On 09/27/11 10:59 AM, Tomas Forsman wrote:
On 27 September, 2011 - Ian Collins sent me these 0,8K bytes:

  On 09/27/11 07:55 AM, Jesus Cea wrote:
Hash: SHA1

I just upgraded to Solaris 10 Update 10, and one of the improvements
is "zfs diff".

Using the "birthtime" of the sectors, I would expect very high
performance. The actual performance doesn't seems better that an
standard "rdiff", though. Quite disappointing...

Should I disable "atime" to improve "zfs diff" performance? (most data
doesn't change, but "atime" of most files would change).

I tend to disable atime in the root filesystem and only enable it on a
filesystem if required.  So far, it has never been required on any of
the systems I look after!
I've found it useful time after time.. do things and then check atime
to see whatever files it looked at..
(yes, I know about truss and dtrace)

It can be useful, but unless you really want the functionality, it generates a lot of unnecessary writes.


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