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Re: making more room in root partition for distribution upgrade




On Mon, 21 May 2018 23:09:46 +0300 Abdullah Ramazanoğlu said:

> and (2) not taking advantage of distributed swap I/O.
> 
> Though, RAID-1 read logic (of concurrent parallel I/O) partly compensates for
> (2).

I forgot to mention that with mirrored swap, the mirrored *write* penalty
exceeds the *read* parallelization gains by RAID-1.

RAID-1 parallelizes only the read operations, while write ops are still
duplicated. With a swap bound system, your swap-write I/O doubles with mirrored
swap, choking both drives. Whereas with distributed (separate) swap partitions
you get a smooth swap-write distribution.

Regards
-- 
Abdullah Ramazanoğlu