Kishore Mohapatra created CASSANDRA-13870:
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Summary: Cassandra reapair 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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