Re: elevator question

[Emmanuel Florac <eflorac@xxxxxxxxxxxxxx>]

Le Tue, 18 Mar 2014 11:18:04 +0100
Marko Weber|8000 <weber@xxxxxxxxxx> écrivait:

> i am barely new to this issue. What would you xfs guys recommend me?
> i prefer things i can do with kernel, so its dm-cache? bcache?

The easier will be bcache because it comes included with the kernel.

> the raid is an raid5 with 3 disks at moment. xfs filesystem.
> do i have to format it again and set special things?

No, only the cache itself must be reformatted.

> i use nobarrier at moment,

if you're not using a hardware RAID controller with a battery-backed or
flash-based cache, it may be risky. Depends mostly on your write
activity and power supply stability, though.


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