Hi Hari, The filters are applied server side (aka predicate pushdown). If you were to scan and skip you incur extra IO cost. Filters, as they are implemented right now are simply skipping and therefore all they can do is slightly improve a normal scan performance. In the future you might get better performance as they are re-implemented as Coprocessors. Also, depending on certain filter criteria we can optimize scans by skipping entire store files (since we know it does not certain keys or timestamp based values).
Lars On Sun, Dec 5, 2010 at 6:39 PM, Hari Sreekumar <hsreeku...@clickable.com> wrote: > Hi > > What are the differences between using a scan filter and simpli > scanning and then filtering using if conditions? Any particular > gotchas you need to be careful about while using filters extensively? > > Hari >
