Date: Thu, 12 May 2011 17:46:05 -0700 From: Freddie Cash <fjwcash@gmail.com> To: Bob Friesenhahn <bfriesen@simple.dallas.tx.us> Cc: freebsd-fs@freebsd.org Subject: Re: ZFS: How to enable cache and logs. Message-ID: <BANLkTi=b%2BwA-ADup9SQvykexJBZwjK9WZw@mail.gmail.com> In-Reply-To: <alpine.GSO.2.01.1105121805500.8019@freddy.simplesystems.org> References: <1700693186.266759.1305241371736.JavaMail.root@erie.cs.uoguelph.ca> <alpine.GSO.2.01.1105121805500.8019@freddy.simplesystems.org>
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On Thu, May 12, 2011 at 4:19 PM, Bob Friesenhahn <bfriesen@simple.dallas.tx.us> wrote: > On Thu, 12 May 2011, Rick Macklem wrote: >>> >>> The large write feature of the ZIL is a reason why we should >>> appreciate modern NFS's large-write capability and avoid anchient NFS. >>> >> The size of a write for the new FreeBSD NFS server is limited to >> MAX_BSIZE. It is currently 64K, but I would like to see it much larger. >> I am going to try increasing MAX_BSIZE soon, to see what happens. > > Zfs would certainly appreciate 128K since that is its default block size. Note: the "default block size" is a max block size, not an "every block written is this size" setting. A ZFS filesystem will use any power-of-2 size under the block size setting for that filesystem. Only zvols have an "every block written will be this size" setting. -- Freddie Cash fjwcash@gmail.com
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