Re: configserver setup question

Hi,

thanks for the quick response,  got a follow up question tho...

my log file says :
Mon Aug 23 13:33:19 need either 1 or 3 configdbs

my understanding is the config db part is done by the configsvr
process (mongod).  and that the mongos process just points to all the
config servers.  so in my case, i can't have two, because of the 1 or
3 limitation. (any way to bypass this?)   which prevents me from
having a 2 node redundant system.  so in order to have a redundant
mongo system, i need a minimum of 3 pieces of hardware?  I can't seem
to run 2nd one on the same server because of the lock file.

On Aug 23, 9:10 am, Kristina Chodorow <krist...@...> wrote:
> The config servers will sync themselves.  Just start up three without the
> replSet option and start a mongos with
>
> ./mongos --configdb config1,config2,config3
>
> (where configN is the host/port of each config server).  It'll work itself
> out.
>
> On Mon, Aug 23, 2010 at 9:06 AM, Jon <not.jon.tay...@...> wrote:
> > Hi,
>
> > I'm using a two node setup (alpha01/alpha02) for some testing, and i'm
> > having some confusion i was hoping somebody could help me clear up.
> > (the two nodes are sharded replica sets).  I wanted to be able to
> > knock down one of my two nodes and see if it continued to function.
>
> > In the docs ->http://www.mongodb.org/display/DOCS/Sharding+and+Failover
> > it says "A production shard cluster will have three config server
> > processes, each existing on a separate machine. "
>
> > i realize i'm tryin to fudge things with just two, but should i be
> > trying to replicate the configsvr process?  i gave it a shot, and it
> > won't let me configure it,
>
> > mongod --fork --replSet pok --configsvr --dbpath /data/db/config --
> > port 20000 --logpath /var/log/mongodb/mongo.log
> > > rs.initiate(config);
> >        "errmsg" : "couldn't initiate : member
> > alpha02.mdc.gameloft.org:20000
> > has data already, cannot initiate set.  All members except initiator
> > must be empty.",
> >        "ok" : 0
>
> > If i try and setup my environment without replicated config servers (1
> > per server), as below..
> > using 1.6.1
> > SERVER 1
> >  9472 ?        Sl    33:51 mongod --replSet foo --shardsvr --dbpath /
> > data/db/shard00 --port 10000 --logpath /var/log/mongodb/mongo.log --
> > fork
> >  9562 ?        Sl    32:59 mongod --replSet foo2 --shardsvr --dbpath /
> > data/db/shard01 --port 10001 --logpath /var/log/mongodb/mongo.log --
> > fork
> > 29364 ?        Sl     0:00 mongod --fork --configsvr --dbpath /data/db/
> > config --port 20000 --logpath /var/log/mongodb/mongo.log
> > 29381 ?        Sl     0:00 mongos --fork --configdb
> > alpha01.mdc.gameloft.org:20000 --chunkSize 1 --logpath /var/log/
> > mongodb/mongos.log
> > SERVER 2
> >  872 ?        Sl     0:00 mongod --fork --configsvr --dbpath /data/db/
> > config --port 20000 --logpath /var/log/mongodb/mongo.log
> >  881 ?        Sl     0:00 mongos --fork --configdb
> > alpha02.mdc.gameloft.org:20000 --chunkSize 1 --logpath /var/log/
> > mongodb/mongos.log
> >  2725 ?        Sl    95:36 mongod --replSet foo --shardsvr --dbpath /
> > data/db/shard00 --port 10000 --logpath /var/log/mongodb/mongo.log --
> > fork
> >  2835 ?        Sl    91:31 mongod --replSet foo2 --shardsvr --dbpath /
> > data/db/shard01 --port 10001 --logpath /var/log/mongodb/mongo.log --
> > fork
>
> > when i connect to mongo on the 2nd server..
> > [root <at> alpha01 ~]# mongo mydb
> > MongoDB shell version: 1.6.1
> > connecting to: mydb
> > > show collections;
> > mycollection
> > system.indexes
>
> > [root <at> alpha02 db]# mongo mydb
> > MongoDB shell version: 1.6.1
> > connecting to: mydb
> > > show collections;
> > Mon Aug 23 13:02:02 uncaught exception: error: { "$err" : "can't find
> > a shard to put new db on", "code" : 10185 }
>
> > If i kill the mongos process on alpha02, and point it to alpha01, i
> > can connect fine, which makes sense.. but if alpha01 goes down, i've
> > effectively lost my database.
>
> > How do i sync the configurations between servers?
>
> > Thanks for any help.
>
> > --
> > You received this message because you are subscribed to the Google Groups
> > "mongodb-user" group.
> > To post to this group, send email to mongodb-user@...
> > To unsubscribe from this group, send email to
> > mongodb-user+unsubscribe@...<mongodb-user%2Bunsubscribe <at> googlegroups.com>
> > .
> > For more options, visit this group at
> >http://groups.google.com/group/mongodb-user?hl=en.

--

-- 
You received this message because you are subscribed to the Google Groups "mongodb-user" group.
To post to this group, send email to mongodb-user@...
To unsubscribe from this group, send email to mongodb-user+unsubscribe <at> googlegroups.com.
For more options, visit this group at http://groups.google.com/group/mongodb-user?hl=en.