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From "Daniel Halperin (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (BEAM-683) Make BZIP compressed files splittable
Date Thu, 01 Dec 2016 21:59:59 GMT

     [ https://issues.apache.org/jira/browse/BEAM-683?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Daniel Halperin updated BEAM-683:
---------------------------------
    Component/s: sdk-py
                 sdk-java-core

> Make BZIP compressed files splittable 
> --------------------------------------
>
>                 Key: BEAM-683
>                 URL: https://issues.apache.org/jira/browse/BEAM-683
>             Project: Beam
>          Issue Type: Wish
>          Components: sdk-java-core, sdk-py
>            Reporter: Tim Sears
>            Priority: Minor
>   Original Estimate: 10h
>  Remaining Estimate: 10h
>
> Bzip2 is compressed as blocks, so it should be possible to do dynamic splitting. To do
this: Seek to a location in the bzip, then keep seeking until you find the 6 byte block-start
sequence 0x314159265359 (which is the 12 digit approximation of pi). You can use a bzip2 decompressor
from that point onwards.



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