It is said that Aaron Wiebe, at Wed, 02 Sep 2009, wrote: > Have a look at these two kernel params - I'd recommend bumping them up > to 128 (they're 16 by default). > > sunrpc.tcp_slot_table_entries > sunrpc.udp_slot_table_entries They were indeed 16. I've bumped them up to 128, and am trying again. > Keep in mind that this could also be a serialization issue. If you've > got a 3ms latency, and you're performing all of your opens serially, > you aren't going to get much faster. If you do the work in parallel > you'll likely get substantially better numbers. It appears it might just be serialization. When I run more than 1 thread, I can consistently get between 200 and 250 files/thread/second (up to about 10 threads, at which point I get diminishing returns per thread). I seem to be doing a lot of GETATTR's, and it appears to be driven by perl. We are open()'ing files with +>filename and apparently perl will do an fstat for us after opening. Thanks for the tip, Aaron! -j > -Aaron > > > On Wed, Sep 2, 2009 at 2:08 PM, Jason Legate<linux-nfs@xxxxxxxxxxx> wrote: > > Hi, I'm trying to setup a server that we can create millions of files on over > > NFS. ?When I run our creation benchmark locally ?I can get around 3000 files/ > > second in the configuration we're using now, but only around 300/second over > > NFS. ?It's mounted as this: > > > > rw,nosuid,nodev,noatime,nodiratime,hard,bg,nointr,rsize=32768,wsize=32768,tcp, > > nfsvers=3,timeo=600,actimeo=600,nocto > > > > When I mount the same FS over localhost instead of across the lan, it performs > > about full speed (the 3000/sec). ?Anyone have any ideas what I might tweak or > > look at? > > > > We're going to be testing various XFS/LVM configs to get the best performance, > > but right out the gate, NFS having a 10:1 penalty of performance doesn't bode > > well. > > > > Thanks in advance, > > Jason > > -- > > To unsubscribe from this list: send the line "unsubscribe linux-nfs" in > > the body of a message to majordomo@xxxxxxxxxxxxxxx > > More majordomo info at ?http://vger.kernel.org/majordomo-info.html > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-nfs" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
