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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-5400) Allow multiple ports to gossip from a single IP address
Date Thu, 04 Apr 2013 18:39:15 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-5400?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13622638#comment-13622638
] 

Jonathan Ellis commented on CASSANDRA-5400:
-------------------------------------------

You can have a compound PK with the (column1, column2) syntax.

inet is a bit niche, but postgresql supports it natively and it's quite nice to have support
for formatting them human-readable (vs 4-byte blob or int).
                
> Allow multiple ports to gossip from a single IP address
> -------------------------------------------------------
>
>                 Key: CASSANDRA-5400
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5400
>             Project: Cassandra
>          Issue Type: New Feature
>    Affects Versions: 2.0
>            Reporter: Carl Yeksigian
>            Assignee: Carl Yeksigian
>             Fix For: 2.0
>
>         Attachments: 5400.txt, 5400-v2.txt, 5400-v3.patch, 5400-v4.patch
>
>
> If a fat client is running on the same machine as a Cassandra node, the fat client must
be allocated a new IP address. However, since the node is now a part of the gossip, the other
nodes in the ring must be able to talk to it. This means that a local only address (127.0.0.n)
won't actually work for the rest of the ring.
> This also would allow for multiple Cassandra service instances to run on a single machine,
or from a group of machines behind a NAT.
> The change is simple in concept: instead of using an InetAddress, use a different class.
Instead of using an InetSocketAddress, which would still tie us to using InetAddress, I've
added a new class, "CassandraInstanceEndpoint". The serializer allows for reading a serialized
Inet4Address or Inet6Address; also, the message service can still communicate with non-CassandraInstanceEndpoint
aware code.

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