> From: zfs-discuss-boun...@opensolaris.org [mailto:zfs-discuss-
> boun...@opensolaris.org] On Behalf Of Ulrich Graef
>
> Do you use de-duplication? (does not directly harm the performance, but
> needs memory
> and slows down zfs diff through that)?
Yikes. That couldn't be more wrong. Yes, dedu
On 02/28/12 12:53 PM, Ulrich Graef wrote:
Hi Ian,
On 26.02.12 23:42, Ian Collins wrote:
I had high hopes of significant performance gains using zfs diff in
Solaris 11 compared to my home-brew stat based version in Solaris 10.
However the results I have seen so far have been disappointing.
Test
Hi Ian,
On 26.02.12 23:42, Ian Collins wrote:
I had high hopes of significant performance gains using zfs diff in
Solaris 11 compared to my home-brew stat based version in Solaris 10.
However the results I have seen so far have been disappointing.
Testing on a reasonably sized filesystem (4TB
I had high hopes of significant performance gains using zfs diff in
Solaris 11 compared to my home-brew stat based version in Solaris 10.
However the results I have seen so far have been disappointing.
Testing on a reasonably sized filesystem (4TB), a diff that listed 41k
changes took 77 minu
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:
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I just upgraded to Solaris 10 Update 10, and one of the improvements
is "zfs diff".
Using the "birt
On 27 September, 2011 - Ian Collins sent me these 0,8K bytes:
> On 09/27/11 07:55 AM, Jesus Cea wrote:
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>>
>> I just upgraded to Solaris 10 Update 10, and one of the improvements
>> is "zfs diff".
>>
>> Using the "birthtime" of the sectors, I wou
On 09/27/11 07:55 AM, Jesus Cea wrote:
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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
Ah yes, of course. I'd misread your original post. Yes, disabling
atime updates will reduce the number of superfluous transactions.
It's *all* transactions that count, not just the ones the app
explicitly caused, and atime implies lots of transactions.
Nico
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On 09/26/11 12:31, Nico Williams wrote:
> On Mon, Sep 26, 2011 at 1:55 PM, Jesus Cea wrote:
>> Should I disable "atime" to improve "zfs diff" performance? (most data
>> doesn't change, but "atime" of most files would change).
>
> atime has nothing to do with it.
based on my experiences with time
On Mon, 26 Sep 2011, Jesus Cea wrote:
"rsync" takes a bit less than 7 minutes. So "zfs diff" is actually
slower!.
It is important to define what is meant by "rsync". For example, a
common rsync operating mode is to simply compare whole-file timestamps
and file size in order to determine tha
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On 26/09/11 22:54, Jesus Cea wrote:
> On 26/09/11 22:29, David Magda wrote:
>> Talking about "7.55 GB" is mostly useless as well. If it's a
>> dozen video files then stat()ing them all with be done very
>> quickly by just running find(1). If however th
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On 26/09/11 21:31, Nico Williams wrote:
> atime has nothing to do with it.
>
> How much work zfs diff has to do depends on how much has changed
> between snapshots.
That is what I thought, but look at my example: less than 20 changes
and more than 1
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On 26/09/11 22:29, David Magda wrote:
> Talking about "7.55 GB" is mostly useless as well. If it's a dozen
> video files then stat()ing them all with be done very quickly by
> just running find(1). If however the 7.55 GB is made up of
> 7,550,000 files
On Mon, September 26, 2011 14:55, Jesus Cea wrote:
[...]
> real10m0.272s
> user0m0.809s
> sys 2m6.693s
> """
>
> 10 minutes to "diff" 7.55 GB is... disappointing.
>
> This machine uses a 2-mirror configurations, and there is no more
> activity going on in the machine. ZPOOL version 29,
On Mon, Sep 26, 2011 at 1:55 PM, Jesus Cea wrote:
> 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
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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 disappo
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