On 29 August 2011 00:06, Stuart Burns <span dir="ltr"><<a href="mailto:stuart.james.burns@gmail.com">stuart.james.burns@gmail.com</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
HIya,<br><br>I did actually change from blockio to fileio and that brought the speed issue under better control.<br><br>Just before you posted I am moving my important vms from the san to local storage. At that point I am going to blow away the SAN and reinstall it with Nexenta. <br>
<br>To reduce the overhead I am tempted to try NFS also.<br><br>It will take about several hours to copy the 500 GB vm image across.<br><br>What is interesting is that Nextenta actually mention this box as a soho san, but when you have your DC, VCenter and additional VM, the IO seems to swamp the processor. I can only think it may be the linux software raid.<br>
<br>I did try the onboard raid, but Linux ignored it completely ;). Tried it on basis that hardware raid (or hardware assisted raid) may reduce IO commands on processor.<br></blockquote><div><br></div><div>Ah yes, I've come across plenty of those! Sort of a software on hardware raid!</div>
<div><br></div><div>You can also give FreeNAS a go, that will do ZFS and iSCSI, however they're not as closely linked as the iSCSI isn't part of their ZFS implementation. Nexenta also offers all the de-dupe & compression options.</div>
<div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><br>Anyhows, will report back.....<div><div></div><div class="h5"><br><br> <br><br>
<div class="gmail_quote">On 28 August 2011 23:28, Thomas Prophett <span dir="ltr"><<a href="mailto:thomas@thomasprophett.co.uk" target="_blank">thomas@thomasprophett.co.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi Stuart,<div><br></div><div>I'm using the community edition of nexentastor 3.1.1 & its currently connected to a ESXi cluster via iSCSI. The "community" edition has a few limitations around iSCSI but it works fine for a Lab.</div>
<div><br></div><div>In theory you should see adequate read performance with 8GB ram coupled with the zfs adaptive read cache. </div><div><br></div><div>I guess just try it and see, load 3.1.1 & bonnie.</div><div><br>
</div>
<div>All the best,</div><div><br></div><font color="#888888"><div>Thomas.</div></font><div><div></div><div><div><br><div class="gmail_quote">On 28 August 2011 19:58, Les Pritchard <span dir="ltr"><<a href="mailto:les.pritchard@gmail.com" target="_blank">les.pritchard@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Ah yes, now I remember!<div><br></div><div>I've double checked and the community edition does offer iSCSI (and fibre if you wish!). A quick look online I see a few results showing Nexenta is faster than OpenFiler on the iSCSI. After all it is ZFS under the hood, so it's professional level from the ground up.</div>
<div><br></div><div>Nexenta (and any ZFS based systems) recommend you don't use hardware raid so you won't be missing anything by not having a card.<div><div></div><div><br><br><div class="gmail_quote">
On 28 August 2011 19:49, Stuart Burns <span dir="ltr"><<a href="mailto:stuart.james.burns@gmail.com" target="_blank">stuart.james.burns@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">I didn't think Nexenta did ISCSI. <br><br>This box has 8 GB ram also, so I think just cpu is letting it down. Shame really. Speeds are terrible. <br>
<br><div class="gmail_quote"><div><div></div><div>On 28 August 2011 19:47, Les Pritchard <span dir="ltr"><<a href="mailto:les.pritchard@gmail.com" target="_blank">les.pritchard@gmail.com</a>></span> wrote:<br>
</div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div></div><div><p>What was the reason you're not able to use Nexenta? You did mention something but I can't remember!</p>
<p>Would be interesting to see how it would compare in speed.</p><div><div></div><div>
<div class="gmail_quote">On Aug 28, 2011 6:18 PM, "Stuart Burns" <<a href="mailto:stuart.james.burns@gmail.com" target="_blank">stuart.james.burns@gmail.com</a>> wrote:<br type="attribution">> Hi Everyone,<br>
> <br>
> After ramming my little Proliant N36L full of Disks (8 TB total) and using<br>> it as an ISCSI target on Openfiler, the performance when using SW raid is<br>> absolutely appalling. My CPU load is 4.5+ (when running 3 vms with little<br>
> traffic)<br>> <br>> I suspect the 2 * 1.3 GHz CPUs are just not up to the job.<br>> <br>> Therefore, I am wondering, either new box with Openfler or an ISCSI drobo or<br>> similar. Anyone got any recommendations.<br>
> <br>> Stu<br>> <br>> <br>> -- <br>> Stuart Burns<br>> E: <a href="mailto:stuart.james.burns@gmail.com" target="_blank">stuart.james.burns@gmail.com</a><br>> M: [redacted]<br></div>
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