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From Vivek Mishra <>
Subject DatabaseMetadata
Date Fri, 20 May 2011 12:12:43 GMT
Any thoughts on building something like separate DatabaseMetadata api for CQL?

-----Original Message-----
From: Peter Lin []
Sent: Friday, May 20, 2011 5:28 PM
Subject: Re: Cassandra Vs. Oracle Coherence

That's completely wrong.

TimesTen and Coherence are 2 separate products sold by Oracle.
Coherence is a data grid that takes a key/value approach. It is massively scalable across
LAN and WAN.

In terms of comparing Cassandra and Coherence, I wouldn't. Coherence is a data grid and most
often used as a fault tolerant distributed cache, though it does a lot more than that. Oracle
bought Tangosol a few years back.

On Fri, May 20, 2011 at 4:23 AM, Jeffrey Kesselman <> wrote:
> I believe coherence is their name for the TimesTen technology they bought.
> TT is an in memory SQL database that can  run as a cache for Oracle.
> Its totally different from Cassandra.   On the one hand it supports
> trad SQL whereas Cassandra does not.  On the other hand Cassandra is
> truly distributed and fault tolerant, whereas TT is not.
> I suggest getting and reading the Oriely Cassandra book.
> JK
> On Tue, May 17, 2011 at 10:44 PM, Karamel, Raghu
> <> wrote:
>> Hi,
>> I am new to Cassandra and very excited with the technology. I am
>> evaluating it and trying to understand the difference between
>> Cassandra and Oracle Coherence. Precisely , looking for reasons why
>> would some select Cassandra over Oracle Coherence. Does anyone did the exercise of
comparing them?
>> Appreciate if you can share some information on that.
>> Regrads
>> -RK
> --
> It's always darkest just before you are eaten by a grue.


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