Team,
These are some preliminary results with pNFS block. They look very
promising both performance and scalability. They uncovered some
instability but mainly due to HW issues; no SW issues. These results are
our prove that the latest pNFS block code is stable and performing
reasonably well.
Single client pNFS performance was 86MB/sec write performance for
reference. Thank you very much for your patience and support
We’ve finished the testing and analysis of pNFS vs. MPFS. It took much
longer than expected due to several stability issues uncovered on both the
client and the server. Some of the issues occurred during read testing,
which had never been a focus of previous testing efforts. Anyway, please
find the results below. To help with the below interpretation, please
reference the following key:
SW8xN-MPFS Sequential Write 8 clients by N threads using MPFS
(special build using latest kernel on Fedora 15)
SR8xN-MPFS Sequential Read 8 clients by N threads using MPFS
(special build on Fedora 15)
SW8xN-pNFS Sequential Write 8 clients by N threads using pNFS
(on Fedora 15)
SR8xN-pNFS Sequential Read 8 clients by N threads using pNFS
(on Fedora 15)
SW8xN-pNFS2 Sequential Write 8 clients by N threads using pNFS
(on Fedora 15)
SR8xN-pNFS2 Sequential Read 8 clients by N threads using pNFS
(on Fedora 15)
SR8xN-pNFS3 Sequential Read 8 clients by N threads using pNFS
(on Fedora 15)
SW8xN-MPFS2 Sequential Write 8 clients by N threads using MPFS
SR8xN-MPFS2 Sequential Read 8 clients by N threads using MPFS
I think/hope the rest is self-explanatory based on labels, etc. To
summarize:
pNFS2 pNFS4vs.MPFS
SW8x1 653121.85 -8%
SW8x2 835101.05 -10%
SW8x3 846188.63 -8%
SW8x4 852617.66 -6%
SR8x1 674129.88 43%
SR8x2 634800.33 34%
SR8x3 629843.20 28%
SR8x4 577197.70 19%
Let me know what you think or if you have any questions. I’m moving on to
other projects that I’ve committed to and am currently behind on.
--
--
Best Regards
Sorin Faibish
Corporate Distinguished Engineer
Fast Data Group - Office of CTO
EMC2
where information lives
Phone: 508-249-5745
Mobile: 617-510-0422
email: sfaibish@xxxxxxx
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