You can setup a test environment, and have a try. By decrement 1, the replica blocks will be reduced.
Best Regards 金杰 (Jie Jin) On Thu, Nov 7, 2013 at 10:39 AM, ch huang <[email protected]> wrote: > 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? >>> >> >> >
