<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div>I would say performance improvement is a long term work, we can't expect one patch to resolve all performance issues. If there's a chance to make a longer term comparison, for example, compare 2.2 with 2.0, I think there should be nice improvement, we can't say which one contribute the most because one patch/feature is supposed to resolve one issue and we can see overall improvement with many of them. </div><div><br></div><div>Regards</div><div>Liang</div><br><div><div>On May 1, 2012, at 4:48 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; ">Right, these are different things. But both were intended to be metadata improvements.<div>The pdirops results have been posted, but for actual files (e.g. with OST objects) the create/unlink rates didn't show much improvement.</div><div>I have not seen any measurements of 'ls -la' for any delivered features (although that doesn't mean they don't exist).</div><div><br></div><div>The question now is, do we as OpenSFS members want to continue to prioritize single-server MDS performance improvements? </div><div><br><div><br><div><div>On Apr 30, 2012, at 12:47 PM, Alex Tomas wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">hmm? pdirops is not supposed to improve directory listing, AFAIK.<div><br></div><div>thanks, Alex<br><br><div class="gmail_quote">On Mon, Apr 30, 2012 at 11:23 PM, Nathan Rutman <span dir="ltr"><<a href="mailto:Nathan_Rutman@xyratex.com" target="_blank">Nathan_Rutman@xyratex.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word">pdirops was delivered, but the improvement results were somewhat disappointing. I've seen no metrics for various directory listing improvements, although they may exist.<div>
Should we set a target rate? E.g. "ls -al" for a dir with 100K single-stripe files?</div><div><br><div><br><div><div><div class="h5"><div>On Apr 30, 2012, at 11:53 AM, John Carrier wrote:</div><br></div></div><blockquote type="cite">
<span style="border-collapse:separate;font-family:Helvetica;font-style:normal;font-variant:normal;font-weight:normal;letter-spacing:normal;line-height:normal;text-align:-webkit-auto;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;font-size:medium"><div lang="EN-US" link="blue" vlink="purple">
<div><div class="h5"><div><div style="margin-right:0in;margin-left:0in;font-size:12pt;font-family:'Times New Roman',serif;margin-top:0in;margin-bottom:0.0001pt"><span style="color:rgb(31,73,125)">Nathan adds a good question: metadata performance was the focus of our last RFP. Are there any performance targets not covered by our current development contract?</span></div>
<div style="margin-right:0in;margin-left:0in;font-size:12pt;font-family:'Times New Roman',serif;margin-top:0in;margin-bottom:0.0001pt"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></div>
<div style="margin-right:0in;margin-left:0in;font-size:12pt;font-family:'Times New Roman',serif;margin-top:0in;margin-bottom:0.0001pt"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">--jc<u></u><u></u></span></div>
<div style="margin-right:0in;margin-left:0in;font-size:12pt;font-family:'Times New Roman',serif;margin-top:0in;margin-bottom:0.0001pt"><span style="color:rgb(31,73,125)"><u></u> <u></u></span></div><div style="border-top-style:solid;border-right-style:solid;border-bottom-style:solid;border-left-style:solid;border-top-color:rgb(211,211,211);border-right-color:rgb(211,211,211);border-bottom-color:rgb(211,211,211);border-left-color:rgb(211,211,211);border-top-width:1pt;border-right-width:1pt;border-bottom-width:1pt;border-left-width:1pt;padding-top:0in;padding-right:0in;padding-bottom:0in;padding-left:0in">
<div style="border-top-style:none;border-right-style:none;border-left-style:none;border-width:initial;border-color:initial;border-bottom-style:solid;border-bottom-color:rgb(211,211,211);border-bottom-width:1pt;padding-top:0in;padding-right:0in;padding-bottom:13pt;padding-left:0in">
<div style="margin-right:0in;margin-left:0in;font-size:12pt;font-family:'Times New Roman',serif;margin-top:0in;margin-bottom:0.0001pt;line-height:15.75pt"><span style="font-size:14.5pt;font-family:Arial,sans-serif">Nathan Rutman added a comment to<span> </span><a href="https://docs.google.com/document/d/1gXs0VPaCNEU3l9OuXYmBCyxKEm3dkIV60smCVAD5Un8/edit?disco=AAAAAEv8ZFI" style="color:blue;text-decoration:underline" target="_blank"><span style="color:rgb(51,102,204);text-decoration:none">OpenSFS TWG Requirements 2012</span></a></span><span style="font-size:10pt;font-family:Arial,sans-serif"><u></u><u></u></span></div>
</div><div style="border-top-style:none;border-right-style:none;border-left-style:none;border-width:initial;border-color:initial;border-bottom-style:solid;border-bottom-color:rgb(211,211,211);border-bottom-width:1pt;padding-top:0in;padding-right:0in;padding-bottom:0.25in;padding-left:0in">
<div style="margin-bottom:0.25in"><table border="0" cellspacing="0" cellpadding="0" style="margin-left:3pt"><tbody><tr><td valign="top" style="padding-top:0in;padding-right:0in;padding-bottom:0in;padding-left:0in"><div><div style="margin-right:0in;margin-left:0in;font-size:12pt;font-family:'Times New Roman',serif;margin-top:0in;margin-bottom:0.0001pt">
<strong>Nathan Rutman</strong><u></u><u></u></div><div style="border-top-style:none;border-right-style:none;border-bottom-style:none;border-width:initial;border-color:initial;border-left-style:solid;border-left-color:rgb(211,211,211);border-left-width:1pt;padding-top:0in;padding-right:0in;padding-bottom:0in;padding-left:4pt;margin-top:7.5pt;margin-bottom:7.5pt">
<div style="margin-right:0in;margin-left:0in;font-size:12pt;font-family:'Times New Roman',serif;margin-top:0in;margin-bottom:0.0001pt"><span style="color:rgb(136,136,136)">Metadata server performance<u></u><u></u></span></div>
</div><div style="margin-right:0in;margin-left:0in;font-size:12pt;font-family:'Times New Roman',serif;margin-top:0in;margin-bottom:0.0001pt">Have we achieved the single-server MDS performance goals? Do we need to move some more solid requirements to 2012?<u></u><u></u></div>
</div></td></tr></tbody></table></div></div><div style="margin-right:0in;margin-left:0in;font-size:12pt;font-family:'Times New Roman',serif;margin-top:0in;margin-bottom:0.0001pt"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></div>
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