-----Original Message-----
From: Richard Reina [mailto:[EMAIL PROTECTED] 
Sent: Tuesday, December 07, 2004 11:30 AM
To: [EMAIL PROTECTED]
Subject: When to cluster vs. replicate

For some time I have been considering replication for added redundancy
so that should something happen to the server I could quickly deploy the
slave as the main server until the problem is fixed.  However, now I
reading about great MySQL clustering is.  What exactly is clustering and
should I look to employ it instead of replication?  


Clustering is designed for real-time redundancy of a transaction.
Replication is batch redundancy system that works on top of any mySQL
storage engine. Use Clustering if you need to provide multiple write
points and your system needs to stay alive in the event of a single
server crashing.

Use Replication if you want semi-realtime backup or need to use a
storage engine that is incredibly fast like myISAM to spread out
database READ access load. Replication currently doesn't allow a SLAVE
to have multiple MASTERS, thus it cannot be used out of the box as a
"clustered solution".


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