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

[Urban Loesch]

Ups sorry, forgot to send the answer to the hole list!
Here comes the answer.

...

Hi Avati,

the fuse version is:

drbdtest03:~# dmesg |grep fuse
fuse init (API version 7.7)

on all of the three testservers.
The installed packages are:

drbdtest03:~# dpkg -l |grep fuse
ii  fuse-utils                              
2.6.3-2                         Filesystem in USErspace (utilities)
ii  libfuse-dev                             
2.6.3-2                         Filesystem in USErspace (development files)
ii  libfuse2                                
2.6.3-2                         Filesystem in USErspace library

thanks,
Urban


Anand Avati wrote:
> 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 <address@hidden>:
> > 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 <address@hidden>:
> > >> 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
> > >> address@hidden
> > >> http://lists.nongnu.org/mailman/listinfo/gluster-devel
> > >>
> > >
> > >