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From Apache Wiki <wikidi...@apache.org>
Subject [Cassandra Wiki] Update of "FAQ" by PeterSchuller
Date Fri, 25 Mar 2011 23:08:39 GMT
Dear Wiki user,

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

The "FAQ" page has been changed by PeterSchuller.
The comment on this change is: fix markup.
http://wiki.apache.org/cassandra/FAQ?action=diff&rev1=107&rev2=108

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  The set of nodes (a single node, or several) responsible for any given piece of data is
determined by:
  
   * The row key (data is partitioned on row key)
-  * The replication factor (decides <em>how many</em> nodes are in the replica
set for a given row)
+  * The replication factor (decides ''how many'' nodes are in the replica set for a given
row)
-  * The replication strategy (decides <em>which</em> nodes are part of said replica
set)
+  * The replication strategy (decides ''which'' nodes are part of said replica set)
  
  In the case of the SimpleStrategy, replicas are placed on succeeding nodes in the ring.
The first node is determined by the partitioner and the row key, and the remainder are placed
on succeeding node. In the case of NetworkTopologyStrategy placement is affected by data-center
and wrack awareness, and the placement will depend on how nodes in different racks or data
centers are placed in the ring.
  
- It is important to understand that Cassandra <em>does not</em> alter the replica
set for a given row key based on changing characteristics like current load, which nodes are
up or down, or which node your client happens to talk to.
+ It is important to understand that Cassandra ''does not'' alter the replica set for a given
row key based on changing characteristics like current load, which nodes are up or down, or
which node your client happens to talk to.
  

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