stack created HBASE-20828:
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Summary: Finish-up AMv2 Design/List of Tenets/Specification of
operation
Key: HBASE-20828
URL: https://issues.apache.org/jira/browse/HBASE-20828
Project: HBase
Issue Type: Umbrella
Components: amv2
Reporter: stack
AMv2 is missing specification. There are too many grey-areas still. Also
missing are a concise listing of the tenets of AMv2 operation. Here are some
examples:
* HBASE-19529 "Handle null states in AM": Asks how we should treat null state
in hbase:meta. What does it 'mean'. We seem to treat it differently dependent
on context. Needs clarification. [~Apache9] recently asked similar about the
meaning of OFFLINE.
* Logging needs to have a particular form to help trace Procedure progress;
needs a write-up.
Lets fill in items to address in this umbrella issue. Can address in subissues
and produce specification doc too. We have the below but these are mostly
(incomplete) description for devs on pv2 and amv2; the specification is missing:
http://hbase.apache.org/book.html#pv2
http://hbase.apache.org/book.html#amv2
(Other areas include addressing what is up w/ rollback -- when, how much, and
when it is not appropriate -- as well as recommendation on Procedures
coarseness, locking -- is it ok to lock table in alter table procedure for the
life of the procedure? -- and so on).
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