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https://issues.apache.org/jira/browse/HIVE-21763?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sankar Hariappan updated HIVE-21763:
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Status: Patch Available (was: Open)
> Incremental replication to allow changing include/exclude tables list in
> replication policy.
> --------------------------------------------------------------------------------------------
>
> Key: HIVE-21763
> URL: https://issues.apache.org/jira/browse/HIVE-21763
> Project: Hive
> Issue Type: Sub-task
> Components: repl
> Reporter: Sankar Hariappan
> Assignee: Sankar Hariappan
> Priority: Major
> Labels: DR, Replication, pull-request-available
> Attachments: HIVE-21763.01.patch
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> - REPL DUMP takes 2 inputs along with existing FROM and WITH clause.
> {code}
> - REPL DUMP <current_repl_policy> [REPLACE <previous_repl_policy> FROM
> <last_repl_id> WITH <key_values_list>;
> - current_repl_policy and previous_repl_policy can be any format mentioned in
> Point-4.
> - REPLACE clause to be supported to take previous repl policy as input. If
> REPLACE clause is not there, then the policy remains unchanged.
> - Rest of the format remains same.
> {code}
> - Now, REPL DUMP on this DB will replicate the tables based on
> current_repl_policy.
> - Single table replication of format <db_name>.t1 doesn’t allow changing the
> policy dynamically. So REPLACE clause is not allowed if previous_repl_policy
> of this format.
> - If any table is added dynamically either due to change in regular
> expression or added to include list should be bootstrapped using independant
> table level replication policy.
> {code}
> - Hive will automatically figure out the list of tables newly included in the
> list by comparing the current_repl_policy & previous_repl_policy inputs and
> combine bootstrap dump for added tables as part of incremental dump.
> "_bootstrap" directory can be created in dump dir to accommodate all tables
> to be bootstrapped.
> - If any table is renamed, then it may gets dynamically added/removed for
> replication based on defined replication policy + include/exclude list. So,
> Hive will perform bootstrap for the table which is just included after rename.
> {code}
> - REPL LOAD should check for changes in repl policy and drop the tables/views
> excluded in the new policy compared to previous policy. It should be done
> before performing incremental and bootstrap load from the current dump.
> - REPL LOAD on incremental dump should load events directories first and then
> check for "_bootstrap" directory and perform bootstrap load on them.
> Rename table is not in scope of this jira.
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