Hi,<br>please find the inlined comments.<br><br><div class="gmail_quote">On Wed, Apr 1, 2009 at 6:44 PM, Julien Cornuwel <span dir="ltr"><<a href="mailto:julien@cornuwel.net">julien@cornuwel.net</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi,<br>
<br>
I just discovered GlusterFS and it looks great ! I will definitely give<br>
it a try. Soon.<br>
In particular, the NUFA translator seems to meet my needs (use local<br>
resources as far as possible). I've read most of the documentation about<br>
NUFA but I still have some unanswered questions :<br>
<br>
- What happens if a node fills up its entire local storage ? Are new<br>
data transfered to another node ? Or does it crash ?</blockquote><div><br>New files will be created on another node. Writes to the files on already filled out nodes, return -1 with error code set to ENOSPC.<br><br></div>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>
- What about data protection ? As I understand it, if a node dies in a<br>
NUFA cluster, its files are gone with it ?</blockquote><div><br>Yes, with just NUFA setup, there can be data loss. You can protect from data loss by using replicate/afr xlator to replicate each child of NUFA.<br><br><br>
</div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><br>
<br>
On <a href="http://www.gluster.org/docs/index.php/GlusterFS_Roadmap_Suggestions" target="_blank">http://www.gluster.org/docs/index.php/GlusterFS_Roadmap_Suggestions</a><br>
Jshook say that in order to combine NUFA and afr functionnality, you<br>
just have to use afr with local volume name, and have read-subvolume<br>
option set to local volume. That's true in the case of a 2 nodes<br>
cluster, but in a 100 nodes cluster, you would still have the capacity<br>
of only 1 node, and 100 copies of each file. Am I right ?<br>
<br>
What would be great is to have the ability to create parity bricks :<br>
something like having 98 nodes in a NUFA cluster and 2 parity nodes that<br>
are just here in case a node (or two) went down. I saw that you had<br>
graid6 on your roadmap, so do you think that's possible ? And if so,<br>
when (approximately) ?<br>
<br>
Anyway, thanks for the work you made so far. I'll certainly be back<br>
annoying you when I'll start testing it ;-)<br>
<br>
Regards,<br>
<br>
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</blockquote></div><br><br clear="all"><br>-- <br>Raghavendra G<br><br>