1

I am setting up a small (1 user) email server. So far I have put in 2 x 1TB WD Red drives and set them up for LVM with RAID1 mirrored LVs.

I also picked up a 120GB Samsung 840 Evo but I can't figure out what to use it for.

I read that they recently added SSD caching to LVM in kernel mainline but I imagine it will be a year or two before that reaches Ubuntu.

What should I use it for then?

Should I get a second one for RAID so I can move the root (non-home) files to it for faster performance?

ljbade
  • 453

1 Answers1

2

Well bcache is an option on 14.04.

dm-cache (for which lvmcache is apparently just a friendly frontend) seems faster according to benchmarks but seems quite painful to use directly. That should still be an option if you like, but it's a slog.

You could manually update (or find a PPA for) lvm2. This package is largely just a toolchain for exploiting Kernel features so (with a pinch of salt and many backups) should be relatively safe to run on 14.04.

Community
  • 1
Oli
  • 299,380