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From Varun Sharma <va...@pinterest.com>
Subject Re: Issues with delete markers
Date Sun, 30 Jun 2013 19:35:57 GMT
I tried this a little bit and it seems that filters are not called on
delete markers. For raw scans returning delete markers, does it make sense
to do that ?

Varun


On Sun, Jun 30, 2013 at 12:03 PM, Varun Sharma <varun@pinterest.com> wrote:

> Hi,
>
> We are having an issue with the way HBase does handling of deletes. We are
> looking to retrieve 300 columns in a row but the row has tens of thousands
> of delete markers in it before we span the 300 columns something like this
>
>
> row  DeleteCol1 Col1  DeleteCol2 Col2 ................... DeleteCol3 Col3
>
> And so on. Therefore, the issue here, being that to retrieve these 300
> columns, we need to go through tens of thousands of deletes - sometimes we
> get a spurt of these queries and that DDoSes a region server. We are okay
> with saying, only return first 300 columns and stop once you encounter, say
> 5K column delete markers or something.
>
> I wonder if such a construct is provided by HBase or do we need to build
> something on top of the RAW scan and handle the delete masking there.
>
> Thanks
> Varun
>
>
>

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