[Gluster-devel] glusterfs version3 and xen images
vikas at gluster.com
Tue Dec 15 07:16:27 UTC 2009
Roland Fischer wrote:
> i think the algorithms doesnt work yet. I read the pdf ->
> and this article is very interesting:
> The “Diff” algorithm is especially beneficial for situations such as
> running VM images,
> where self-heal of a recovering replicated copy of the image will
> occur much faster because
> only the changed blocks need to be synchronized.
> i use 12 GB (to 30GB) Xen Images and client side replication. If i
> simulate an Hardwareerror on glusterfsserver 1 and after 5 minutes the
> glusterfsserver 1 came back online, glusterfsserver2 starts sync but i
> think not with "diff" algotihm ether with full!! i see the sync if i
> do an iftop on both glusterfsserver.
> while syncing you cant do nothing in domU. no "df -h", no "ls" nothing
> - you can do nothing. if the iftop on both glusterfsserver has reached
> e.g. 12GB the domU works further.
> And thats the problem. in case of sync the domU must run further. This
> is our destination.
Thanks for all your input. We've been simulating the same situation
ourselves and we do
see that self-heal appears to be slow. We'll post an update on the bug
(bugzilla: 457) once we resolve the issue.
More information about the Gluster-devel