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From 張 睿 <>
Subject Data migration between clusters
Date Tue, 30 Oct 2012 11:18:11 GMT

We have several Cassandra clusters in our department, each for a single
Now we're considering merge these clusters to a single one, and this
single one will serve
all applications using cassandra, each with a single keyspace.
We tried unifying all cluster names to a same one, but it didn't work
well since some
data got lost, maybe we did it in a wrong way.
Does anyone here know if there is an efficient way to migrate multiple
cassandra clusters' data
to a single cassandra cluster without any dataloss.


Ray Zhang

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