[jira] [Updated] (CASSANDRA-9876) One way targeted repair

["Geoffrey Yu (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-9876?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Geoffrey Yu updated CASSANDRA-9876:
-----------------------------------
    Attachment: 9876-trunk.txt

I've attached a patch that should add in what is described in the ticket. Specifically, it adds a new option {{--pull-repair}} to {{nodetool repair}} that can be used as follows:

{{nodetool repair --in-hosts <host1>,<host2> --start-token <start> --end-token <end> --pull-repair}}

Suppose {{<host1>}} is the node where the command is being run. Then {{<host1>}} will only request data from {{<host2>}} during the streaming step (if there is a mismatch) but will not send any data to {{<host2>}}. 

The node where the command is being run must one of the two nodes specified by {{--in-hosts}}. And of course the token range specified must be a range that both nodes own.

> One way targeted repair
> -----------------------
>
>                 Key: CASSANDRA-9876
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9876
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: sankalp kohli
>            Assignee: Geoffrey Yu
>            Priority: Minor
>         Attachments: 9876-trunk.txt
>
>
> Many applications use C* by writing to one local DC. The other DC is used when the local DC is unavailable. When the local DC becomes available, we want to run a targeted repair b/w one endpoint from each DC to minimize the data transfer over WAN.  In this case, it will be helpful to do a one way repair in which data will only be streamed from other DC to local DC instead of streaming the data both ways. This will further minimize the traffic over WAN. This feature should only be supported if a targeted repair is run involving 2 hosts.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)