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Hi Prasun,
pNFS was recently released in a "tech-preview" form. With multiple MDS-es or even an all-symmetric arch (every ganesha node can act as both DS and MDS, which will also be a supported config) you could potentially see improvements (due to increased throughput) but, from our experiments so far (and this is certainly work in progress) there is much improved perf for large files and not so much for small file i/o (using distributed iozone workloads). That said, we have not done a lot of work playing around with the tuneables as yet (glusterfs side options and things like vm-background ratio and vm-dirty ratio tuning on the OS side) for small file pNFS access, so it is pending exercise at this point. We can confirm only when these performance experiments are completed. But if you happen to have large files as well, it should be a win. And the best part is, it comes at zero extra cost to try it out. If you have the bandwidth, you should probably give pnfs a spin with the latest glusterfs versions if you want very quick answers. It is quite easy to setup and we could lend a helping hand there. And maybe you will pleasantly surprise us ;-) :) Anand On 08/13/2015 12:18 PM, Prasun Gera wrote:
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