Home | About | Sematext search-lucene.com search-hadoop.com
 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..