ZFS: How to enable cache and logs.

[Freddie Cash]

On Thu, May 12, 2011 at 4:19 PM, Bob Friesenhahn
<bfriesen at 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 at gmail.com