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From Roland Hänel <rol...@haenel.me>
Subject Re: when i use the OrderPreservingPartition, the load is very imbalance
Date Mon, 26 Apr 2010 10:13:36 GMT
sorry, if specifying the token manually, use:

  bin/nodetool -h <host> move <new-token>


2010/4/26 Roland Hänel <roland@haenel.me>

> 1) you can re-balance a node with
>
>      bin/nodetool -h <host> token [<new-token>]
>
> specify a new token manually or let the system guess one.
>
> 2) take a look into your system.log to find out why your nodes are dying.
>
>
> 2010/4/26 刘兵兵 <rucbing@gmail.com>
>
> i do some INSERT ,because i will do some scan operations, i use the
>> OrderPreservingPartition method.
>>
>> the state of the cluster is showed below.
>>
>> as i predicated the load is very imbalance, and some of the nodes down (in
>> some nodes,the Cassandra processes died and in others the processes are
>>
>> alive but they still down),
>>
>> so i have two questions:
>>
>> 1)how to do balance after the insert ends?
>>
>> 2)why the nodes died? how to make them up again (when the situation is
>> that the process is alive but the node'state is down)
>>
>> thx
>>
>> 10.37.17.241  Up         47.65 GB
>> 0p6ovvUXMJ4cdd1L                           |<--|
>> 10.37.17.234  Up         67.41 GB
>> 5OxiS2DKBZLeISPg                          |   ^
>> 10.37.17.235  Up         67.54 GB
>> 7UDcS0SToePuQACe                         v   |
>> 10.37.17.246  Up         555 bytes
>> OCvC3nqKLeKA5n0I                           |   ^
>> 10.37.17.233  Up         830 bytes
>> SJp6cQRNox52av2Y                           v   |
>> 10.37.17.249  Up         830 bytes
>> SxVmCVcruOpoS48B                           |   ^
>> 10.37.17.247  Up         555 bytes
>> TGctCMvfNuRo7RjS                           v   |
>> 10.37.17.245  Up         555 bytes
>> j2smY0OOtQ0SeeHY                           |   ^
>> 10.37.17.250  Up         830 bytes
>> jNwBPchW58i5tGxp                           v   |
>> 10.37.17.248  Up         830 bytes
>> jYWaJC93OyMdWDaN                           |   ^
>> 10.37.17.237  Up         830 bytes
>> mPwhLOsKlbPart6j                           v   |
>> 10.37.17.236  Up         830 bytes
>> noh0t8HJgw4hmz7I                           |   ^
>> 10.37.17.244  Up         555 bytes
>> q8c8SPYEkWEzmFcR                           v   |
>> 10.37.17.238  Up         555 bytes
>> rIuuq3AR4DVK989X                           |   ^
>> 10.37.17.242  Up         555 bytes
>> smebTmIvQBMG56Zf                           v   |
>> 10.37.17.243  Up         555 bytes
>> tWTYyiqAKQVw7197                           |   ^
>> 10.37.17.232  Up         830 bytes
>> uVdBQkR9Dszm5deK                           v   |
>> 10.37.17.239  Up         555 bytes
>> xXQkDQn1vvg8e1xS                           |   ^
>> 10.37.17.240  Up         555 bytes
>> yQRrq9RG2dUsHUyR                           |-->|
>>
>>
>> --
>> Bingbing Liu
>>
>> Web and Mobile Data Management lab
>>
>> Renmin University  of  China
>>
>
>

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