Oracle ZFS Storage Appliance: Very high disk ops/sec seen in BUI/CLI 'status show'

Asset ID:	1-72-1500418.1
Update Date:	2018-03-07
Keywords:

Solution Type Problem Resolution Sure

Solution 1500418.1 : Oracle ZFS Storage Appliance: Very high disk ops/sec seen in BUI/CLI 'status show'

Related Items


Sun ZFS Storage 7420
 Oracle ZFS Storage ZS5-2
 Sun Storage 7110 Unified Storage System
 Oracle ZFS Storage ZS3-2
 Sun Storage 7210 Unified Storage System
 Oracle ZFS Storage ZS4-4
 Sun Storage 7410 Unified Storage System
 Oracle ZFS Storage ZS5-4
 Sun ZFS Storage 7120
 Sun Storage 7310 Unified Storage System
 Oracle ZFS Storage ZS3-4
 Sun ZFS Storage 7320
 Oracle ZFS Storage ZS3-BA

Related Categories


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

Created from <SR 3-6224371181>

Applies to:

Sun ZFS Storage 7420 - Version All Versions and later
Sun ZFS Storage 7320 - Version All Versions and later
Sun ZFS Storage 7120 - Version All Versions and later
Sun Storage 7210 Unified Storage System - Version All Versions and later
Sun Storage 7110 Unified Storage System - Version All Versions and later
7000 Appliance OS (Fishworks)

Symptoms

This is a sample output:

CLI> status show

Activity:
   CPU             6 %util                  Sunny
   FTP             0 bytes/sec              Sunny
   Disk        10364 ops/sec                Rainy <----- not expected
   iSCSI           0 ops/sec                Sunny
   NFSv3         139 ops/sec                Sunny
   NFSv4       417 ops/sec                Partly Cloudy
   Network     5.89M bytes/sec              Sunny
   SMB           237 ops/sec                Sunny

Changes

In this case, continuous replication had been turned on for some projects.

Cause

A combination of temporary files being created and deleted in normal operation and continuous replication being turned on caused the high Disk ops/sec.

Solution

This solution should be considered a workaround.

Turn off continuous replication and use scheduled replication instead.

This problem will be less noticable when the L2 cache algorithm available in later releases of the appliance software is used.

Attachments

This solution has no attachment