in various forms. Below are few signatures that those appliances may experience:
  • Increased E-Series drive impending failures due to Stagnant I/O. Following events can be seen in SANtricity System Manager under Support > Events.

Summary of impending drive failure detected by controller
Drive copy triggered by a controller detected impending drive failure

  • Increased disk read/write latencies. Check under Support > Diagnostics page in StorageGRID management interface.
  • Storage node appliance unplanned reboot highlighted by node down related alerts "Unable to communicate with node". The storage node base OS syslog indicates the node was rebooted by the slow I/O monitoring script as a recovery mechanism:

Jul XX XX:XX:10 localhost wdogd[1990]: SIMN: '/usr/bin/storagegrid-slowio-monitor report_state emergency BLOCK_DEVICE_RANGEDB_001 BLOCK_DEVICE_RANGEDB_002 BLOCK_DEVICE_RANGEDB_003 BLOCK_DEVICE_RANGEDB_004 BLOCK_DEVICE_RANGEDB_005 BLOCK_DEVICE_RANGEDB_006 BLOCK_DEVICE_RANGEDB_008 BLOCK_DEVICE_RANGEDB_009 BLOCK_DEVICE_RANGEDB_010 BLOCK_DEVICE_RANGEDB_011 BLOCK_DEVICE_RANGEDB_012 BLOCK_DEVICE_RANGEDB_013 BLOCK_DEVICE_RANGEDB_014 BLOCK_DEVICE_RANGEDB_015 warning BLOCK_DEVICE_RANGEDB_000 BLOCK_DEVICE_RANGEDB_007 BLOCK_DEVICE_VAR_LOCAL' executed successfully, WANTS reboot

Jul XX XX:XX:22 localhost systemd[1]: Stopping StorageGRID host service...

 

 

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