On Wed, Jun 9, 2010 at 02:29, Rob Stewart <[email protected]> wrote: > Hi Randall, > > With a response time like that, efficiency is your strong point.
Clearly that was somewhere below my mean response time ;) > Next, you suggest potential like solution as Cassandra and Dynamo. I'd tend > to agree, as these are stable distributed systems. On saying that, Cassandra > doesn't use Erlang (as a Java implementation), though it adopted the > flexible column layout from Google's BigTable. I've also had a look at > MongoDB, which is a C++ implementation, but with similar goals as CouchDB > (document-oriented database). They are currently working on database > partitioning, though it's in its alpha stages, in version 1.5.3. I imagine > that MongoDB could be a good design guide for CouchDB in the future should > its sharding implementation matures. I wasn't trying to suggest you use Cassandra. I was trying to point to different approaches to sharding/clustering used by other projects and expressing an interest in seeing a Dynamo-style clustering of Couch. > In a slightly unrelated note, can I point you to a paper published in > February, 2010 - “Key/Value Datastores Comparison in AppScale”. Briefly, > AppScale is a open source drop-in replacement for Google's App Engine, and > provides API's to Cloud based web applications (typicall), and at the > backend that have plugged in their app API's to the API's of 7 distributed > databases (including Cassandra and MongoDB). What are the chances of > attaching CouchDB to the AppScale API's ? Haven't had a chance to look yet, but that sounds like a pretty nice idea. > > > My final point is Scalaris. (Google “Reliable Transactional P2P Key/Value > Store”). Like CouchDB, it is a P2P datastore, implemented in Erlang. Appears > to be similar in design and implementation to CouchDB, to me? It uses Chord# > to storing and retreiving key/values in nodes. It seemingly has support for > Heterogeneous hardware clusters, and it currently uses an in-memory > disctionary for database stores, though using Mnesia has been suggested I'm always surprised Scalaris doesn't come up more. I really like the approach it takes. I don't hear much about it being used in the wild. Have you any experience with it? > > Is that enough, to generate discussion, Randall ? > Heh. I dunno. What else do you want to talk about? What are you thinking about doing next? -Randall
