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From "sankalp kohli (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-12106) Add ability to blacklist a CQL partition so all requests are ignored
Date Wed, 20 Jul 2016 19:51:20 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-12106?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15386505#comment-15386505
] 

sankalp kohli commented on CASSANDRA-12106:
-------------------------------------------

I dont think you are negative here :)
There are cases in which there are large partitions due to spammers, etc which we need to
blacklist for the time being till it is fixed. We cannot have one partition take down the
cluster while it is fixed. Uptime is important and hence this feature. The reason this patch
is big is because we want to make the foundation so that we can automatically blacklist bad
partitions in the future. 

Regarding occurrence of this, this could be very common based on the app using Cassandra.
Also with CASSANDRA-9754, there is still a limit you want CQL partitions to grow. 

Regarding the unit test, Geoff is working on it and will also include a Dtest for this. 

> Add ability to blacklist a CQL partition so all requests are ignored
> --------------------------------------------------------------------
>
>                 Key: CASSANDRA-12106
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-12106
>             Project: Cassandra
>          Issue Type: New Feature
>            Reporter: Geoffrey Yu
>            Assignee: Geoffrey Yu
>            Priority: Minor
>             Fix For: 4.x
>
>         Attachments: 12106-trunk.txt
>
>
> Sometimes reads/writes to a given partition may cause problems due to the data present.
It would be useful to have a manual way to blacklist such partitions so all read and write
requests to them are rejected.



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