<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Mar 9, 2017 at 11:10 AM, Kevin Lemonnier <span dir="ltr"><<a href="mailto:lemonnierk@ulrar.net" target="_blank">lemonnierk@ulrar.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><span class="gmail-">> I've seen the term sharding pop up on the list a number of times but I<br>
> haven't found any documentation or explanation of what it is. Would someone<br>
> please enlighten me?<br>
<br>
</span>It's a way to split the files you put on the volume. With a shard size of 64 MB<br>
for example, the biggest file on the volume will be 64 MB. It's transparent<br>
when accessing the files though, you can still of course write your 2 TB file<br>
and access it as usual.<br>
<br>
It's usefull for things like healing (only the shard being headed is locked,<br>
and you have a lot less data to transfert) and for things like hosting a single<br>
huge file that would be bigger than one of your replicas.<br>
<br>
We use it for VM disks, as it decreases heal times a lot.<br>
<span class="gmail-HOEnZb"><font color="#888888"><br></font></span></blockquote><div><br></div><div><br></div><div>Some more details on sharding can be found at [1].</div><div><br></div><div>Regards,<br></div><div>Vijay</div><div><br></div><div>[1] <a href="http://blog.gluster.org/2015/12/introducing-shard-translator/">http://blog.gluster.org/2015/12/introducing-shard-translator/</a></div></div></div></div>