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HBase >> mail # user >> Help needed! Performance related questions

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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..