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From Subrahmanya Harve <>
Subject Re: questions on frequency and timing of async replication between DCs
Date Fri, 11 Nov 2011 23:35:50 GMT
If i query by list command, i do see the data i am looking for.
Interestingly, if do list on each of the nodes using cli, i get back a
different number of rows!
i did not want to query by ALL because of 2 reasons - 1. It might take too
long to return. 2 it might not return me anything just because a node was
temporarily down?
any idea whats going on here?
i am also wondering if anyone has gone to production with cross-dc using
0.8.7 and how its working out? lessons learnt, etc

On Fri, Nov 11, 2011 at 2:55 PM, Jeremiah Jordan <> wrote:

> If you query with ALL do you get the data?  If you query with a range
> slice do you get the data (list from the cli)?
> On 11/11/2011 04:10 PM, Subrahmanya Harve wrote:
>> I have cross dc replication set up using 0.8.7 with 3 nodes on each DC by
>> following the +1 rule for tokens.
>> I am seeing an issue where the insert into a DC happened successfully but
>> on querying from cli or through Hector, i am not seeing the data being
>> returned. i used cli on every node of both DCs and every node returned
>> blank. So basic question is where is my data? CL.WRITE=ONE, CL.READ=1. RF =
>> DC:2, DC:2
>> Apart from checking the data directory size on each DC to verify that
>> cross-dc replication has happened, what others steps can i take to verify
>> that cross dc replication is happening successfully? What tuning params can
>> i control with regard to cross-dc replication? (frequency? batch size?, etc)
>> would greatly appreciate any help.

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