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We have a couple of machines with all SSD pool (~6-10 Samsung 850
pro is the current favorite). They work great for IOPS. Here's my
take.<br>
1) you don't need a dedicated zil. Just let the zpool intersperse it
amongst the existing zpool devices. They are plenty fast enough.<br>
2) you don't need an L2arc for the same reason. a smaller number of
dedicated devices would likely cause more of a bottleneck than
serving off the existing pool devices (unless you were to put it on
one of those giant RDRAM things or similar, but that adds a lot of
expense)<br>
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<div class="moz-cite-prefix">On 4/4/2015 3:07 PM, Chris Nagele
wrote:<br>
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<blockquote
cite="mid:CAHfYOdU=8+i4c-YScOp_u6-gyACT5n67dbDt5gf+pNPgXywtbA@mail.gmail.com"
type="cite"><font><span
style="background-color:rgba(255,255,255,0)">We've been
running a few 4U Supermicro servers using ZeusRAM for zil and
SSDs for L2. The main disks are regular 1TB SAS. <br>
<br>
</span></font>
<div><font><span style="background-color:rgba(255,255,255,0)">I'm
considering moving to all SSD since the pricing has dropped
so much. What things should I know or do when moving to all
SSD pools? I'm assuming I don't need L2 and that I should
keep the ZeusRAM. Should I only use certain types of SSDs? </span></font></div>
<div><font><span style="background-color:rgba(255,255,255,0)"><br>
</span></font></div>
<div><font><span style="background-color:rgba(255,255,255,0)">Thanks,</span></font></div>
<div><font><span style="background-color:rgba(255,255,255,0)">Chris</span></font></div>
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<div><font color="#000000">Chris Nagele</font></div>
<div><font color="#000000">Co-founder,</font><font
color="#888888"> </font><font color="#000000"><a
moz-do-not-send="true" href="http://wildbit.com/"
style="color:rgb(17,85,204)" target="_blank">Wildbit</a></font></div>
<div>
<div style="color:rgb(136,136,136)"><a moz-do-not-send="true"
href="http://beanstalkapp.com/"
style="color:rgb(17,85,204)" target="_blank">Beanstalk</a>, <a
moz-do-not-send="true" href="http://postmarkapp.com/"
style="color:rgb(17,85,204)" target="_blank">Postmark</a>, <a
moz-do-not-send="true" href="http://dploy.io/"
style="color:rgb(17,85,204)" target="_blank">dploy.io</a></div>
</div>
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<br>
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