[Pvfs2-users] Expected/ToExpect vs. real performance ??

[belcampo]

belcampo wrote:
> Hi all,
> 
> New to pvfs and related stuff, so try to be kind with me ;-)
> I installed according the pvfs2-quickstart guide.
> pvfs2-ping -m /mnt/pvfs2
> 
> (1) Parsing tab file...
> 
> (2) Initializing system interface...
> 
> (3) Initializing each file system found in tab file: /etc/fstab...
> 
>    PVFS2 servers: tcp://server:3334
>    Storage name: pvfs2-fs
>    Local mount point: /mnt/pvfs2
>    /mnt/pvfs2: Ok
> 
> (4) Searching for /mnt/pvfs2 in pvfstab...
> 
>    PVFS2 servers: tcp://server:3334
>    Storage name: pvfs2-fs
>    Local mount point: /mnt/pvfs2
> 
>    meta servers:
>    tcp://mmulti:3334
> 
>    data servers:
>    tcp://mmulti:3334
>    tcp://mm1:3334
>    tcp://server:3334
> 
> (5) Verifying that all servers are responding...
> 
>    meta servers:
>    tcp://mmulti:3334 Ok
> 
>    data servers:
>    tcp://mmulti:3334 Ok
>    tcp://mm1:3334 Ok
>    tcp://server:3334 Ok
> 
> (6) Verifying that fsid 533592664 is acceptable to all servers...
> 
>    Ok; all servers understand fs_id 533592664
> 
> (7) Verifying that root handle is owned by one server...
> 
>    Root handle: 1048576
>      Ok; root handle is owned by exactly one server.
> 
> =============================================================
> 
> The PVFS2 filesystem at /mnt/pvfs2 appears to be correctly configured.
> 
> Copying files to /mnt/pvfs limited by network, so OK.
> 
> Did a high IO-demanding muxing of audio/video first locally and then on 
> /mnt/pvfs2 both from the same machine which is one of the data servers.
> 
> Local
> 
> Saving to timetest.mp4: 0.500 secs Interleaving
> 7.58user 19.71system 1:52.26elapsed 24%CPU (0avgtext+0avgdata 
> 0maxresident)k
> 0inputs+0outputs (77major+6054minor)pagefaults 0swaps
> 
> on /mnt/pvfs2
> 
> Saving to timetest.mp4: 0.500 secs Interleaving
> 37.56user 61.05system 41:54.96elapsed 3%CPU (0avgtext+0avgdata 
> 0maxresident)k
> 0inputs+0outputs (68major+6063minor)pagefaults 0swaps
> 
> System load user about times 5, system > times 20, needed time > times 20.
> 
> What could be the reason it is, like it is.
> 
> Regards
> 
> Henk Schoneveld
> 
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Additional info
PVF version 2.7.0
kernel 2.6.22.9-desktop586-1mdv
x86-32 tcp/ip realtek 8139too on all
no MPI of MPI-IO
logs only tell
Client
D 15:48:13.061859] [INFO]: Mapping pointer 0xb6769000 for I/O
Server
D 02/04 15:47] PVFS2 Server version 2.7.0 starting.