[openstack-dev] [Fuel] Change diagnostic snapshot compression algoritm
dpyzhov at mirantis.com
Tue Nov 25 16:30:33 UTC 2014
Thank you all for your feedback. Request postponed to the next release. We
will compare available solutions.
On Mon, Nov 24, 2014 at 2:36 PM, Vladimir Kuklin <vkuklin at mirantis.com>
> guys, there is already pxz utility in ubuntu repos. let's test it
> On Mon, Nov 24, 2014 at 2:32 PM, Bartłomiej Piotrowski <
> bpiotrowski at mirantis.com> wrote:
>> On 24 Nov 2014, at 12:25, Matthew Mosesohn <mmosesohn at mirantis.com>
>> > I did this exercise over many iterations during Docker container
>> > packing and found that as long as the data is under 1gb, it's going to
>> > compress really well with xz. Over 1gb and lrzip looks more attractive
>> > (but only on high memory systems). In reality, we're looking at log
>> > footprints from OpenStack environments on the order of 500mb to 2gb.
>> > xz is very slow on single-core systems with 1.5gb of memory, but it's
>> > quite a bit faster if you run it on a more powerful system. I've found
>> > level 4 compression to be the best compromise that works well enough
>> > that it's still far better than gzip. If increasing compression time
>> > by 3-5x is too much for you guys, why not just go to bzip? You'll
>> > still improve compression but be able to cut back on time.
>> > Best Regards,
>> > Matthew Mosesohn
>> Alpha release of xz supports multithreading via -T (or —threads)
>> We could also use pbzip2 instead of regular bzip to cut some time on
>> Bartłomiej Piotrowski
>> OpenStack-dev mailing list
>> OpenStack-dev at lists.openstack.org
> Yours Faithfully,
> Vladimir Kuklin,
> Fuel Library Tech Lead,
> Mirantis, Inc.
> +7 (495) 640-49-04
> +7 (926) 702-39-68
> Skype kuklinvv
> 45bk3, Vorontsovskaya Str.
> Moscow, Russia,
> www.mirantis.com <http://www.mirantis.ru/>
> vkuklin at mirantis.com
> OpenStack-dev mailing list
> OpenStack-dev at lists.openstack.org
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