+1 on RC3. Been running this in pre-production without issue for a while.
> -----Original Message----- > From: saint....@gmail.com [mailto:saint....@gmail.com] On Behalf Of Stack > Sent: Friday, January 07, 2011 5:03 PM > To: HBase Dev List > Subject: ANN: The fourth hbase 0.90.0 release candidate is available for > download X > > The fourth hbase 0.90.0 release candidate is available for download: > > http://people.apache.org/~stack/hbase-0.90.0-candidate-3/ > > This is going to be the one! > > Should we release this candidate as hbase 0.90.0? Take it for a spin. > Check out the doc., etc. Vote +1/-1 by next Friday, the 14th of January. > > 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. > > Over 1k 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 nor on Hadoop TRUNK. 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 (See CHANGES.txt [3] in > branch-0.20-append to see the list of patches involved adding an append). > 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. If using CDH, be sure to replace the > hadoop jars that are bundled with HBase with those from your CDH > distribution. > > 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 0.90.0RC1 will not work. > > 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/
