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From "Jonathan Ellis (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-2369) support replication decisions per-key
Date Thu, 16 Jun 2011 17:17:47 GMT


Jonathan Ellis commented on CASSANDRA-2369:

bq. There is a similar problem on bootstrap and node movement. Instead of asking a single
replica to stream data from the range a new node is assuming, it will have to ask all replicas
that may have rows for that range to make sure it doesn't miss any.

Additionally, each source replica would have to deserialize each row in the range to make
sure it's actually supposed to be streamed, which would slow streaming down significantly.

Starting to think this is not worth trying to support.

> support replication decisions per-key
> -------------------------------------
>                 Key: CASSANDRA-2369
>                 URL:
>             Project: Cassandra
>          Issue Type: New Feature
>            Reporter: Jonathan Ellis
>            Assignee: Vijay
>            Priority: Minor
>             Fix For: 1.0
> Currently the replicationstrategy gets a token and a keyspace with which to decide how
to place replicas.  for per-row replication this is insufficient because tokenization is lossy

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