[Gluster-devel] GlusterFs: Problems with Memory Mapped Files and "apt-get" on debian

[Anand Avati]

Urban,
  can you please mention the fuse version (kernel-fuse and libfuse
both)? you can find with "dmesg|grep fuse" and output something like
---
fuse init (API version 7.8)
fuse distribution version: 2.6.0
---

thanks,
avati

2007/5/21, Urban Loesch <ul at enas.net>:
> Hi Avati,
>
> thanks. I tried out the latest 2.4 tla. But there is still the same error.
>
> mastersql:/# apt-get update
> Get:1 http://security.debian.org etch/updates Release.gpg [189B]
> Get:2 http://security.debian.org etch/updates Release [22.5kB]
> Ign http://security.debian.org etch/updates/main Packages/DiffIndex
> Ign http://security.debian.org etch/updates/contrib Packages/DiffIndex
> Ign http://security.debian.org etch/updates/non-free Packages/DiffIndex
> Get:3 http://security.debian.org etch/updates/main Packages [71.6kB]
> Hit http://security.debian.org etch/updates/contrib Packages
> Hit http://security.debian.org etch/updates/non-free
> Packages
> Get:4 http://ftp.de.debian.org etch Release.gpg
> [378B]
>
> Hit http://ftp.de.debian.org etch
> Release
>
> Ign http://ftp.de.debian.org etch/main
> Packages/DiffIndex
>
> Ign http://ftp.de.debian.org etch/contrib
> Packages/DiffIndex
>
> Ign http://ftp.de.debian.org etch/non-free
> Packages/DiffIndex
>
> Hit http://ftp.de.debian.org etch/main
> Packages
>
> Hit http://ftp.de.debian.org etch/contrib
> Packages
>
> Hit http://ftp.de.debian.org etch/non-free
> Packages
>
> Fetched 94.2kB in 9s
> (9525B/s)
>
> Reading package lists... Error!
> E: Couldn't make mmap of 12582912 bytes - mmap (19 No such device)
> W: Unable to munmap
> E: The package lists or status file could not be parsed or opened.
> mastersql:/# apt-cache search
> E: Couldn't make mmap of 12582912 bytes - mmap (19 No such device)
> W: Unable to munmap
>
> I made an strace of apt-get. The result you can find on the links below.
> Hope that will help.
>
> http://www.enas.net/glusterfs/apt-get-update.txt
> http://www.enas.net/glusterfs/apt-cache.txt
>
> Thanks
> Urban
>
>
>
>
> Anand Avati wrote:
> > Urban,
> >  I've made some changes related to the way  mmap files are handled,
> > can you please check with the latest TLA (glusterfs--mainline--2.4)
> >
> > thanks
> > avati
> >
> > 2007/5/15, Urban Loesch <ul at enas.net>:
> >> Hi,
> >>
> >> I have a problem with "mmap" on my GlusterFs test environment and "apt"
> >> on Debian.
> >>
> >> My environment:
> >> Hardware:
> >> 2 different servers for storage
> >> 1 server as client
> >> On top of the server I use a virtual server setup (details
> >> http://linux-vserver.org).
> >>
> >> OS:
> >> Debian Sarge with self compiled 2.6.19.2 (uname -r 2.6.19.2-vs2.2.0) and
> >> latest stable virtual server patch.
> >> GlusterFs: latest mainline 2.4 from repository
> >>
> >> What I'm trying to do:
> >> - Create a AFR Mirror over the 2 Servers.
> >> - Mount the Volume on Server 3 (Client).
> >> - Install on the mounted volume the hole virtual Server with Apache,
> >> MySql and so on.
> >> So I have a full redundant Virtual Server mirrored over two bricks .
> >>
> >> After some help from Avati Anand last week the above setup works just
> >> fine. I tried out Mysql and it works normally (will make some more tests
> >> in the future).
> >>
> >> But now I have the problem with apt.
> >> For example when I try to update the packagelists within the virtual
> >> server I get the following error:
> >> mastersql:/# apt-get update
> >> Get:1 http://security.debian.org etch/updates Release.gpg
> >> [189B]
> >> ...                                                       Hit
> >> http://ftp.de.debian.org etch/non-free
> >> Packages
> >>
> >>
> >> Fetched 2B in 7s
> >> (0B/s)
> >>
> >> Reading package lists... Error!
> >> E: Couldn't make mmap of 12582912 bytes - mmap (19 No such device)
> >> W: Unable to munmap
> >> E: The package lists or status file could not be parsed or opened.
> >>
> >> After some googling I found out, that apt uses "memory mapped files" and
> >> it seems that apt can't find some device.
> >> But I'm not able to find out which device does it can't find.
> >>
> >> Short description of MMAP:
> >> http://www.ecst.csuchico.edu/~beej/guide/ipc/mmap.html
> >>
> >> Have you any idea what can cause this problem? Without GlusterFs as the
> >> underlaying filesystem the problems not occurs.
> >>
> >> thanks
> >> Urban Loesch
> >>
> >>
> >> _______________________________________________
> >> Gluster-devel mailing list
> >> Gluster-devel at nongnu.org
> >> http://lists.nongnu.org/mailman/listinfo/gluster-devel
> >>
> >
> >
>
>


-- 
Anand V. Avati