Home | About | Sematext search-lucene.com search-hadoop.com
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB
 Search Hadoop and all its subprojects:

Switch to Threaded View
HBase >> mail # user >> Help needed! Performance related questions


Copy link to this message
-
Re: Help needed! Performance related questions
>
> 4. Is there any advantage to put rows close in HBase, if these rows
> have a high chance to be queried together?
>
>
Yes.. rows are stored contiguously, sorted by the
RowID+ColFam+ColQual+Timestamp. So, your reads are faster if you access
contiguous rows (and avoid disk seeks).. You can scan a set of rows and
retrieve them..
> 5. Any general rule for row size?
>

If a row is bigger than the max region size you have given, the region wont
split. In other words, rows don't span regions.
>
> 6. Where does the HReigion host the row keys in HFile or other files?
>
>
It is in HFile..
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB