Friday, October 22, 2010

How fast you are in unziping on Linux

REASON  
you might need to unpack many files in directory on Linux


Try sequential unzip
for i in `ls -1 | grep .zip$`; do unzip $i; done
or

ls -1 *.zip | xargs -n 1 unzip &

Parallel unzipping , be careful it may hang your host for a while

 for i in `ls -1 | grep .zip$`; do unzip $i &  done


Try gunzip tar
for i in `ls -1 | grep .zip$`; do tar xfvz $i; done

18 comments:

  1. Nice approach, it will be faster if you add unzip $i &; so that files are unzipped in parallel.
    Anyway, there is a faster example in MAN page of unzip:
    To test all zipfiles in the current directory, printing only the summaries:

    unzip -tq \*.zip


    [orcl] ~/tmp $ unzip \*.zip
    Archive: mutt-1.4.1-10.i386.rpm.zip
    inflating: mutt-1.4.1-10.i386.rpm

    Archive: ncftp-3.1.9-0.1.rhel4.i386.rpm.zip
    inflating: ncftp-3.1.9-0.1.rhel4.i386.rpm

    2 archives were successfully processed.

    ReplyDelete
  2. Other thing to think about: if source and destination are on different HW disks|controllers

    ReplyDelete
  3. I usually do: ls -1 *.zip | xargs -n 1 unzip
    it extracs all zips serially (not the fastest way), but works under all platforms I've gotten my hands on except windows.

    ReplyDelete
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