Hi,
For backup; I'm assuming you'd like to have exactly the same FS on another mount point, try rsync. First time only will be slower as you're backing up everything, then the rest shall be incremental (rsyinc will process the delta only); you could use the -av option. For the second issue, slow copy; try to ftp instead (internally, on the same host; ssh to the other lan then ftp get, dummy workaround, but works sometimes, and normally faster than the standard cp). Hope that help Best regards, Karim Alkhayer From: ocfs2-users-boun...@oss.oracle.com [mailto:ocfs2-users-boun...@oss.oracle.com] On Behalf Of Elia Pinto Sent: Sunday, May 02, 2010 2:53 PM To: Giovanni Sciortino Cc: ocfs2-users@oss.oracle.com Subject: Re: [Ocfs2-users] backup performance problem and snapshot 2010/4/22 Giovanni Sciortino <giovannibattistasciort...@gmail.com> Hi, 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. 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. 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. 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. Has anyone got a similar performance problems with OCFS clusters or some suggestions in order to solve this problem? Does OCFS provide a snapshot feature in order to backup quickly the OCFS filesystem? 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. But probably there is no interest. Regards Giovanni Sciortino _______________________________________________ Ocfs2-users mailing list Ocfs2-users@oss.oracle.com http://oss.oracle.com/mailman/listinfo/ocfs2-users
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