<br><br><div class="gmail_quote">On Mon, Jun 29, 2009 at 11:37 PM, Mickey Mazarick <span dir="ltr"><<a href="mailto:mic@digitaltadpole.com">mic@digitaltadpole.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Have you seen a distributed parallel fault tolerant file system that doesn't take a serious hit doing mmaps or direct io?<br>
This is a serious question, I've installed luster to contrast recently and it didn't measure up but I'm wondering what other DPFT filers anyone has tried and for what applications?<br>
The wiki list is here: <a href="http://en.wikipedia.org/wiki/List_of_file_systems#Distributed_parallel_fault_tolerant_file_systems" target="_blank">http://en.wikipedia.org/wiki/List_of_file_systems#Distributed_parallel_fault_tolerant_file_systems</a></blockquote>
<div><br></div><div>This is a very interesting topic. I would also appreciate ML feedback on this.</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><a href="http://en.wikipedia.org/wiki/List_of_file_systems#Distributed_parallel_fault_tolerant_file_systems" target="_blank"></a><br>
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Can anyone give a positive or negative on any of these? Perhaps we can use some of the positives of others to drive gluster development.</blockquote><div><br></div><div>Well, it's not listed there and in fact I don't know if I could add this to that DPFT list, but on FreeBSD we have a interesting framework to handle Devices, GEOM: Modular Disk Transformation Framework [ <a href="http://www.freebsd.org/doc/en/books/handbook/geom.html">http://www.freebsd.org/doc/en/books/handbook/geom.html</a> ] above this I can add "geoms". In this Distributed scenario I can plan to have a base GEOM with a bunch of distributed disks agregated via GEOM GGATE and above that some RAID0 or so.</div>
<div>I have a very positive impressions about this. Friends are using this in production.</div><div><br></div><div>Francisco</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
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-Mic<div><div></div><div class="h5"><br>
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Nathan Stratton wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On Mon, 29 Jun 2009, Todd Daugherty wrote:<br>
<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
I have not used it in production yet but I did a test with:<br>
<a href="http://gluster.org/docs/index.php/Translators/cluster/stripe" target="_blank">http://gluster.org/docs/index.php/Translators/cluster/stripe</a><br>
<br>
That was quite nice across 8 servers for Quicktime files (average file 1GB).<br>
<br>
Why would you say no to Xen VM files?<br>
</blockquote>
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Because with xen you need to --disable-direct-io-mode to get it to work and that kills performance.<br>
<br>
Raw disk:<br>
8589934592 bytes (8.6 GB) copied, 21.0523 seconds, 408 MB/s<br>
<br>
Gluster:<br>
8589934592 bytes (8.6 GB) copied, 47.4356 seconds, 181 MB/s<br>
<br>
Gluster --disable-direct-io-mode<br>
8589934592 bytes (8.6 GB) copied, 336.514 seconds, 25.5 MB/<br>
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<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<><br>
</blockquote>
Nathan Stratton CTO, BlinkMind, Inc.<br>
nathan at <a href="http://robotics.net" target="_blank">robotics.net</a> nathan at <a href="http://blinkmind.com" target="_blank">blinkmind.com</a><br>
<a href="http://www.robotics.net" target="_blank">http://www.robotics.net</a> <a href="http://www.blinkmind.com" target="_blank">http://www.blinkmind.com</a><br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br>blog: <a href="http://sufixo.com/raw">http://sufixo.com/raw</a><br><a href="http://www.linkedin.com/in/franciscocabrita">http://www.linkedin.com/in/franciscocabrita</a><br>