We have two datacenters, DC1 and DC2 in our test cluster. Our write process uses a connection string with just the two hosts in DC1. Our read process uses a connection string just with the two hosts in DC2. We use a PropertyFileSnitch and a property file that 'DC1':2, 'DC2':1 between data centers.
I notice from the read process's logs that the reader adds ALL the hosts (in
both datacenters) to the list of queried hosts.
My question: will the read process try to read first locally from the
datacenter DC2 I specified in its connection string? I presume so. (I
doubt that it uses the client's IP address to decide which datacenter is
closer. And I am unaware of another way to tell it to read locally.)
Also, will read repair happen between datacenters automatically
("read_repair_chance=0.100000")? Or does that only happen within a single data
center?
We're using Cassandra 2.0.4 and CQL.
Thank you
Donald A. Smith | Senior Software Engineer
P: 425.201.3900 x 3866
C: (206) 819-5965
F: (646) 443-2333
dona...@audiencescience.com<mailto:dona...@audiencescience.com>
[AudienceScience]
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