Bad performance of 7.0 nfs client with Solaris nfs server

[Valerio Daelli]

>
>  I have yes solved this issue and I have another test.

^^^ I haven't yet solved this issue

Sorry.

>  Now the mount is sync (no async) and the iozone includes
>  the -D flag.
>  Now the write performance boosts from 3MB/s to 30MB/s.
>
>  ---
>  root at bsd7:~ iozone -D -+q 1 -i 0 -i 1 -r 2048 -n 2048 -g 2G -Raceb
>  iozone.xls -f /mnt/nest.ifom-ieo-campus.it/iozone/file.tmp
>
>         Iozone: Performance Test of File I/O
>                 Version $Revision: 3.283 $
>                 Compiled for 32 bit mode.
>                 Build: freebsd
>
>         Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins
>                      Al Slater, Scott Rhine, Mike Wisner, Ken Goss
>                      Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR,
>                      Randy Dunlap, Mark Montague, Dan Million,
>                      Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy,
>                      Erik Habbinga, Kris Strecker, Walter Wong.
>
>         Run began: Mon Mar 17 11:06:28 2008
>
>         Using msync(MS_ASYNC) on mmap files
>
>         Delay 1 seconds between tests enabled.
>         Record Size 2048 KB
>
>         Using minimum file size of 2048 kilobytes.
>         Using maximum file size of 2097152 kilobytes.
>
>         Excel chart generation enabled
>         Auto Mode
>         Include close in write timing
>         Include fsync in write timing
>         Command line used: iozone -D -+q 1 -i 0 -i 1 -r 2048 -n 2048 -g 2G
>  -Raceb iozone.xls -f /mnt/nest.ifom-ieo-campus.it/iozone/file.tmp
>
>         Output is in Kbytes/sec
>         Time Resolution = 0.000004 seconds.
>
>         Processor cache size set to 1024 Kbytes.
>         Processor cache line size set to 32 bytes.
>
>         File stride size set to 17 * record size.
>                                                             random
>  random    bkwd  record  stride
>               KB  reclen   write rewrite    read    reread    read
>  write    read rewrite    read
>             2048    2048   49419   49755   629565   632905
>             4096    2048    7713   47431   625536   616224
>             8192    2048   28479   49564   630012   620276
>            16384    2048   26492   49515   631681   621500
>            32768    2048   13030   49572   631771   617552
>            65536    2048   24907   37586^C
>  ---
>
>  Notice that now we have using msync(MS_ASYNC) on mmap files
>  (not a kernel expert so not sure if it is related to our problem).
>  Without the -D flag we get 3MB/s with iozone.
>  Thanks for you help!
>
>  Valerio Daelli
>