Benoit, You probably tripped this up? https://issues.apache.org/jira/browse/HBASE-3476
Lars On Wed, Jan 26, 2011 at 5:53 AM, tsuna <tsuna...@gmail.com> wrote: > You can run ``hbase org.apache.hadoop.hbase.io.hfile.HFile -f > "$region" -m'' where $region is every HFile (located under > /hbase/$table/*/$family). This is rather slow [1] for some reason I > don't quite understand, but it's many orders of magnitude faster than > MapReducing the entire table. The output will have information like > "entryCount" (number of cells in this file), "totalBytes" (size of the > uncompressed data), "length" (actual size on disk), "avgKeyLen" > (average number of bytes in a key), "avgValueLen" (average number of > bytes stored in a cell). > > This way you can get detailed information about your table. The > results won't be up-to-date to the second, but they'll be pretty > close. > > > [1] I recently ran this at SU on a table with about 1200 regions and > it took 1h 15m to read the meta data of every HFile. I don't > understand how this can take so much time. > > -- > Benoit "tsuna" Sigoure > Software Engineer @ www.StumbleUpon.com >
