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

[Levente Uzonyi]

On Mon, 3 Mar 2014, Chris Muller wrote:

> 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?

If you mean that the Archive Manager tool in Ubuntu 12.04 can decompress a 
7z archive, then yes, it can.


Levente

>
>
> 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
>>>
>>>
>>
>