So, it sounds like there's a small benefit to the caching, but not much. I'll look into that initial jump, to see if it's caused by my stop-caching code.
Daniel On 01/19/2017 05:09 AM, Jiffin Tony Thottan wrote: > Hi, > > I have done similar exercise on FSAL_GLUSTER > > configuration : > > gluster volume 2x2 using 4 servers with 4GB RAM and IGB ethernet cable > b/w them > > It was export by one of the above server and mounted in another client > machine, > > created 10000 1kb files > > Got a similar kind of result like FSAL_CEPH > > i) dirent caching enabled > real 0m2.518s > real 0m2.706s > real 0m2.628s > real 0m2.712s > real 0m2.197s > real 0m2.065s > real 0m2.072s > real 0m2.674s > real 0m2.649s > real 0m2.652s > > ii.) dirent caching disabled > real 0m6.178s > real 0m2.638s > real 0m2.481s > real 0m2.501s > real 0m2.524s > real 0m2.515s > real 0m2.476s > real 0m2.551s > real 0m2.580s > real 0m2.543s > > Regards, > Jiffin > > On 14/01/17 02:31, Frank Filz wrote: >> Here are the FSAL_CEPH results: >> >> With 10000 files, dirent caching enabled >> real 0m1.032s >> real 0m1.315s >> real 0m1.421s >> real 0m1.429s >> real 0m1.377s >> real 0m1.344s >> real 0m0.667s >> real 0m1.400s >> real 0m1.389s >> real 0m1.728s >> With 10000 files, dirent caching disabled >> real 0m15.483s >> real 0m1.457s >> real 0m1.487s >> real 0m1.511s >> real 0m1.498s >> real 0m1.765s >> real 0m1.445s >> real 0m0.930s >> real 0m0.793s >> real 0m1.178s >> >> We need to investigate why in the uncached case it takes 15 seconds for the >> initial readdir. I repeated the experiment several times cached and uncached >> and consistently got comparable results. >> >> Ceph (as was expected) saw less differentiation between cached and uncached, >> there might still be a small advantage to the cached, but it may not be >> statistically significant. >> >> Frank >> >> >> --- >> This email has been checked for viruses by Avast antivirus software. >> https://www.avast.com/antivirus >> >> >> ------------------------------------------------------------------------------ >> Developer Access Program for Intel Xeon Phi Processors >> Access to Intel Xeon Phi processor-based developer platforms. >> With one year of Intel Parallel Studio XE. >> Training and support from Colfax. >> Order your platform today. http://sdm.link/xeonphi >> _______________________________________________ >> Nfs-ganesha-devel mailing list >> Nfs-ganesha-devel@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/nfs-ganesha-devel > > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, SlashDot.org! http://sdm.link/slashdot > _______________________________________________ > Nfs-ganesha-devel mailing list > Nfs-ganesha-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/nfs-ganesha-devel > ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot _______________________________________________ Nfs-ganesha-devel mailing list Nfs-ganesha-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs-ganesha-devel
