<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Thanks Oleg.<div>cc'ing lustre-devel<br><div><br><div><div>On Aug 24, 2011, at 11:22 AM, Oleg Drokin wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>Increasing number of dirs is fine by me, but it has implications for upgrading and downgrading.<br>For example I think number of dirs is really hardcoded everywhere instead of using value in server data.<br>Also if you want to change the value on existing OST, we need a rehash functionality,<br>and then using older releases on such filesystems would lead to corruptions which also needs to be avoided somehow.</div></blockquote><br></div></div><div><br></div><div><div>On Aug 24, 2011, at 11:06 AM, Nathan Rutman wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><blockquote class="webkit-indent-blockquote" style="margin: 0 0 0 40px; border: none; padding: 0px;"><div style="text-align: left;"><span class="Apple-style-span" style="font-family: arial, FreeSans, Helvetica, sans-serif; font-size: 14px; line-height: 20px; ">currently we have to use 32 directories for object in OST. but for large scale OST it isn't enough. </span></div><span class="Apple-style-span" style="font-family: arial, FreeSans, Helvetica, sans-serif; font-size: 14px; line-height: 20px; ">so we need to able to extend that number to ~1024 or more.</span></blockquote><blockquote class="webkit-indent-blockquote" style="margin: 0 0 0 40px; border: none; padding: 0px;"><span class="Apple-style-span" style="font-family: arial, FreeSans, Helvetica, sans-serif; font-size: 14px; line-height: 20px; "><br></span></blockquote><span class="Apple-style-span" style="font-family: arial, FreeSans, Helvetica, sans-serif; font-size: 14px; line-height: 20px; ">This was brought up at LUG (presentation attached below) and my recollection is that Oleg had some strong opinions on this -- maybe not increasing the number of dirs but certainly on any locking changes. Oleg -- did you have any objection to increasing the number of object directories?</span><div><font class="Apple-style-span" face="arial, FreeSans, Helvetica, sans-serif" size="4"><span class="Apple-style-span" style="line-height: 20px;"><br></span></font></div><div><font class="Apple-style-span" face="arial, FreeSans, Helvetica, sans-serif" size="4"><span class="Apple-style-span" style="line-height: 20px;"><a href="http://www.olcf.ornl.gov/wp-content/events/lug2011/4-13-2011/130-200_Ben_Evans_LUG-2011_Ben_Evans_V3.pptx">130-200_Ben_Evans_LUG ... - OLCF.ORNL.GOV</a><br></span></font><div><font class="Apple-style-span" face="arial, FreeSans, Helvetica, sans-serif" size="4"><span class="Apple-style-span" style="line-height: 20px; "><br></span></font><div><br></div></div></div></div></blockquote></div><br></div></body></html>
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