Hi guys, I won’t do a RAID 1 with SSDs since they both write the same data. Thus, they are more likely to “almost” die at the same time.
What I will try to do instead is to use both disk in JBOD mode or (degraded RAID0). Then I will create a tiny root partition for the OS. Then I’ll still have something like /dev/sda2 and /dev/sdb2 and then I can take advantage of the 2 disks independently. The good thing with that is that you can balance your journals across both SSDs. From a performance perspective this is really good. The bad thing as always is that if you loose a SSD you loose all the journals attached to it. Cheers. –––– Sébastien Han Cloud Engineer "Always give 100%. Unless you're giving blood.” Phone: +33 (0)1 49 70 99 72 Mail: sebastien....@enovance.com Address : 10, rue de la Victoire - 75009 Paris Web : www.enovance.com - Twitter : @enovance On 05 Dec 2013, at 10:53, Gandalf Corvotempesta <gandalf.corvotempe...@gmail.com> wrote: > 2013/12/4 Simon Leinen <simon.lei...@switch.ch>: >> I think this is a fine configuration - you won't be writing to the root >> partition too much, outside journals. We also put journals on the same >> SSDs as root partitions (not that we're very ambitious about >> performance...). > > Do you suggest a RAID1 for the OS partitions on SSDs ? Is this safe or > a RAID1 will decrease SSD life? > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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