marco polo created ACCUMULO-4022:
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Summary: Create a concept of multi-homed tablets
Key: ACCUMULO-4022
URL: https://issues.apache.org/jira/browse/ACCUMULO-4022
Project: Accumulo
Issue Type: Wish
Components: client, tserver
Reporter: marco polo
I'm an accumulo newbie, but I wish to see the concept of multi-homed tablets.
This allows us to have tablets hosted by multiple servers, with only one being
writable against it. This concept would allow n receiver servers for a tablet.
An example might be a tablet that has become a hot spot could be dynamically
hosted elsewhere, and clients could pick this up as a potential. Consistency
must be kept between the hosts, as the initial read/write host may compact or
write to that tablet.
To me the larger problem may come from live ingest in which the write ahead log
has not been flushed. To avoid having to write to the read only servers in a
pipeline, we would likely need to create a model of enforcing reads only after
a flush of that tablet or a thrift interface to allow reading only the data in
memory to ensure consistency is enforced. I haven't given great thought to
solving this yet.
Please comment with ideas and pitfalls as I would like to see this wish come to
fruition with actionable tickets after some community thought.
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