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From Apache Wiki <wikidi...@apache.org>
Subject [Hadoop Wiki] Update of "Hive/LanguageManual/Archiving" by PaulYang
Date Tue, 02 Nov 2010 03:37:42 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Hadoop Wiki" for change notification.

The "Hive/LanguageManual/Archiving" page has been changed by PaulYang.
http://wiki.apache.org/hadoop/Hive/LanguageManual/Archiving?action=diff&rev1=1&rev2=2

--------------------------------------------------

  
  Hive comes with the HiveHarFileSystem class that addresses some of these issues, and is
by default the value for {{{fs.har.impl}}}. Keep this in mind if you're rolling own version
of HarFileSystem. 
  
-  * The default HiveHarFileSystem.getFileBlockLocations() has NO LOCALITY. That means it
may introduce higher network loads or reduced performance.
+  * The default HiveHarFileSystem.getFileBlockLocations() has '''no locality''. That means
it may introduce higher network loads or reduced performance.
  
   * Archived partitions cannot be overwritten with INSERT OVERWRITE ... The partition must
be unarchived first.
+  
+  * If two processes attempt to archive the same partition at the same time, bad things can
happen. (Need to implement concurrency support..)
  
  == Under the hood ==
  
+ Internally, when a partition is archived, t
+ 

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