Hi All,
We have recently built a 4-node Oracle single-instance CFS cluster, with more to on the way.
The cluster will host many databases, and all nodes will be active. The databases will migrate from non-clustered to CFS clustered servers, and we are concerned about what effect CFS may have on performance.
Concerns:
- Suitability of our LLT links to handle intra-node communication generated by CFS ?
- Location of CFS primary, for each filesytem, and how to determine if it is optimal ?
- When multiple nodes write to the same filesystem simultaeously, would that be detrimental to performance ?
- I am aware of GLM lock/release as one source of CFS intra-node traffic, but wondering if there are other significant sources, such as VxFS cache coherency ?
- How to best monitor CFS overhead, intra-node traffic, and overall health ?
Thank your for reading !
Ken W
---------------------Configuration---------------------
Red Hat RHEL 6.5
SFCFSHA 6.1.1 with P200 patch
2 x 1 Gbit ethernet as LLT links, on dedicated VLANs
Oracle 11.2.0.3 and 12.1.0.2
Oracle code local to each node (outside of cluster control)
Oracle data files on CFS filesystem dedicated to only datases running on that node.
Oracle Redo on a single shared filesytem for all nodes.
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