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

[Anand Avati]

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