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From Alexandru Sicoe <>
Subject unidirectional communication/replication
Date Fri, 24 Feb 2012 14:21:31 GMT
Hello everyone,

I'm battling with this contraint that I have: I need to regularly ship out
timeseries data from a Cassandra cluster that sits within an enclosed
network, outside of the network.

I tried to select all the data within a certian time window, writing to a
file, and then copying the file out but this hits the I/O performance
because even for a small time window (say 5mins) I am hitting more than a
million rows.

It would really help if I used Cassandra to replicate the data
automatically outside. The problem is they will only allow me to have
outbound traffic out of the enclosed network (not inbound). Is there any
way to configure the cluster or have 2 data centers in such a way that the
data center (node or cluster) outside of the enclosed network only gets a
replica of the data, without ever needing to communicate anything back?

I appreciate the help,

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