From mboxrd@z Thu Jan  1 00:00:00 1970
From: KADOTA Kyohei <lufia@me.com>
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Message-id: <87C61423-7C13-4516-88B5-C2ABA7D32AA9@me.com>
Date: Mon,  4 May 2015 18:32:08 +0900
To: 9fans@9fans.net
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Subject: [9fans] fossil+venti performance question
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Hello, fans.

I=E2=80=99m running Plan 9(labs) on public QEMU/KVM service.
My Plan 9 system has a slow read performance problem.
I ran 'iostats md5sum /386/9pcf=E2=80=99, DMA is on, read result is =
150KB/s.
but write performance is fast.

My Plan 9 system has a 200GB HDD, formatted with fossil+venti.
disk layout is:

- 9fat	100MB
- nvram	512B
- fossil	31.82GB
- arenas	159.11GB
- isect	7.95GB
- bloom	512MB
- swap	512MB

Also, I explained other installations.

1)200GB HDD with fossil only.
2)100GB HDD with fossil+venti.

Read performance is fast (about 15MB/s) both installations.

Could you tell me the reason?=