Just a few findings when I tried to compile our 0.20.6 based code with this new release:
HConstants is final class now instead of interface RowFilterInterface is gone org.apache.hadoop.hbase.io.Cell is gone org.apache.hadoop.hbase.io.RowResult is gone constructor HColumnDescriptor(byte[],int,java.lang.String,boolean,boolean,int,boolean) is gone Put.setTimeStamp() is gone org.apache.hadoop.hbase.filter.Filter has added getNextKeyHint(org.apache.hadoop.hbase.KeyValue) If you know the alternative to some of the old classes, please share. On Mon, Nov 15, 2010 at 2:51 AM, Stack <[email protected]> wrote: > The first hbase 0.90.0 release candidate is available for download: > > > http://people.apache.org/~stack/hbase-0.90.0-candidate-0/<http://people.apache.org/%7Estack/hbase-0.90.0-candidate-0/> > > HBase 0.90.0 is the major HBase release that follows 0.20.0 and the > fruit of the 0.89.x development release series we've been running of > late. > > More than 920 issues have been closed since 0.20.0. Release notes are > available here: http://su.pr/8LbgvK. > > HBase 0.90.0 runs on Hadoop 0.20.x. It does not currently run on > Hadoop 0.21.0. HBase will lose data unless it is running on an > Hadoop HDFS 0.20.x that has a durable sync. Currently only the > branch-0.20-append branch [1] has this attribute. No official releases > have been made from this branch as yet so you will have to build your > own Hadoop from the tip of this branch or install Cloudera's CDH3 [2] > (Its currently in beta). CDH3b2 or CDHb3 have the 0.20-append patches > needed to add a durable sync. See CHANGES.txt [3] in > branch-0.20-append to see list of patches involved. > > There is no migration necessary. Your data written with HBase 0.20.x > (or with HBase 0.89.x) is readable by HBase 0.90.0. A shutdown and > restart after putting in place the new HBase should be all thats > involved. That said, once done, there is no going back to 0.20.x once > the transition has been made. HBase 0.90.0 and HBase 0.89.x write > region names differently in the filesystem. Rolling restart from > 0.20.x or 0.89.x to 0.90.0RC0 will not work. > > Should we release this candidate as hbase 0.90.0? Take it for a spin. > Check out the doc. Vote +1/-1 by November 22nd. > > Yours, > The HBasistas > P.S. For why the version 0.90 and whats new in HBase 0.90, see slides > 4-10 in this deck [4] > > 1. http://svn.apache.org/viewvc/hadoop/common/branches/branch-0.20-append > 2. http://archive.cloudera.com/docs/ > 3. > http://svn.apache.org/viewvc/hadoop/common/branches/branch-0.20-append/CHANGES.txt > 4. http://hbaseblog.com/2010/07/04/hug11-hbase-0-90-preview-wrap-up/ >
