Date: Sun, 04 Jan 2009 12:40:25 +0000 From: Pete French <petefrench@ticketswitch.com> To: andrew@modulus.org Cc: freebsd-stable@freebsd.org Subject: Re: slow zvol performance compared to files on the same pool Message-ID: <E1LJSHJ-000Gfj-UE@dilbert.ticketswitch.com> In-Reply-To: <496011CC.2010201@modulus.org>
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> On 7.x (where ZFS is really quite broken for server use - don't waste > too much time on it) the ZVOL code did an "fsync" after every single > block write. Its a testament to your fast disks that you got as high as > 12mb/s. I don't know why your read speed was so bad, but you should try > again on 8-current as numerous fixes and improvements have happened. Ah, thatnks. That explains it perfectly. I'll re-do the read test and also give 8-CURRENT a try if I get the time. Thanks. -pete.
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