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From "Jeff Jirsa (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-13870) Cassandra repair process in Low Bandwidth Network
Date Thu, 14 Sep 2017 20:43:00 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-13870?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16166942#comment-16166942
] 

Jeff Jirsa commented on CASSANDRA-13870:
----------------------------------------

Hi [~kmohapatra] 

Generally speaking, this JIRA is for bug reports and feature requests. For user support, you
should consider the user (or occasionally dev) mailing lists:

http://cassandra.apache.org/community/

I'd like to close this in a bit, unless you believe your question is really a feature request
or bug report.




> Cassandra repair process in Low Bandwidth Network
> -------------------------------------------------
>
>                 Key: CASSANDRA-13870
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-13870
>             Project: Cassandra
>          Issue Type: Task
>            Reporter: Kishore Mohapatra
>            Priority: Trivial
>
> Hi, 
> we have a cassandra cluster with 7 nodes each in 3 datacenters. 
> Network bandwidth between DC1 and DC2 is very good (10Gbit/s) and a dedicated one. However
network pipe between DC1 and DC3 and between Dc2 and DC3 is very poor and has only 100 MBit/s
and also goes thru VPN network. Each node contains about 100 Gb of data and has a RF of 3.
Whenever we run the repair, it fails with streaming errors and never completes.
> I could repair either just in the local dc or just the first two DCs. Can not repair
DC3 when i combine with the other two DCs.
> So how can i succesfully repair the keyspace in these kind of environments ?
> I see that there is a parameter to throttle the  inter-dc stream thruput, which default
to 200 MBit/s. So what is the minimum threshold that i could set it to  without affecting
the cluster ?
> Is there any other way to work in these kind of envornments ?
> I will appreciate your feedback and help on this.
> Thanks
> Kishore



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