yes ,but if one of disks is full,the totol io bandwidth also will reduce On Thu, Nov 7, 2013 at 11:31 AM, Andrew Wright <[email protected]> wrote:
> It is possible to rebalance across hosts but I do not believe it is > possible to rebalance within a data node. Best chance to decommission the > host have all the data redistribute to other nodes and then add the node > back into the cluster and rebalance then. > > Also, the dn will identify when the individual dura are full and no longer > allow writes to the disks. > > > On Wednesday, November 6, 2013, ch huang 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? >>>> >>> >>> >>
