<div dir="ltr"><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Sep 4, 2019 at 1:18 AM Carl Sirotic <<a href="mailto:csirotic@gmail.com">csirotic@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">So,<br>
<br>
I am running 4.1.x and I started to use tiering.<br>
<br>
I ran in a load of problem where my email server would get kernel <br>
panick, starting 12 hours after the change.<br>
<br>
I am in the process of detaching the tier.<br>
<br>
I saw that in version 6, tier feature was completely removed.<br>
<br>
I am under the impression there was some bugs.<br>
<br></blockquote><div><br></div><div>That is -almost- correct. It is also true that there were issues in making it actually better performant, and someone to take care of it full time.</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
Is LVM Cache suposed to be a viable solution for nvme/ssd caching for <br>
sharded volume ?<br>
<br></blockquote><div><br></div><div>What we saw is dm-cache (ie, lvm cache) has actually performed better. Recommend you to try that for checking performance in your workload.</div><div><br></div><div>-Amar</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<br>
Carl<br>
<br>
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