Don't feel intimidated by what you don't know. Ask your question anonymously. It's easy! Learn more and upgrade.
There's no reason to use RAID for swap performance reasons. The kernel itself can stripe swapping on several devices, if you just give them the same priority in the /etc/fstab file.Sounds like I don't need my swap partitions inside a RAID. But then in the very next paragraph he says,
A nice /etc/fstab looks like:
/dev/sda2 swap swap defaults,pri=1 0 0
/dev/sdb2 swap swap defaults,pri=1 0 0
/dev/sdg2 swap swap defaults,pri=1 0 0
This setup lets the machine swap in parallel on seven SCSI devices. No need for RAID, since this has been a kernel feature for a long time.
Another reason to use RAID for swap is high availability. If you set up a system to boot on eg. a RAID-1 device, the system should be able to survive a disk crash. But if the system has been swapping on the now faulty device, you will for sure be going down. Swapping on a RAID-1 device would solve this problem.Is this contradicting he immediate preceding statement or am I just not reading something right? Which way is he recommending? Are non-RAID swap partitions a good thing or a bad thing?
Add your voice to the tech community where 5M+ people just like you are talking about what matters.
Join the community of 500,000 technology professionals and ask your questions.