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<div class="moz-cite-prefix">On 12/22/2015 10:33 AM, Tejas Rao
wrote:<br>
</div>
<blockquote cite="mid:5678B693.40907@bnl.gov" type="cite">On
12/21/2015 20:50, Aaron Knister wrote:
<br>
<br>
</blockquote>
[...]<br>
<blockquote cite="mid:5678B693.40907@bnl.gov" type="cite">
<blockquote type="cite">
<br>
I'm curious now, Redhat doesn't support SW raid failover? I did
some
<br>
googling and found this:
<br>
<br>
<a class="moz-txt-link-freetext" href="https://access.redhat.com/solutions/231643">https://access.redhat.com/solutions/231643</a>
<br>
<br>
While I can't read the solution I have to figure that they're
now
<br>
supporting that. I might actually explore that for this project.
<br>
</blockquote>
<a class="moz-txt-link-freetext" href="https://access.redhat.com/solutions/410203">https://access.redhat.com/solutions/410203</a>
<br>
This article states that md raid is not supported in RHEL6/7 under
any circumstances, including active/passive modes.
<br>
</blockquote>
<br>
OCFS2 or GFS2(same for GPFS, as the shared filesystem) over a shared
storage is a typical Cluster configuration for Linux High
Availability. Where, Clustered LVM (cLVM) is supported by both SUSE
and Redhat to do mirroring to protect the data. However, the
performance loss is very big and make people not so happy about this
clustered mirror solution. This is where the motivation for
clustered MD solution comes from. <br>
<br>
With clustered md, this new solution could provide nearly the same
performance as the native raid1. You may have interest to validate
this from your lab with your configuration;)<br>
<br>
Cheers,<br>
Roger<br>
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