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From Daning Wang <dan...@netseer.com>
Subject Re: Upgrade to Cassandra 1.2
Date Tue, 12 Feb 2013 01:55:07 GMT
Thanks Aaron.

I tried to migrate existing cluster(ver 1.1.0) to 1.2.1 but failed.

- I followed http://www.datastax.com/docs/1.2/install/upgrading, have
merged cassandra.yaml, with follow parameter

num_tokens: 256
#initial_token: 0

the initial_token is commented out, current token should be obtained from
system schema

- I did rolling upgrade, during the upgrade, I got "Borken Pipe" error from
the nodes with old version, is that normal?

- After I upgraded 3 nodes(still have 5 to go), I found it is total wrong,
the first node upgraded owns 99.2 of ring

[cassy@d5:/usr/local/cassy conf]$  ~/bin/nodetool -h localhost status
Datacenter: datacenter1
=======================
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
--  Address           Load       Tokens  Owns   Host ID
          Rack
DN  10.210.101.117    45.01 GB   254     99.2%
 f4b6afe3-7e2e-4c61-96e8-12a529a31373  rack1
UN  10.210.101.120    45.43 GB   256     0.4%
0fd912fb-3187-462b-8c8a-7d223751b649  rack1
UN  10.210.101.111    27.08 GB   256     0.4%
bd4c37bc-07dd-488b-bfab-e74e32c26f6e  rack1


What was wrong? please help. I could provide more information if you need.

Thanks,

Daning



On Mon, Feb 4, 2013 at 9:16 AM, aaron morton <aaron@thelastpickle.com>wrote:

> There is a command line utility in 1.2 to shuffle the tokens…
>
> http://www.datastax.com/dev/blog/upgrading-an-existing-cluster-to-vnodes
>
> $ ./cassandra-shuffle --help
> Missing sub-command argument.
> Usage: shuffle [options] <sub-command>
>
> Sub-commands:
>  create           Initialize a new shuffle operation
>  ls               List pending relocations
>  clear            Clear pending relocations
>  en[able]         Enable shuffling
>  dis[able]        Disable shuffling
>
> Options:
>  -dc,  --only-dc           Apply only to named DC (create only)
>  -tp,  --thrift-port       Thrift port number (Default: 9160)
>  -p,   --port              JMX port number (Default: 7199)
>  -tf,  --thrift-framed     Enable framed transport for Thrift (Default:
> false)
>  -en,  --and-enable        Immediately enable shuffling (create only)
>  -H,   --help              Print help information
>  -h,   --host              JMX hostname or IP address (Default: localhost)
>  -th,  --thrift-host       Thrift hostname or IP address (Default: JMX
> host)
>
> Cheers
>
> -----------------
> Aaron Morton
> Freelance Cassandra Developer
> New Zealand
>
> @aaronmorton
> http://www.thelastpickle.com
>
> On 3/02/2013, at 11:32 PM, Manu Zhang <owenzhang1990@gmail.com> wrote:
>
> On Sun 03 Feb 2013 05:45:56 AM CST, Daning Wang wrote:
>
> I'd like to upgrade from 1.1.6 to 1.2.1, one big feature in 1.2 is
> that it can have multiple tokens in one node. but there is only one
> token in 1.1.6.
>
> how can I upgrade to 1.2.1 then breaking the token to take advantage
> of this feature? I went through this doc but it does not say how to
> change the num_token
>
> http://www.datastax.com/docs/1.2/install/upgrading
>
> Is there other doc about this upgrade path?
>
> Thanks,
>
> Daning
>
>
> I think for each node you need to change the num_token option in
> conf/cassandra.yaml (this only split the current range into num_token
> parts) and run the bin/cassandra-shuffle command (this spread it all over
> the ring).
>
>
>

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