Great questions. For #2, I think hadoop append feature is for durability.
>From master log, you would see: 2011-02-11 00:34:09,494 INFO org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogWriter: Using syncFs -- HDFS-200 2011-02-11 00:34:09,495 INFO org.apache.hadoop.hbase.regionserver.wal.HLog: Using getNumCurrentReplicas--HDFS-826 Please check your hadoop distribution to see whether the JIRAs above are supported. I recently had some success using cdh3b2 for hbase 0.90.1 I think you can use cdh3b2 or cdh3b3. Cheers On Sat, Feb 12, 2011 at 1:10 PM, Oleg Ruchovets <oruchov...@gmail.com>wrote: > Hi , > We are going to port our production environment to 0.90 and I have couple > of questions: > 1) We are using HTablePool which returned HTable in version 0.20.3 , but > now > it returns HTableInterface > In our code we used HTable class methods : > > getStartEndKeys(); > setAutoFlush(false); > setWriteBufferSize(); > .... > > The question is : what is the idea to use interface which hide access to > the most HTable methods? > Actually I can cast (HTable)HBaseInterface and use all methods that I need > but it looks ugly solution. > What is the way to write data to hbase using WriteBufferSize ( > setAutoFlush(false) , setWriteBufferSize()) and using HTablePool in 0.90? > > 2) Our hbase 0.20.3 installation runs over hadoop 0.21. As I understand > hbase 0.90 uses hadoop-core-0.20-append-r1056497 version. > Is it correct that only this version have to be used or hbase 0.90 > suports hadoop 0.20.X too? Simply we were very happy with hadoop 0.21 and > never tested 0.20-append. > > > Oleg. >
