Yuki Morishita created CASSANDRA-19733:
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Summary: Add feature to filter streaming source when bootstrapping
Key: CASSANDRA-19733
URL: https://issues.apache.org/jira/browse/CASSANDRA-19733
Project: Cassandra
Issue Type: Improvement
Components: Cluster/Membership
Reporter: Yuki Morishita
h2. Proposed improvement
Right now, the stream sources for the bootstrap are chosen from the closest
nodes (usually the same rack) of the bootstrapping node.
Add the following system properties so that when bootstrap happens, the node
can choose where to stream data from.
* {{cassandra.bootstrap.include_dcs}}
* {{cassandra.bootstrap.exclude_dcs}}
* {{cassandra.bootstrap.include_sources}}
{{cassandra.bootstrap.include_dcs and }}{{cassandra.bootstrap.exclude_dcs can
take args like "dc1,dc2" to specify DCs or "dc1:rack1,dc1:rack2,..." to specify
DC/Racks.}}
{{cassandra.bootstrap.include_sources is used to specify ip address/port of the
specific nodes to stream from.}}
h2. Motivation
Currently, when the node failure happens in the middle of the major cluster
upgrade, general advice given to the user is to complete the upgrade of the
cluster until all nodes are in the same version, and replace/remove the failed
node. This is because the streaming breaks when there is unsupported SSTable
version streamed from newer to the older.
This approach can create availability issue when two nodes (the failed node
from different rack and the node currently stopped for the upgrade) are down.
With this improvement, the user can replace the failed node using, for example,
specific rack in the same DC or another DC, to eliminate the availability issue
described above.
h2. Note
The user also needs to set "-Dcassandra.skip_schema_check=true" when replacing
the node during the major upgrade to complete the replacement.
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