If I create 3-4 keyspaces, will this impact performance and resources
(esp. memory and disk I/O) too much?
Thanks,
Zhong
On Aug 5, 2010, at 4:52 PM, Benjamin Black wrote:
On Thu, Aug 5, 2010 at 12:59 PM, Zhong Li <[email protected]> wrote:
The big thing bother me is initial ring token. We have some Column
Families.
It is very hard to choose one token suitable for all CFs. Also some
Column
Families need higher Consistent Level and some don't. If we set
Consistency Level is set by clients, per request. If you require
different _Replication Factors_ for different CFs, then just put them
in different keyspaces. Additional keyspaces have very little
overhead (unlike CFs).
ReplicationFactor too high, it is too costy for crossing datacenter,
especially in otherside the world.
I know we can setup multiple rings, but it costs more hardware.
if Cassandra can implement Ring,Token and RF on the CF level, or
even
SuperColumn level, it will make design much easier and more
efficiency.
Is it possible?
The approach I described above is what you can do. The rest of what
you asked is not happening.
b
