Performance degradation in GPFS filesystem
Issue
- We upgraded from RHEL6.2 to RHEL6.4 and are observing split I/Os and performance degradation of 15%-50% in GPFS filesystem performance.
- What we notice is that performance degrades when GPFS block size is 4MB and higher (8MB, 16MB) which leads to larger I/O sizes.
Environment
- Red Hat Enterprise Linux 6
- IBM GPFS
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