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From Jonathan Ellis <jbel...@gmail.com>
Subject Re: Upgrade and Consistency Question
Date Sat, 17 Apr 2010 13:40:12 GMT
Sounds like http://wiki.apache.org/cassandra/FAQ#change_replication

On Sat, Apr 17, 2010 at 8:17 AM, Gary <daxiatou@gmail.com> wrote:
> I had a single-node instance (0.5) that has some data (1 SCF has 1 key and
> about 500k columns). I upgraded the node to 0.6 release yesterday and added
> another 0.6 node to try out clustering. The two nodes seem to work fine
> (discovered each other), but reading the data on either node only returns a
> tiny fraction (using pycassa). I had set the replication factor to be 2. I
> shut down the two nodes and reverted the first node back to 0.5, and can
> read the data out fine. Then I tried to read data from that node with 0.6,
> and it is also fine, so it is not pycassa's problem.
> I wonder what is the right way to do clustering in my case and how long
> "eventual" consistency will take. I want to use one node to collect data and
> the other node for analysis.
> Thanks for your time.

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