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From Jeff Hodges <>
Subject Re: Database backstore
Date Sat, 13 Jun 2009 13:38:53 GMT
On 6/11/09, Jonathan Ellis <> wrote:
> 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.
> -Jonathan
> 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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