Exalogic Virtual : Life Expectancy of InfiniBand Switch NM2-GW is Degrading at Rapid Rate (Doc ID 2139293.1)

Last updated on OCTOBER 19, 2016

Applies to:

Oracle Exalogic Elastic Cloud Software - Version 2.0.6.2.3 to 2.0.6.2.160419
Linux x86-64
Oracle Virtual Server (x86-64)

Symptoms

In Exalogic Virtual some rare cases, the NM2-GW IB Switch SSD life expectancy is dropping faster than other Switches.

By monitoring the 'showdisk' command found in recent firmware 2.1.x releases, it is found some switches losing the SSD life at a rate over 10% a month. Whereas, it had been expected that this rate would be much less than 1% a month in normal usage.

For example, following is the value drop of 'Estimated Remaining Life' (from the output of #showdisk) collected on four NM2 GW Switches in Exalogic Full Rack (virtual) on March 01 and April 04 (almost one month interval):

NM2-GW Switch March 01 April 04 Difference
exa01gw01 97,089% 95,452% 1,637%
exa01gw02 62,503% 43,746% 18,757%
exa01gw03 99,375% 96,654% 2,721%
exa01gw04 45,294% 41,331% 3,963%

The IB Switch SSD Life Expectancy can be seen with the 'showdisk' command as follows:

 

Cause

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