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From Eldad Yamin <elda...@gmail.com>
Subject Cassandra Secondary index/Twissandra
Date Sat, 09 Jul 2011 19:15:00 GMT
Hi,
I have few questions:

*Secondary index*

   1. Is there a limit on the number of columns in a single column family
   that serve as secondary indexes?
   2. Does performance decrease (significantly) if the uniqueness of the
   column’s values is high?


*Twissandra*

   1. Why in the source (or any tutorial I've read):
   The CF for "Userline"/"Uimeline" - have comparator of "LONG_TYPE" and not
   TimeUUID?

   https://github.com/twissandra/twissandra/blob/master/tweets/management/commands/sync_cassandra.py
   2. Does performance decrease (significantly) if the uniqueness of the
   column’s name is high when comparator is LONG_TYPE/TimeUUID and each row has
   lots of columns?


Thanks!
Eldad

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