Oh and 0.89.... is a major upgrade from 0.20.x... it is NOT 0.20.4. If you are looking to upgrade, 0.90 is it.
-ryan On Fri, Jan 21, 2011 at 1:33 PM, Ryan Rawson <[email protected]> wrote: > Hi, > > Unfortunately the on disk layout of regions in 0.89 and above has > changed, and 0.20.6 cannot read that. > > You should try upgrading to 0.90 if you can! > > If you can't, you will need to use the Export and Import map reduce > jobs to first export the data to sequence files from 0.89, then on the > 0.20.6 cluster use Import. > > Good luck! > -ryan > > On Fri, Jan 21, 2011 at 1:27 PM, Robert Gonzalez > <[email protected]> wrote: >> We are migrating from hbase 0.89.20100621+17 (20.4?) to 20.6 and have >> encountered some type of compatibility problem. To test the migration, we >> deployed 20.6 on a small cluster and copied a table from the >> hdfs:/hbase/tablename directory and re-created it using add_table.rb. We >> first >> tried this with 20.4 on the cluster and everything worked, we were able to >> scan >> the data, verify some contents, etc. When we installed 20.6 on it, the >> procedure was repeated (add_table.rb etc) but the table did not work. We >> were >> getting 0 for count 'tablename', and scans would not find any data. When we >> looked at the hdfs:/hbase/tablename directory, the old regions were there, >> but >> there were new, very short and suspicious "regions" in there with only a >> .regioninfo file in them. Is there a compatibility issue between 20.4 and >> 20.6 >> data? >> >> Note directory listing trimmed to accomodate 80 char limit of maillist >> hbase@c2-m01:/usr/lib/hbase/bin$ hadoop fs -ls /hbase/myurlhash >> Found 16 items >> /hbase/myurlhash0e72138a329fa0c94a49cef92b680592 >> /hbase/myurlhash/1442012393 >> /hbase/myurlhash/1739287575 >> /hbase/myurlhash/1840351287 >> /hbase/myurlhash/188268934 >> /hbase/myurlhash/391140665 >> /hbase/myurlhash/3cffee491242b1502a6298305dfe3495 >> /hbase/myurlhash/406321816 >> /hbase/myurlhash/476529307 >> /hbase/myurlhash/478436003 >> /hbase/myurlhash/55f0dc7eb64684d253cce0f49270a0b4 >> /hbase/myurlhash/6110ff6921f39df866e0f0a4caecc7a6 >> /hbase/myurlhash/648cdaa84dc24e1ad3277c626c2fefbc >> /hbase/myurlhash/9c7d3dceea28e6d385b22970a8d3e516 >> /hbase/myurlhash/a60536a1ea341ce822efc98fc07106df >> /hbase/myurlhash/c8804788fbeb549c1ccfc4c54addc451 >> >> -- >> Robert Gonzalez >> >> >> >
