Re: 2GB limit on samba and nfs?

From: Rick Stevens (rstevens_at_vitalstream.com)
Date: 04/28/05

  • Next message: Rick Stevens: "Re: documentation on network install" 
    Date: Thu, 28 Apr 2005 14:09:58 -0700
To: guy@incentre.net, For users of Fedora Core releases <fedora-list@redhat.com>

    Guy Fraser wrote:
    > On Thu, 2005-28-04 at 13:56 -0500, Debbie Tropiano wrote:
    >
    >>Mike -
    >>
    >>Did you ever get a resolution for this? We're seeing similar problems
    >>with two of our FC2 systems (2.6.6 kernel) interacting with each other
    >>via NFS and/or with other systems (including Solaris). Our testing
    >>shows that it's only a problem on two (of our five FC2 systems) and one
    >>of them has a 3ware RAID card (the Escalade, not the newer 9000 series)
    >>so I'm not sure if that's a factor.
    >>
    >>Could it be an NFS setting somewhere (the systems were installed from
    >>the same media and should be setup very close to the same).
    >>
    >>We're pretty baffled by this problem, so any advice would be appreciated.
    >>
    >
    >
    > I regularly send files over 3GB to my FC3 machine running Samba.
    > I am unable to send files over 4GB. For larger files I had been
    > using an external Firewire drive formated with NTFS, but recently
    > got "Putty" for my Windows machine and am using the SCP client
    > {pscp} to transfer the files now.

    I think Windows (and hence Samba) shares are limited to 4GB because of
    the 32-bit file pointer issue (using an int rather than a off_t). On
    Linux, this limits programs to a 2GB file size, because it's a signed
    int (2^31 = 2G). On Windows, I think they treat it as an unsigned int
    (2^32 = 4G).

    Not all programs suffer from this--it depends on how they were built.
    Apache, for example, has this issue with its log files. Why they
    haven't fixed it yet, I don't know. It ain't rocket science.
    ----------------------------------------------------------------------
    - Rick Stevens, Senior Systems Engineer rstevens@vitalstream.com -
    - VitalStream, Inc. http://www.vitalstream.com -
    - -
    - Diplomacy: The art of saying "Nice doggy!" until you can find a -
    - big enough rock. -
    ---------------------------------------------------------------------- 

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