Re: Raidframe performances (was: Re: NFS performances)

[Emmanuel Dreyfus <manu%netbsd.org@localhost>]

On Tue, May 13, 2014 at 11:24:02AM +0200, Manuel Bouyer wrote:
> You should also check the partition alignements.

raid1 uses ld1a and ld2a
Both ld1a and ld2a have a NetBSD RAID partition starting at sector 63 
(very usual stuff). raid1 has a NetBSD FFS partition starting at 
sector 0.

> Also, you didn't say what the underlying hardware is.

SATA disks configured as JBOD (each disk is exported as is) on a 
3ware 9550SX controler.

But as said earlier, for a disk that has a partition in a RAID
an another partition outside of the RAID, the performance are weak
with the RAID and good without it. The underlying hardward hence 
seems fine.

-- 
Emmanuel Dreyfus
manu%netbsd.org@localhost