I think it's worth going at greater lengths to document that kind of "breakage", maybe a page in the book? Stuff like "What's new" and "Incompatibilities" that we can easily link to.
J-D On Mon, Nov 15, 2010 at 12:38 PM, Ryan Rawson <[email protected]> wrote: > That is correct, those classes were deprecated in 0.20, and now gone in 0.90. > > Now you will want to use HTable and Result. > > Also Filter.getNextKeyHint() is an implementation detail, have a look > at the other filters to get a sense of what it does. > > On Mon, Nov 15, 2010 at 12:33 PM, Ted Yu <[email protected]> wrote: >> 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/ >>> >> >
