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HBase >> mail # user >> Column Family level bloom filters


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RE: Column Family level bloom filters
>about column family level bloom filters
You mean column blooms right? [Bloom on rowkey & cf+qualifier]
>Are these filters in memory or are they just persisted as part of the HFile or both
All blooms will get persisted while writing the HFile. When the HFile is opened for read the bloom info will be read and will be available in memory.
Only difference is what data is getting added to blooms.

-Anoop-
________________________________________
From: Varun Sharma [[EMAIL PROTECTED]]
Sent: Tuesday, November 06, 2012 7:11 AM
To: [EMAIL PROTECTED]
Subject: Column Family level bloom filters

Hi,

I had a question about column family level bloom filters. Are these filters
in memory or are they just persisted as part of the HFile or both ? For
in-memory bloom filters, deletes could incur a high cost of rebuilding the
bloom filter.

Thanks
VArun