This is what the StorageProxy API does. There is an example in contrib/client_only. There are some fairly strong limitations:
- Java-only - No compatibility guarantees from version to version - You need a separate IP for each client On Tue, Nov 16, 2010 at 9:17 PM, Aaron Morton <aa...@thelastpickle.com> wrote: > No need to worry. > I run REST requests through Varnish box > nginx / Tornaod / Python box > > Cassandra cluster and can get requests in and out of the stack in a couple > of milliseconds. Using some old workstation HW and not paying much attention > to tuning. > Build it like a normal system and separate out the parts, if / when you have > problems then you can look at tuning the cassandra cluster or other parts of > the stack. There are normally a number of other issues to deal with before > network IO. > Hope that helps. > Aaron > > On 17 Nov, 2010,at 03:31 PM, E S <tr1skl...@yahoo.com> wrote: > > I am considering building a system as follows: > > 1. Data stored in Cassandra > 2. Webservice cluster (stateless) will pull data from cassandra and do > business > operations plus security enforcement > 3. Clients will hit the webservice cluster > > I'm trying to maintain a low read latency and am worried about the number of > hops. Client will hit the webservice. The webservice will hit a random node > in > the cassandra cluster. The cassandra cluster will then route the the > appropriate node and the data will flow all the way back. > > How many of these hops can I remove? I would bundle the cassandra and > webservice processes onto each box. If I route the webservice to always go > to > the local node, I'll remove one hop. Is it possible to optimize this further > so > that the client can use the cassandra routing logic to go to the webservice > that > also houses a cassandra node that contains the data? In this case, there > would > only be one hop, and if the data is used frequently, I it will likely reside > in > memory without requiring a separate caching layer. This is an internal > webservice, so I would be ok with a library on the client side to help with > the > routing. > > Is any of this possible? I was looking at the cassandra apis and couldn't > figure out a way. > > Thanks for any help! > > > > > -- Jonathan Ellis Project Chair, Apache Cassandra co-founder of Riptano, the source for professional Cassandra support http://riptano.com
