[Gluster-devel] Is this a bug?

[Krishna Srinivas]

Brandon,

It is a bug, it shall be fixed soon.

Thanks
Krishna

On Tue, May 6, 2008 at 10:25 AM, Brandon Lamb <brandonlamb at gmail.com> wrote:
> 2 server using afr (client side afr), 1 client
>
>  1) 10 file[0-9].tar.bz2 @ 45M on /mnt/raid/gfs on server1
>  2) scp file* on server1 to /mnt/raid/gfs on server2
>  3) on server1 find /mnt/raid/gfs -exec setfattr
>  trusted.glusterfs.version -v 1 {} \;
>  4) on server1 find /mnt/raid/gfs -exec setfattr
>  trusted.glusterfs.created -v 1210048518 {} \;
>  5) on server2 find /mnt/raid/gfs -exec setfattr
>  trusted.glusterfs.version -v 1 {} \;
>  6) on server2 find /mnt/raid/gfs -exec setfattr
>  trusted.glusterfs.createtime -v 1210048518 {} \;
>
>  Ok so at this point i have two copies of identical data on both
>  servers, and i manually set both of the xattr on all files on BOTH
>  servers to be the same.
>
>  7) start glusterfsd on server1, but NOT on server2
>  8) on client mount /mnt/gfs
>  9) cd /mnt/gfs
>  10) > file0.tar.bz2 (truncate? set to null?)
>  11) echo "" > file9.tar.bz2
>
>  Ok here I > file0 and echo a blank string to file9. When I perform ls
>  -l on file0.tar.bz2 is shows 0, on file9.tar.bz2 it shows 1. Remember
>  that at this point over on server2 both of these files are still 45
>  megs each.
>
>  12) start glusterfsd on server2
>  13) head -c 1 file9.tar.bz2, the 1 byte? file is copied to server1
>  14) head -c 1 file file1.tar.bz2, it does not update server2!
>  14) cat file0.tar.bz2, it does not update server2!
>
>  Apparently if you do "> filename" the afr translator does not understand this?
>
>  15) echo "" >> file0.tar.bz2, server1 updates with 1 byte, server2
>  still says 45 megs!
>  16) ls -al on client, now file0.tar.bz2 on the client shows as 45
>  megs, server1 reports 1 byte, server2 still says 45 megs
>  17) echo "" > file0.tar.bz2, all is well, both servers now have a 1 byte file
>
>
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