-1 for the following bug: https://issues.apache.org/jira/browse/HBASE-3445
Note however that aside from this issue RC 3 looks pretty stable: * All HBase tests pass (on a Mac) * All hbase-trx tests pass after I upgraded https://github.com/hbase-trx/hbase-transactional-tableindexed * All tests pass in our web app. * Our application performs well on local machine. * Still todo after 3445 fixed: Full cluster testing James Kennedy On 2011-01-07, at 5:03 PM, Stack wrote: > 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/
