Just reading up on boonfilters, few questions.
Basically boonfilters let give you a true/false if a particular key exists,
and they *may* give you a false positive i.e. they key exists but never a
false negative i.e. the key doesn't exist.
The core of boonfilters is its hashing mechanism that marks the in-memory
matrix/map if the key exists.
1. Is the only place boonfilters are used in Cassandra is when you want to
see if a particular key exists in a particular node?
2. Are boonfilters a fixed size, or they adjust as to the # of keys? any
example size?
3. Boonfilters don't give false negatives:
So you hit a node, and perform a lookup in the boonfilter for a key. It
says "yes", but when you do a lookup the object returned is null, so then
you flag that this node needs this particular key during replication.
Have I grasp this concept?
Really loving this project, learning allot from the code. It would be great
if someone could do a walkthrough of common functionality in a detailed way
:)
