How to clear for file system spaces when the IB switch (NM2-36p and NM2-GW) file systems become full or almost full. (Doc ID 1934039.1)

Last updated on JUNE 26, 2016

Applies to:

Oracle SuperCluster T5-8 Hardware - Version All Versions and later
Exadata X3-2 Hardware - Version All Versions and later
Sun Network QDR InfiniBand Gateway Switch - Version All Versions and later
Sun Datacenter InfiniBand Switch 36 - Version All Versions and later
Information in this document applies to any platform.

Goal

How to clear for file system spaces when the IB switch (NM2-36p and NM2-GW) file systems become full or almost full.

When an IB switch whose root file system (/) and tmpfs file system (/tmp/) become full or almost full, there will be risks to its functionality from a resource point of view.  Running out of resources can cause potential hangs or other side effects, for example, when the root file system is full and users are changing, say user passwords via passwd, it is possible for /etc/shadow to become corrupt or disappear totally.

For NM2-36p IB switches, / incorporates everything besides /dev/shm/ and /tmp/, where /dev/shm/ and /tmp/ are 2 other tmpfs file systems.

For NM2-GW IB gateway switches, / incorporates everything besides /dev/shm/, /config/, /var/log/, and /tmp/, where /config/ and /var/log/ are 2 other disk file systems separate to /.

Solution

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