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From: Apache Wiki <wikidiffs@apache.org>
To: Apache Wiki <wikidiffs@apache.org>
Date: Thu, 25 Feb 2010 19:59:17 -0000
Message-ID: <20100225195917.15098.9363@eos.apache.org>
Subject: 
 =?utf-8?q?=5BPig_Wiki=5D_Update_of_=22Pig070IncompatibleChanges=22_by_Olg?=
 =?utf-8?q?aN?=

Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Pig Wiki" for chang=
e notification.

The "Pig070IncompatibleChanges" page has been changed by OlgaN.
http://wiki.apache.org/pig/Pig070IncompatibleChanges?action=3Ddiff&rev1=3D2=
9&rev2=3D30

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  =

  || Change || Section || Impact || Steps to address || Comments ||
  || Load/Store interface changes || Changes to the Load and Store Function=
s || High || [[LoadStoreMigrationGuide || Load Store Migration Guide]] || ||
- || Data compression becomes load/store function specific || Handling Comp=
ressed Data || Unknown but hopefully low || If compression is needed the un=
derlying Input/Output format would need to support it || ||
+ || Data compression becomes load/store function specific || Handling Comp=
ressed Data || Unknown but hopefully low || If compression is needed, the u=
nderlying Input/Output format would need to support it || ||
  || Bzip compressed files in PigStorage format can no longer have .bz exte=
nsion  || Handling Compressed Data || Low || 1. Rename existing .bz files t=
o .bz2 files. 2. Update scripts to read/write files with bz2 extension || T=
his change is due to the fact that Text{Input/Output}Format only supports b=
z2 extension ||
  || Switching to Hadoop's local mode || Local Mode || Low || None || Main =
change is 10-20x performance slowdown. Also, local mode now uses the same U=
DF interfaces to execute UDFs as the MR mode. ||
  || Removing support for Load-Stream or Stream-Store optimization || Strea=
ming || Low to None || None || This feature was never documented so it is u=
nlikely it was ever used ||