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

[Chris Cunnington]

I just installed p7zip-full. I checked and verified the existence of man pages for 7z and 7za. 
The following looks like a reliable primer on how to use it:

https://www.ibm.com/developerworks/community/blogs/6e6f6d1b-95c3-46df-8a26-b7efd8ee4b57/entry/how_to_use_7zip_on_linux_command_line144?lang=en

For fun I tried it out [1]

Chris 

[1]

chris*@box*-squeak:~$ 7z a squeak.org.7z squeak.org/

7-Zip 9.04 beta  Copyright (c) 1999-2009 Igor Pavlov  2009-05-30
p7zip Version 9.04 (locale=en_US.UTF-8,Utf16=on,HugeFiles=on,1 CPU)
Scanning

Creating archive squeak.org.7z

Compressing  squeak.org/squeakfavicon.ico
Compressing  squeak.org/Squeak4.4-12327.changes
Compressing  squeak.org/SqueakDebug.log
Compressing  squeak.org/SqueakV41.sources
Compressing  squeak.org/squeaksite.st
Compressing  squeak.org/Squeak4.4-12327.image

Everything is Ok
chris*@box*-squeak:~$ ls
coglinux  squeak.org  squeak.org.7z




On Mar 3, 2014, at 8:49 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
>> 

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