> 200 processes: By "200 processes", I meant 200 dd's, each reading from /dev/zero and writing to a file on the filesystem. The script "nfs" was run twice, first with a local filesystem and the second time with the same filesystem NFS mounted. Thanks, - KK linux-nfs-owner@xxxxxxxxxxxxxxx wrote on 06/19/2008 12:16:23 PM: > > Hi, > > I am running 2.6.25 kernel on a [4 way, 3.2 x86_64, 4GB] system. The test > is doing I/O on a local ext3 filesystem, and measuring the bandwidth, and > then NFS mounting the filesystem loopback on the same system. I have > configured 64 nfsd's to run. The test script is attached at the bottom. > > My configuration is: > /dev/some-local-disk : /local > NFS mount /local : /nfs > > The result is: > 200 processes: > /local: 108000 KB/s > /nfs: 66000 KB/s: Drop of 40% > > 300 processes (KB/s): > /local: 112000 KB/s > /nfs: 57000 KB/s: Drop of 50% > > I am not using any tuning, though I have tested with both > sunrpc.tcp_slot_table_entries=16 & 128 > > Is this big a drop expected for a loopback NFS mount? Any > feedback/suggestions are very > appreciated. > > Thanks, > > - KK > > (See attached file: nfs)[attachment "nfs" deleted by Krishna Kumar2/India/IBM] -- 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
