lkml.org 
[lkml]   [1999]   [Mar]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: NFS client performance 1.5 orders of magnitude too slow? (fwd)
    On Tue, Mar 09, 1999 at 01:51:30PM -0700, Godmar Back wrote:

    [...]
    >
    > However, the default wsize may be an issue for large files.
    > I reported that FreeBSD 3.0 takes 6 seconds to write a 12 MB
    > file where Linux 2.2.3 with wsize=4k takes 14 seconds.
    > (Btw, FreeBSD 2.2.8 takes only 2.5 seconds for the same file.)
    >
    > So I tested the Linux client with wsize=8k; it is still a lot slower.
    > A Linux 2.2.3 client with wsize=8k takes about 30 seconds to write
    > a 12 MB file (this is with a different server), while a BSD client takes
    > about 18 seconds with the same server.
    >

    Here, using autofs (client : 2.2.2-ac7, server : 2.0.32/unfsd),
    I have :

    [pcodile]/alienor/home/danis/tmp > time cp /tmp/linux-2.2.2.tar.gz .
    0.00user 1.77system 0:03.20elapsed 55%CPU (0avgtext+0avgdata 0maxresident)k
    0inputs+0outputs (3322major+14minor)pagefaults 0swaps

    That is, 3 secondes to copy a 12M files over a 100Mb link
    using an 'old' userland nfs server.


    The mount options is :

    alienor:/home on /alienor/home type nfs (rw,nolock,soft,intr,rsize=8192,wsize=8192,addr=<something>)

    [...]

    >
    > - Godmar
    >

    A+
    --
    Thierry Danis

    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.rutgers.edu
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 13:50    [W:0.022 / U:0.736 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site