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From Jonathan Ellis <>
Subject Re: Database backstore
Date Fri, 12 Jun 2009 03:36:52 GMT
I suppose you could do that either directly from your client or with a
proxy, but if your rdbms can handle the write volume then just use
replication to handle the reads.  Typically people move to Cassandra
and other distributed dbs when they need to scale more writes than you
can do on an rdbms.

If possible, I think a better approach to "I don't trust this new
technology" is to keep a separate (distributed) log of your writes
somehow such that if you absolutely had to you could rebuild your
cassandra data from.

Risk of corruption with Cassandra is much lower than most systems
since SSTables are immutable once written.


On Thu, Jun 11, 2009 at 6:53 PM, testn<> wrote:
> Is it possible to persist the data into the database and using cassandra as a
> cache writethrough? I wonder this because many organizations don't really
> quite believe in the reliability of disk storage (i.e. can be corrupted). If
> Cassandra can load data from Database on the fly while persisting it into
> the database when writing, it would be perfect..
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