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From mobiledream...@gmail.com
Subject Re: one server or more servers?
Date Wed, 15 Jul 2009 23:17:06 GMT
port 7002 doesnt trying nodeprobe

On Wed, Jul 15, 2009 at 4:03 PM, Anthony Molinaro <
anthonym@alumni.caltech.edu> wrote:

> Alternatively if you are using the 0.3 release you can point a browser
> at port 7002 of one of the boxes and should see all the nodes in the
> list.
>
> -Anthony
>
> 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
> > https://issues.apache.org/jira/browse/CASSANDRA-252 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.
> >
> > Michael
> >
> > On Wed, Jul 15, 2009 at 5:33 PM, <mobiledreamers@gmail.com> wrote:
> > > 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 <markxr@gmail.com> wrote:
> > >>
> > >> 2009/7/14 <mobiledreamers@gmail.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
> > >
> > >
> > >
> > > --
> > > Bidegg worlds best auction site
> > > http://bidegg.com
> > >
>
> --
> ------------------------------------------------------------------------
> Anthony Molinaro                           <anthonym@alumni.caltech.edu>
>



-- 
Bidegg worlds best auction site
http://bidegg.com

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