Compression tests


  • Moderator

    Hi,

    I have try some compression level, below results :

    Host configuration :

    • Core I5
    • 12 Go RAM
    • Ethernet : Giga

    LAN Configuration :

    • Ethernet : Giga

    Deploy method : unicast

    Installation :

    • Single boot Windows 7
    • Size : 87 Go

    Compression : 0

    -rwxrwxrwx 1 root root 512 févr. 10 10:32 d1.mbr
    -rwxrwxrwx 1 root root 0 févr. 10 10:32 d1.original.swapuuids
    -rwxrwxrwx 1 root root 25363450 févr. 10 10:32 d1p1.img
    -rwxrwxrwx 1 root root 86580172755 févr. 10 10:53 d1p2.img
    -rwxrwxrwx 1 root root 171142723 févr. 10 10:54 d1p3.img

    Tasks :

    Upload : not tested
    Donwload : ~3G/Min - ~29 mins

    Compression : 5 ( The winner :p )

    -rwxrwxrwx 1 root root 512 mai 13 10:45 d1.mbr
    -rwxrwxrwx 1 root root 0 mai 13 10:45 d1.original.swapuuids
    -rwxrwxrwx 1 root root 8544045 mai 13 10:45 d1p1.img
    -rwxrwxrwx 1 root root 40054036052 mai 13 11:03 d1p2.img
    -rwxrwxrwx 1 root root 3459293 mai 13 11:04 d1p3.img

    Tasks :

    Upload : ~4.9G/Min - ~17 mins
    Donwload : ~6.4G/Min - ~13mins

    Compression : 9

    -rwxrwxrwx 1 root root 512 mai 13 11:26 d1.mbr
    -rwxrwxrwx 1 root root 0 mai 13 11:26 d1.original.swapuuids
    -rwxrwxrwx 1 root root 8471371 mai 13 11:26 d1p1.img
    -rwxrwxrwx 1 root root 39740659244 mai 13 12:10 d1p2.img
    -rwxrwxrwx 1 root root 3035522 mai 13 12:10 d1p3.img

    Tasks :

    Upload : ~1.9G/Min - ~43mins
    Donwload : ~6.9G/Min - ~12mins



  • So I did my own testing and I don’t find there to be much difference for downloading, but compression level does seem to increase uploading time significantly. If interested, my post is titled more compression testing.


  • Moderator

    I always choose either 6 or 7.

    6 for old stuff, 7 for new stuff…

    that’s just me though.



  • I know that I speak for EVERYONE when saying yes, lets get it down to at least 6 (maybe 5?).


  • Senior Developer

    I will be making an effort to switch the default from 9 to 5 or 6. It seems this is the best bang for your buck as Upload and Download are very well handled. Ultimately you’re not saving much more at 9 than you do at a compression rating of 5 or 6 and it just takes it so long to upload that it’s not really worth the effort. I mean it’s basically less than 1% size difference between 9 and 5.

    I hope this is good for everybody, of course your own settings can be adjusted as well.



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