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From Apache Wiki <wikidi...@apache.org>
Subject [Jackrabbit Wiki] Update of "Clustering" by ThomasMueller
Date Sat, 05 Feb 2011 09:29:46 GMT
Dear Wiki user,

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

The "Clustering" page has been changed by ThomasMueller.
http://wiki.apache.org/jackrabbit/Clustering?action=diff&rev1=27&rev2=28

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

  
  == Overview ==
  
- Clustering in Jackrabbit works as follows: content is shared between all cluster nodes.
That means all Jackrabbit cluster nodes need access to the SAME persistent storage (persistence
manager, data store, and repository file system).
+ Clustering in Jackrabbit works as follows: content is shared between all cluster nodes.
That means all Jackrabbit cluster nodes need access to the *same* persistent storage (persistence
manager, data store, and repository file system).
  
- The persistence manager must be clusterable (eg. central database that allows for concurrent
access, see [[PersistenceManagerFAQ]]); any DataStore (file or DB) is clusterable by its very
nature, as they store content by unique hash ids. However, each cluster node needs its own
(private) workspace FileSystem and [[Search]] index.
+ The persistence manager must be clusterable (eg. central database that allows for concurrent
access, see [[PersistenceManagerFAQ]]); any DataStore (file or DB) is clusterable by its very
nature, as they store content by unique hash ids. 
+ 
+ However, each cluster node needs its own (private) repository directory, including repository.xml
file, workspace FileSystem and [[Search]] index.
  
  Every change made by one cluster node is reported in a journal, which can be either file
based or written to some database.
  

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