<div class="gmail_quote">2010/4/22 Giovanni Sciortino <span dir="ltr"><<a href="mailto:giovannibattistasciortino@gmail.com">giovannibattistasciortino@gmail.com</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi,<br>i'm using ocfs2-1.4.4-1 on a cluster of 16 nodes, each node uses rhel 5.4 (kernel version 2.6.18-164.11.1) and it's connected to the other nodes with a 10Gb/s Ethernet.<br>The ocfs cluster contains a Ocfs filesystem of 3 terabyte over a LVM logic volume, I use this filesystem to store the home directories of users.<br>
I need to backup this filesystem but there is a very low transfer rate(it's about 4MB/s) from the OCFS fs and the tape, i try to copy the data from OCFS fs to a ext3 using cp and I obtain similar transfer rates.<br>
I use also another ocfs cluster of only two nodes in an another vlan of the same network and I obtain a transfer rate from OCFS fylesystem to other fylestem of 20 MB/s.<br>
<br>Has anyone got a similar performance problems with OCFS clusters or some suggestions in order to solve this problem?<br><br>Does OCFS provide a snapshot feature in order to backup quickly the OCFS filesystem?<br><font color="#888888"><br>
</font></blockquote><div>He, this is a good question. But none answer, and not because it is a simple question IMHO that could be require as an answer a simple RTFM. BTW, in other distributed filesystem there exist a "freeze" function for doing something as you asked, if also using something like a snapshot lvm or hardware support, as you have observed already.<br>
<br>But probably there is no interest. <br><br>Regards <br></div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><font color="#888888">Giovanni Sciortino<br>
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