On Mon, 2 Mar 2009, Paul Hieromnimon wrote:
If you replicate pairs of servers, how come you're still using RAID 6?
This is actually a very good question. So I guess their are 3 ways of doing this.
1) use JBOD and put a filesystem on each of the 16 drives and mount them on 16 points. However since gluster does not support RAID, to get redundancy I would need to unify 8 of the drives and distribute across the two sets. This would in my opinion waste a lot of disks.
2) use software RAID... the first issue is that hardware is now faster (at least with 3ware 9650SE cards). The second is that since my motherboard does not support 16 drives I would need a controller anyway, so why not use the free RAID?
3) Hardware RAID, the option I selected. The next question was RAID 5 or 6. With 16 drives I found that it makes a lot of sense to use RAID 6 since it is very easy to run into another error before I fix a disk.
I saw the note in the technical faq about --disable-direct-io-mode. What does this do, and why is it needed to perform Xen migration?
Not sure, would need to ask someone else, all I know is it takes me from over 100 MB/s to 22 MB/s. : (
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Nathan Stratton CTO, BlinkMind, Inc. nathan at robotics.net nathan at blinkmind.com http://www.robotics.net http://www.blinkmind.com _______________________________________________ Gluster-users mailing list Gluster-users@gluster.org http://zresearch.com/cgi-bin/mailman/listinfo/gluster-users
