Thanks for the response. You got my question correctly. If we are scanning the rows one by one and we have the requested column in the column tracker, we have the row+column to look up in the bloom filter, don't we? We may not be able to filter out the file scanners upfront. But may at the later time and lower level to skip something?
Jerry On Mon, Nov 30, 2015 at 10:55 PM, Stack <[email protected]> wrote: > On Mon, Nov 30, 2015 at 9:56 AM, Jerry He <[email protected]> wrote: > > > Hi, experts > > > > HBASE supports ROWCOL bloom filter. ROW+COL would be the bloom key. > > In most of the documentations, it says only GET would benefit. For > > multi-column as well. > > > > If I do scan with StartRow and EndRow, and also specify columns. > > Would ROWCOL bloom filter provide any benefit in anyway? > > > > > If I understand your question properly, the answer is no. While we might > have a set of columns to check in the bloom, we'd not know the set of rows > between start and end row and so would not be able to formulate a query > against the ROW+COL bloom filter. > > St.Ack > > > > > Thank you. > > > > Jerry > > >
