on 2/1/2008 4:33 PM Dean Maluski spake the following: > On Fri, 2008-02-01 at 16:11 -0800, nate wrote: >> Dean Maluski wrote: >>> I've googled this question without a great deal of information. >>> Of couse will be creating RAID0 swap but leaving that out of the >>> question for obvious reasons. >> You really should use anything but RAID 0 for swap. If you need >> to swap and that device is dead then your system is hosed. >> >> At one point I read that you can get RAID0-"like" performance >> by having multiple swap partitions on multiple devices and mounting >> them with the same priority(mount option pri=(some number)). It >> (was/is) supposed to stripe the swap partitions. Not sure if that >> ever worked, though I have configured systems over the years to >> use matching swap priorities, never really looked to see if it >> was doing what I expected though. >> >> Yeah, from swapon(2): >> [..] >> If two or more areas have the same priority, and it is the >> high-est priority available, pages are allocated on a >> round-robin basis between them. >> >> nate > OK, not really an answer to my hot spare question. > What I read sounds similar to what you state that if you create multiple > swap partions the system will create a raid0 of it. > So what is the recommendation? create 1 swap partition on one drive? It depends. If you are going to create LVM over the large raid5 partition you could put the swap there. Or you could create a raid 1 the same way you create the /boot partition. If the system is properly sized, swap is less of a performance issue anyway. -- MailScanner is like deodorant... You hope everybody uses it, and you notice quickly if they don't!!!! -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 187 bytes Desc: OpenPGP digital signature URL: <http://lists.centos.org/pipermail/centos/attachments/20080201/27475bc3/attachment-0004.sig>