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From Edward Capriolo <edlinuxg...@gmail.com>
Subject Re: how to recover cassandra data
Date Mon, 02 Aug 2010 14:30:46 GMT
On Mon, Aug 2, 2010 at 9:11 AM, john xie <shanfenggood@gmail.com> wrote:
> ReplicationFactor = 3
> one day i stop 192.168.1.147 and remove cassandra data by mistake, can i
> recover  192.168.1.147's cassadra data by restart cassandra ?
>
>
>    <DataFileDirectories>
>         <DataFileDirectory>/data1/cassandra/</DataFileDirectory>
>         <DataFileDirectory>/data2/cassandra/</DataFileDirectory>
>         <DataFileDirectory>/data3/cassandra/</DataFileDirectory>
>     </DataFileDirectories>
> /data3  mount  /dev/sdd
> i remove /data3 and  formatt /dev/sdd
>
> Address       Status     Load          Range
>      Ring
>
> 135438270110006521520577363629178401179
> 192.168.1.148 Up         50.38 GB
>  52435029392953385124849742453833332898     |<--|
> 192.168.1.145 Up         48.38 GB
>  63161078970569359253391371326773726097     |   |
> 192.168.1.147 ?          23.5 GB
> 79546317728707787532885001681404757282     |   |
> 192.168.1.146 Up         26.34 GB
>  135438270110006521520577363629178401179    |-->|
>
>
>
>
>
>

Since you have a replication factor of three if you bring a new node
through auto-bootstrap data will migrate back to it since it has two
copies. Nothing is lost.

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