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<DIV><FONT color=#000080 size=2 face=Verdana>Hi, Andreas</FONT></DIV>
<DIV><FONT color=#000080></FONT> </DIV>
<DIV><FONT color=#000080>Thanks so much to you. The variables of our filesystem
as follow:</FONT></DIV>
<DIV><FONT color=#000080></FONT> </DIV>
<DIV><FONT color=#000080>size of the filesystem: 400TB</FONT></DIV>
<DIV><FONT color=#000080>number of inodes: 427220992 (set as the default
inode size 256)</FONT></DIV>
<DIV><FONT color=#000080>number of allocated blocks:1708867323 (set as the
default block size 4096)</FONT></DIV>
<DIV><FONT color=#000080>distribution of the above on the disk: 4 OSTs on one
disk</FONT></DIV>
<DIV><FONT color=#000080>amount of RAM on server: 16GB</FONT></DIV>
<DIV><FONT color=#000080>speed of the CPU: Intel(R) Core 8 CPU</FONT></DIV>
<DIV><FONT color=#000080>speed of the disks:7200</FONT></DIV>
<DIV><FONT color=#000080></FONT> </DIV>
<DIV><FONT color=#000080>Can you give us the more details according to the
parameters? And give us some suggestions to do e2fsck or make it do faster. We
are worried about it may destroy the filesystem.</FONT></DIV>
<DIV><FONT color=#000080></FONT> </DIV>
<DIV><FONT color=#000080>Thank you in advanced for your help!</FONT></DIV>
<DIV><FONT color=#000080></FONT> </DIV>
<DIV><FONT color=#000080>thanks,</FONT></DIV>
<DIV><FONT color=#000080>Sarea</FONT></DIV>
<DIV><FONT color=#000080 size=2 face=Verdana></FONT> </DIV>
<DIV><FONT color=#c0c0c0 size=2 face=Verdana>2009-07-30 </FONT></DIV><FONT
color=#000080 size=2 face=Verdana>
<HR style="WIDTH: 100px" align=left color=#b5c4df SIZE=1>
</FONT>
<DIV><FONT color=#c0c0c0 size=2 face=Verdana><SPAN>huangql</SPAN> </FONT></DIV>
<HR color=#b5c4df SIZE=1>
<DIV><FONT size=2 face=Verdana><STRONG>发件人：</STRONG> Andreas Dilger
</FONT></DIV>
<DIV><FONT size=2 face=Verdana><STRONG>发送时间：</STRONG> 2009-07-29 18:33:13
</FONT></DIV>
<DIV><FONT size=2 face=Verdana><STRONG>收件人：</STRONG> huangql </FONT></DIV>
<DIV><FONT size=2 face=Verdana><STRONG>抄送：</STRONG> lustre-discuss </FONT></DIV>
<DIV><FONT size=2 face=Verdana><STRONG>主题：</STRONG> Re: [Lustre-discuss] How to
estimate the time for e2fsck on OST </FONT></DIV>
<DIV><FONT size=2 face=Verdana></FONT> </DIV>
<DIV><FONT size=2 face=Verdana>
<DIV>On Jul 29, 2009 15:16 +0800, huangql wrote:</DIV>
<DIV>> We want to run e2fsck on OSTs to finish them. However, as to the</DIV>
<DIV>> running time, we should estimate how long it takes to run e2fsck on</DIV>
<DIV>> OSTs. We hopefully to know what elements to affect the running time like</DIV>
<DIV>> the size of OST, the average size of files and so on. Can you give us</DIV>
<DIV>> the tips for it? And I hope to receive you email as soon as possible.</DIV>
<DIV></DIV>
<DIV>The variables in your question are numerous:</DIV>
<DIV>- size of the filesystem</DIV>
<DIV>- number of inodes</DIV>
<DIV>- number of allocated blocks</DIV>
<DIV>- distribution of the above on the disk</DIV>
<DIV>- speed of the disks</DIV>
<DIV>- speed of the CPU</DIV>
<DIV>- amount of RAM on server</DIV>
<DIV></DIV>
<DIV>Reasonable e2fsck times (without serious filesystem problems) might</DIV>
<DIV>take between 5 minutes and 2 hours.</DIV>
<DIV></DIV>
<DIV>Cheers, Andreas</DIV>
<DIV>--</DIV>
<DIV>Andreas Dilger</DIV>
<DIV>Sr. Staff Engineer, Lustre Group</DIV>
<DIV>Sun Microsystems of Canada, Inc.</DIV>
<DIV></DIV>
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