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From vineet daniel <vineetdan...@gmail.com>
Subject Re: How do you, Bloom filter of the false positive rate or remove the problem of distributed databases?
Date Tue, 04 May 2010 09:08:09 GMT
Reduce GCGraceSeconds in storage.conf, that should work.


On Tue, May 4, 2010 at 2:31 PM, vineet daniel <vineetdaniel@gmail.com>wrote:

> Only major compactions can clean out obsolete tombstones.
>
> On Tue, May 4, 2010 at 9:59 AM, Jonathan Ellis <jbellis@gmail.com> wrote:
>
>> On Mon, May 3, 2010 at 8:45 PM, Kauzki Aranami <kazuki.aranami@gmail.com>
>> wrote:
>> > Let me rephrase my question.
>> >
>> > How does Cassandra deal with bloom filter's false positives on deleted
>> records?
>>
>> The same way it deals with tombstones that it encounters otherwise
>> (part of a row slice, or in a memtable).
>>
>> All the bloom filter does is keep you from having to check rows that
>> don't have any data at all for a given key.  Tombstones are not the
>> same as "no data at all," we do need to propagate tombstones during
>> replication.
>>
>> --
>> Jonathan Ellis
>> Project Chair, Apache Cassandra
>> co-founder of Riptano, the source for professional Cassandra support
>> http://riptano.com
>>
>
>

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