OCFS2: High Amount of Concurrent Read/Write Access (Parallel Access from Multiple Nodes in Same Time ) Causing Performance Issues
Last updated on JANUARY 12, 2018
Applies to:Linux OS - Version Oracle Linux 5.6 and later
Oracle VM - Version 3.3.1 to 3.3.1 [Release OVM33]
- 2 OCFS2 Nodes
- Single OCFS2 volume
- Single FC LUN
- 1Gbit Network Interface
For the test purposes du command is being used as example.
First test is executed by doing du command first on node 1 then on node 2:
Result is drastically different, it took almost one hour to finish the test while both nodes were trying to execute du command on shared OCFS2 volume.
Example OCFS2 volume /ocfs_test holds relatively small files
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