[Box-Admins] Jenkins job outputs compressed to free space on box3

[Chris Muller]

Cool, yeah, I've actually used 7zip a couple of times many years ago.
I liked the compression but lack of ubiquitous-accessibility thwarted
me.  A couple of times I found myself in the situation of simply
needing unzip one of my own archived 7zip files but not having the
right utility installed on that machine nor memorized how to install
it.  I converted them back to regular zip.

Nowadays I use the compressor included with Ubuntu 12.04, and I do see
a .lzma option on there.  I'll have to try it out, do you suppose that
is compatible 7zip?


On Mon, Mar 3, 2014 at 7:49 PM, Levente Uzonyi <leves at elte.hu> wrote:
> On Mon, 3 Mar 2014, Chris Muller wrote:
>
>> Just FYI, bz2 reduces to a size that is about 60% of regular zip.
>
>
> And 7z[1] with lzma is even better. 7zip[2] can also produce better results
> for other compression methods, like gzip, zip or bz2. For example the
> SqueakV41.sources file compressed
> - using gzip: 6641435 bytes
> - using gzip -9: 6616622 bytes
> - 7z a -tgzip -mpass=15 -mfb=258 (this is 7zip creating a gzip archive
> achiving the best possible compression ratio with this algorithm): 6305658
> bytes
> - bzip2: 5556572 bytes
> - bzip2 -9: 5556572 bytes (yes, same as above)
> - 7z a -tbzip2 -mx=9 (7z creating a bz2 archive with "ultra" compression):
> 5549301 bytes
> - 7z a (this is 7z with lzma creating a .7z archive): 3966903 bytes
> - 7z a -mx=9 (same as above with "ultra" compression): 3690018 bytes
>
> Lzma has been around for 15 years, its compression ratio is clearly better
> than other methods', so I see no reason why it shouldn't be used.
>
>
> Levente
>
> [1] https://en.wikipedia.org/wiki/7z
> [2] https://en.wikipedia.org/wiki/7-Zip
>
> P.S.: 7zip can also create .zip and .bz2 archives which use lzma as
> compression method, but that would just confuse people whose decompression
> tool doesn't support lzma.
>
>>
>> On Sun, Mar 2, 2014 at 6:54 PM, David T. Lewis <lewis at mail.msen.com>
>> wrote:
>>>
>>> box3.squeak.org was up to 97% disk utilization, so I freed up some space
>>> as follows:
>>>
>>> davidlewis at box3-squeak:/var/lib/jenkins$ nice gzip -v
>>> jobs/SqueakTrunk/builds/[1-6]??/archive/target/TrunkImage.*
>>>
>>> This compresses outputs of the SqueakTrunk job. None of the compressed
>>> files
>>> are directly referenced from the build.squeak.org page so I do not
>>> anticipate
>>> problems, and the compressed files can be easily uncompressed if anyone
>>> needs
>>> them.
>>>
>>> I do not know if any of the compressed files are of general interest. If
>>> not,
>>> they can be deleted to free up more disk space.
>>>
>>> Disk space utilization is now at 83%.
>>>
>>> Dave
>>
>>
>