Dai Ngo wrote: >Henrik Johansen wrote: >> >> I have previously played with the nfsv3_bsize / nfsv4_bsize but never >> went as high as 1 MB. >> I am bit concerned about the NFS client issuing 1 MB reads / writes >> when the servers filesystem is using a lower blocksize since this kind >> of misalignment could multiply the IOPS on the serverside. >> >> I will have to test this to be sure though. >> >> It does however show improvement : >> >> henrik at opensolaris:/tmpfs# rm /nfs/testfile_5g; ptime cp testfile_5g >> /nfs/ >> >> real 31.321109059 >> user 0.017099704 >> sys 11.804887174 >> >> Which gives me about ~165 mb/s - the fastest so far for a cp operation. >You should get the same result with 'forcedirectio' mount option if you >don't want to increase nfsv3_bsize / nfsv4_bsize which has system-wide >effect.
Well - I am not. The 'forcedirectio' mount option is permanently on this the client since I want to test the server and not the clients cache. I really cannot make sense of this; everything else litterally sucks the juice out of the 10 Gbit link execpt NFS. >-Dai -- Med venlig hilsen / Best Regards Henrik Johansen
