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From Jon Graham <sjclou...@gmail.com>
Subject Re: Adjusting Token Spaces and Rebalancing Data
Date Mon, 01 Mar 2010 19:44:24 GMT
Jonathan, Thanks for the quick reply.

After starting a loadbalance operation for about 30 minutes,  I can see 3
ColumnFamily-tmp-Data, Filter and Index files
on a lightly loaded node. The Data file has a size of 2,147,483,647 (max
signed int) on the node being loaded. I hope I didn't run out of Int space
during the load balance operation.

The file sizes don't seem to be changing in the column family folder of the
newly loaded node. The system/LocationInfo files haven't changed in 20
minutes. The 3 ColumnFamily files still have the -tmp- name.

Can I tell if the load balancing operaion is still running ok or if it
has terminated?

Is there a rough computation to determine how long the process should take?

If the load balancing is successful, will the cluster ring
information reflect the load balanacing changes?

Thanks,
Jon
On Mon, Mar 1, 2010 at 10:47 AM, Jonathan Ellis <jbellis@gmail.com> wrote:

> nodetool is the 0.6 replacement for nodeprobe.  the stream info is new
> in that version.
>
> (0.6 beta release is linked from
> http://wiki.apache.org/cassandra/GettingStarted)
>
> -Jonathan
>
> On Mon, Mar 1, 2010 at 12:40 PM, Jon Graham <sjcloud22@gmail.com> wrote:
> > Hello Everyone,
> >
> > Jonathan,  Thanks for your advice :-)
> >
> > I have started a loadbalance operation on a busy cassandra node.
> >
> > The http://wiki.apache.org/cassandra/Operations web page indicates that
> > nodetool streams can
> > be used to monitor the status of the load balancing operation.
> >
> > I can't seem to find the nodetool command for cassandra 0.5.0.
> >
> > Is this a separate package/tool?
> >
> > Thanks,
> > Jon
> >
> >
> > On Wed, Feb 24, 2010 at 8:17 PM, Jonathan Ellis <jbellis@gmail.com>
> wrote:
> >>
> >> nodeprobe loadbalance and/or nodeprobe move
> >>
> >> http://wiki.apache.org/cassandra/Operations
> >>
> >> On Wed, Feb 24, 2010 at 6:17 PM, Jon Graham <sjcloud22@gmail.com>
> wrote:
> >> > Hello,
> >> >
> >> > I have 6 node Cassandra 0.5.0 cluster
> >> > using org.apache.cassandra.dht.OrderPreservingPartitioner with
> >> > replication
> >> > factor 3.
> >> >
> >> > I mistakenly set my tokens to the wrong values, and have all the data
> >> > being
> >> > stored on the first node (with replicas on the seconds and third
> nodes)
> >> >
> >> > Does Cassandra have any tools to reset the token values and
> >> > re-distribute
> >> > the data?
> >> >
> >> > Thanks for your help,
> >> > Jon
> >
> >
>

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