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From Owen Davies <cassan...@obduk.com>
Subject Re: Data not replicating to all datacenters
Date Mon, 03 Dec 2012 14:24:46 GMT
Hi Shamim

I have read a bit about the Tokens. I understand how that could effect
the data distribution at first, but I don't understand if we have
specified Options: [dc1:3, dc2:3], surely after a while all the data
will be on every server?

Thanks,

Owen

On 3 December 2012 14:06, Шамим <srecon@yandex.ru> wrote:
> Hello Owen,
>   Seems you did not configure token for all nodes correctly. See the section Calculating
Tokens for multiple data centers here http://www.datastax.com/docs/0.8/install/cluster_init
>
> Best regards
> Shamim
> ---
> On Mon, Dec 3, 2012 at 4:42 PM, Owen Davies <cassandra@obduk.com> wrote:
>
>     We have a 2 data center test cassandra setup running, and are writing
>     to it using LOCAL_QUORUM. When reading, sometimes the data is there,
>     sometimes it is not, which we think is a replication issue, even
>     though we have left it plenty of time after the writes.
>
>     We have the following setup:
>
>     cassandra -v: 1.1.6
>
>     cassandra.yaml
>     -----------------------
>
>     cluster_name: something
>
>     endpoint_snitch: PropertyFileSnitch
>
>     cassandra-topology.properties
>     --------------------------------------------
>     192.168.1.1=dc1:rack1
>     192.168.1.2=dc1:rack1
>     192.168.1.3=dc1:rack1
>
>     192.168.2.1=dc2:rack1
>     192.168.2.2=dc2:rack1
>     192.168.2.3=dc3:rack1
>
>     default=nodc:norack
>
>     cassandra-cli
>     --------------------
>     Keyspace: example:
>       Replication Strategy: org.apache.cassandra.locator.NetworkTopologyStrategy
>       Durable Writes: true
>         Options: [dc1:3, dc2:3]
>
>     nodetool ring
>     -------------------
>
>     Address         DC          Rack        Status State   Load
>     Effective-Ownership Token
>
>
>     159447687142037741049740936276011715300
>     192.168.1.2   dc1          rack1       Up     Normal  111.17 GB
>     100.00%             67165620003619490909052924699950283577
>     192.168.1.1   dc1          rack1       Up     Normal  204.57 GB
>     100.00%             71045951808949151217931264995073558408
>     192.168.2.1   dc2         rack1       Up     Normal  209.92 GB
>     100.00%             107165019770579893816561717940612111506
>     192.168.1.3   dc1          rack1       Up     Normal  209.92 GB
>     100.00%             114165363957966360026729000065495595953
>     192.168.2.3   dc2         rack1       Up     Normal  198.22 GB
>     100.00%             147717787092318068320268200174271353451
>     192.168.2.2   dc2         rack1       Up     Normal  179.31 GB
>     100.00%             159447687142037741049740936276011715300
>
>     Does anyone have any ideas why every server does not have the same
>     amount of data on?
>
>     Thanks,
>
>     Owen

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