whether it is possible to create a sheaf RAID0+RAID1 on softovy reyd?

A

Alexander2013-12-07 16:57:27

RAID

Alexander, 2013-12-07 16:57:27

I recently installed a system (CentOs) and wondered if it was possible to create a similar bundle on a software raid? For example, make a swap partition in RAID0, and / in RAID1 or RAID10. Will there be problems or limitations in performance, security in the future?
2 disks, ext3, normal consumer mother.

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3 answer(s)

B

Boris Syomov, 2013-12-08
@ck80

Swap does not need to be created on Raid0, this greatly increases the likelihood of individual services crashing, and the server as a whole ...
In general, you don’t need to chase swap performance - you need to configure the server so that it is not used in normal mode.
Regarding different raids on the same disks:
Nobody prevents you from dividing disks equally into partitions, and creating a raid not from disks but from partitions (for this, by the way, there is a special type of partition fd or fd00). As a result, getting raids of various levels. For example, raid1 for boot and raid 10 for /, and the same swap.

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@mgyk, 2013-12-07
_

There is no problem, cut disks into partitions, raise a raid between partitions
md0 -> /dev/sda1 /dev/sdb1
md1 -> /dev/sda2 /dev/sdb2

V

Vlad Zhivotnev, 2013-12-08
@inkvizitor68sl

There are no performance issues. Didn't meet with security either.
In no case do not create swap in raid0 if it is a pity to lose data in memory (especially if there is mysql on the machine - it will blow its head off if it swaps, and the raid under swap will fall apart).
Scheme mgyk described above is correct.