<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;">Stick your bricks on ZFS and let it do it for you. Works well, although I haven’t done much benchmarking of it. My test setup is described in the thread under [Users] Creation of preallocated disk with Gluster replication. I’ve seen some blog posts here and there about gluster on ZFS for this reason too.<div><br></div><div> -Darrell<br><div><br><div><div>On Jan 7, 2014, at 9:56 PM, Russell Purinton <<a href="mailto:russ@sonicbx.com">russ@sonicbx.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Verdana;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri","sans-serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri","sans-serif";
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri","sans-serif";}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
<div lang="EN-US" link="#0563C1" vlink="#954F72">
<div class="WordSection1"><p class="MsoNormal" style="margin-left:10.0pt;text-indent:-10.0pt;text-autospace:none">
<span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:gray;background:white;mso-highlight:white">[20:42]
</span><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:navy;background:white;mso-highlight:white"><sonicrose> is anybody out there using a good RAM+SSD caching system ahead of gluster storage?<o:p></o:p></span></p><p class="MsoNormal" style="margin-left:10.0pt;text-indent:-10.0pt;text-autospace:none">
<span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:gray;background:white;mso-highlight:white">[20:42]
</span><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:navy;background:white;mso-highlight:white"><sonicrose> sorry if that came through twice<o:p></o:p></span></p><p class="MsoNormal" style="margin-left:10.0pt;text-indent:-10.0pt;text-autospace:none">
<span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:gray;background:white;mso-highlight:white">[20:44]
</span><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:navy;background:white;mso-highlight:white"><sonicrose> im thinking about making the SSD one giant swap file then creating a very large ramdisk in virtual memory and using that as a
block level cache for parts and pieces of virtual machine disk images<o:p></o:p></span></p><p class="MsoNormal" style="margin-left:10.0pt;text-indent:-10.0pt;text-autospace:none">
<span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:gray;background:white;mso-highlight:white">[20:44]
</span><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:navy;background:white;mso-highlight:white"><sonicrose> then i think the memory managers would inherently play the role of storage tiering ie: keeping the hottest data in memory and
the coldest data on swap<o:p></o:p></span></p><p class="MsoNormal" style="margin-left:10.0pt;text-indent:-10.0pt;text-autospace:none">
<span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:gray;background:white;mso-highlight:white">[20:45]
</span><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:navy;background:white;mso-highlight:white"><sonicrose> everything i have seen today has been setup as "consumer" ===> network ====> SSD cache ====> real disks<o:p></o:p></span></p><p class="MsoNormal" style="margin-left:10.0pt;text-indent:-10.0pt;text-autospace:none">
<span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:gray;background:white;mso-highlight:white">[20:45]
</span><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:navy;background:white;mso-highlight:white"><sonicrose> but i'd like to actually do "consumer" ===> RAM+SSD cache ===> network ===> real disks<o:p></o:p></span></p><p class="MsoNormal" style="margin-left:10.0pt;text-indent:-10.0pt;text-autospace:none">
<span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:gray;background:white;mso-highlight:white">[20:46]
</span><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:navy;background:white;mso-highlight:white"><sonicrose> i realize doing a virtual memory disk means the cache will be cleared on every reboot, and I'm ok with that<o:p></o:p></span></p><p class="MsoNormal" style="margin-left:10.0pt;text-indent:-10.0pt;text-autospace:none">
<span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:gray;background:white;mso-highlight:white">[20:47]
</span><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:navy;background:white;mso-highlight:white"><sonicrose> i know this can be done with NFS and cachefilesd(fscache), but how could something be integrated into the native gluster clients?<o:p></o:p></span></p><p class="MsoNormal" style="margin-left:10.0pt;text-indent:-10.0pt;text-autospace:none">
<span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:gray;background:white;mso-highlight:white">[20:47]
</span><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:navy;background:white;mso-highlight:white"><sonicrose> i'd prefer not to have to access gluster via NFS<o:p></o:p></span></p><p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:gray;background:white;mso-highlight:white">[20:49]
</span><span style="font-size:9.0pt;font-family:"Verdana","sans-serif";color:navy;background:white;mso-highlight:white"><sonicrose> any feedback from this room is greatly appreciated, getting someone started to build managed HA cloud hosting</span><o:p></o:p></p>
</div>
</div>
_______________________________________________<br>Users mailing list<br><a href="mailto:Users@ovirt.org">Users@ovirt.org</a><br>http://lists.ovirt.org/mailman/listinfo/users<br></blockquote></div><br></div></div></body></html>