Nick Bailey created CASSANDRA-7779:
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Summary: Add option to sstableloader to only stream to the local dc
Key: CASSANDRA-7779
URL: https://issues.apache.org/jira/browse/CASSANDRA-7779
Project: Cassandra
Issue Type: Improvement
Components: Tools
Reporter: Nick Bailey
Fix For: 1.2.19, 2.0.10, 2.1.1
This is meant to be a potential workaround for CASSANDRA-4756. Due to that
ticket, trying to load a cluster wide snapshot via sstableloader will
potentially stream an enormous amount of data. In a 3 datacenter cluster with
rf=3 in each datacenter, 81 copies of the data would be streamed. Once we have
per range sstables we can optimize sstableloader to merge data and only stream
one copy, but until then we need a workaround. By only streaming to the local
datacenter we can load the data locally in each datacenter and only have 9
copies of the data rather than 81.
This could potentially be achieved by the option to ignore certain nodes that
already exists in sstableloader, but in the case of vnodes and topology changes
in the cluster, this could require specifying every node in the cluster as
'ignored' on the command line which could be problematic. This is just a
shortcut to avoid that.
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