Chen, The main problem is that appends are not supported in HDFS, HBase simply cannot sync its logs to it. But, we did some work to make that story better. The latest revision in the 0.19 branch and 0.20 RC1 both solve much of the data loss problem but it won't be near perfect until we have appends (supposed to be available in 0.21).
J-D On Thu, Aug 6, 2009 at 12:45 AM, Chen Xinli<[email protected]> wrote: > Hi, > > I'm using hbase 0.19.3 on a cluster with 30 machines to store web data. > We got a poweroff days before and I found much web data lost. I have > searched google, and find it's a meta flush problem. > > I know there is much performance improvement in 0.20.0; Is the data lost > problem handled in the new version? > > -- > Best Regards, > Chen Xinli >
