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Date: Tue, 31 Jul 2012 07:28:23 -0700 (PDT)
From: Tim <tim.a.zimmerm...@googlemail.com>
To: mongodb-user@googlegroups.com
Message-Id: <079e22cc-3bf3-4598-896a-2103ff7d3681@googlegroups.com>
Subject: How does a replica set exactly works?
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Hello I read all the documentation concerning mongoDB/replica sets and so 
one.

I still have a question. How is a dataset exactly stored? It says, that the 
sec. nodes copy the oplog in order to execute the operations theirselves.
Does every sec. node copy all the oplog?
For example, a client makes a write operation (lets say 5GB vol.)
are these 5 GB stored on the prim. node and every sec. node? every time?

For example, I have 4 server each with 32GB storage. Actual I want
to store 64GB data and replicate that due to the other 64 GB.
I would suggest to use 1 prim. node, 3 sec. nodes and 1 arbiter (for 
breaking ties).
Would I have "only" 32 GB storage and the other 96GB storage would only 
replicate? Or
does the data volume gets split somehow?

Best regards 

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Hello I read all the documentation concerning mongoDB/replica sets and so one.<br><br>I still have a question. How is a dataset exactly stored? It says, that the sec. nodes copy the oplog in order to execute the operations theirselves.<br>Does every sec. node copy all the oplog?<br>For example, a client makes a write operation (lets say 5GB vol.)<br>are these 5 GB stored on the prim. node and every sec. node? every time?<br><br>For example, I have 4 server each with 32GB storage. Actual I want<br>to store 64GB data and replicate that due to the other 64 GB.<br>I would suggest to use 1 prim. node, 3 sec. nodes and 1 arbiter (for breaking ties).<br>Would I have "only" 32 GB storage and the other 96GB storage would only replicate? Or<br>does the data volume gets split somehow?<br><br>Best regards
  <br>
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