On Wed, Jul 15, 2009 at 05:40:27PM -0500, Michael Greene wrote:
> You can use the nodeprobe utility in bin/ to contact each node and
> make sure they see the same information. Run it with no arguments to
> see the commands you can pass it.
> There is also an open issue at
for making this a
> little more automatic (instead of having to run nodeprobe on each node
> and check the results by hand, you can just pass in all the servers
> that you think should be able to see each other) but there's no code
> for this yet.
> On Wed, Jul 15, 2009 at 5:33 PM, <email@example.com
> > Mark and Jonathan
> > I have started cassandra on 4 servers with all 4 of them as seeds
> > how do i know all 4 are now part of the datastore
> > are there ways to test this
> > thanks a lot
> > On Tue, Jul 14, 2009 at 8:30 AM, Mark Robson <firstname.lastname@example.org
> >> 2009/7/14 <email@example.com
> >>> 1. If you only have 3 production servers, Cassandra may not do much for
> >>> you. You will probably only care if you have lots more servers. 3 servers is
> >>> a reasonable minimum for a test / dev environment
> >>> At How many servers does cassandra start really performing?
> >>> or how many servers is an ideal setup say for a game 10?
> >> It can use any number, three is probably a reasonable minimum, I don't
> >> know what the maximum is.
> >> If you have a small number of servers, there is probably no reason to use
> >> Cassandra; you can more usefully use a conventional database with
> >> replication or sharding.
> >> The reason you might want to use Cassandra is to scale writes a lot, to
> >> levels you couldn't reach with more "conventional" databases.
> >> In all likelihood, an application would use Cassandra to store high-volume
> >> high-write data alongside a more conventional database to store smaller,
> >> less frequently changing stuff.
> >> It appears to me that Cassandra 0.3 is only really useful if running on a
> >> homogenous cluster of dedicated servers with reasonable amounts of memory /
> >> storage (But not necessarily high spec servers of CPU, IO speed or internal
> >> redundancy).
> >> Once the load balancing is implemented in 0.5 (according to current plans)
> >> it will become more useful for heterogenous environments.
> >> Mark
> > --
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