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Hadoop, mail # user - Re: issue about add disk on DN


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Re: issue about add disk on DN
ch huang 2013-11-07, 02:39
这个好像不太合理吧,如果我原来3块盘的话,变成6块盘需要由3个拷贝改成六个拷贝?
那我如果弄完后改回3个拷贝原来的数据还是存6拷贝的呀,那不是浪费空间?

On Thu, Nov 7, 2013 at 9:44 AM, 金杰 <[EMAIL PROTECTED]> wrote:

>  yes, you can rebalance them. try hdfs rebalance. Or, you can first
> increment the replica by 1, then decrement by 1.
>
>
> Best Regards
> 金杰 (Jay Jin)
>
>
> On Thu, Nov 7, 2013 at 8:34 AM, ch huang <[EMAIL PROTECTED]> wrote:
>
>> hi,all:
>>         i have a DN,and i mount the two disk ,one disk for
>> /data/dataspace/1, and one disk for /data/dataspace/2,
>> the two disk is almost full, so i add a new disk,and modify the config
>> file,now
>> disk3 mount on /data/dataspace/3 , is it possible even distribution of
>> data on the three disks?
>>
>
>