software raid + fs -- performance

[Άγγελος Οικονομόπουλος]

On Wednesday 19 June 2002 01:58, V13 wrote:
[snip]
>  Exo dokimasei ext3(me -T largefile kai -T largefile4), raiserfs kai xfs
> kai exo xrisimopoihsei san chunk-size sto raid, times apo 64K mexri 2MB.
> Par'ola ayta den eida kapia aisthiti diafora kai tyxainoyn stigmes opoy
> to vmstat dixnei bi (read apo diskoys) mikroteres apo 1.5MB/s (kai ayto
> einai kai to 'bottleneck' tis periptosis') eno oi diskoi doylevoyn san
> treloi, me ta lampakia toys na anaboyn synexeia kai na kanoyn 'arketi'
> fasaria. Epeksa ligo me to stripe toy ext3, alla kai pali den ebgala
> akri.

h diaxeirhsh ths page cache prepei na paizei to basiko rolo sthn periptwsh 
mias db ligwn gb pou brisketai monh ths se ena filesystem. to fs-type einai 
mallon adiaforo.

dokimases na kaneis benchmarks anamesa sta -aa, -ac kai vanilla trees? 
(fhmes lene oti to -aa einai kapws kalutero apo ton official kernel)

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