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List: linux-lvm
Subject: [linux-lvm] LV striping
From: Liviu Dan <nliviudan () yahoo ! ca>
Date: 2007-04-16 18:03:42
Message-ID: 54501.10615.qm () web36108 ! mail ! mud ! yahoo ! com
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I hope this is the right way to post a message for the group.
I have 2 RAID 5 arrays each with 9 HDs (3ware 9550SX controllers). I have created \
a volume group and a LV to perform some write tests. I am currently able to write on \
the LV at approx 113MB/sec. I was hoping for something in the range of 400MB/sec \
considering the worse case scenario of a hard drive writing at 29MB/sec. The most \
confusing part for me is that I get the 113MB/sec when I create the LV with one \
stripe and I only get aprox. 60MB.sec when I create the LV with 2 stripes. From what \
I've been reading on the net, the LV should perform better when the number of stripes \
is equal with the number of physical volumes (2 in my case). Has anyone encountered \
similar issues?
I would appreciate any suggestions/answers.
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<DIV>I hope this is the right way to post a message for the group.</DIV> \
<DIV> </DIV> <DIV>I have 2 RAID 5 arrays each with 9 HDs (3ware 9550SX \
controllers). I have created a volume group and a LV to perform some write \
tests. I am currently able to write on the LV at approx 113MB/sec. I was \
hoping for something in the range of 400MB/sec considering the worse case scenario of \
a hard drive writing at 29MB/sec. The most confusing part for me is that I get \
the 113MB/sec when I create the LV with one stripe and I only get aprox. 60MB.sec \
when I create the LV with 2 stripes. From what I've been reading on the net, \
the LV should perform better when the number of stripes is equal with the number of \
physical volumes (2 in my case). Has anyone encountered similar issues?</DIV> \
<DIV> </DIV> <DIV>I would appreciate any \
suggestions/answers.</DIV><p> 
<hr size=1><a href="http://us.rd.yahoo.com/evt=40705/*http://mrd.mail.yahoo.com/try_beta?.intl=ca"><b>All \
new Yahoo! Mail </b></a> <hr size=1>Get news delivered. Enjoy RSS feeds right on \
your Mail page.
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