mahesh kumar behera created HIVE-19340:
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Summary: Disable timeout of transactions opened by replication
task at target cluster
Key: HIVE-19340
URL: https://issues.apache.org/jira/browse/HIVE-19340
Project: Hive
Issue Type: Sub-task
Components: repl, Transactions
Affects Versions: 3.0.0
Reporter: mahesh kumar behera
Assignee: mahesh kumar behera
Fix For: 3.0.0
h1. Replicate ACID write Events
* Create new EVENT_WRITE event with related message format to log the write
operations with in a txn along with data associated.
* Log this event when perform any writes (insert into, insert overwrite, load
table, delete, update, merge, truncate) on table/partition.
* If a single MERGE/UPDATE/INSERT/DELETE statement operates on multiple
partitions, then need to log one event per partition.
* DbNotificationListener should log this type of event to special metastore
table named "MTxnWriteNotificationLog".
* This table should maintain a map of txn ID against list of tables/partitions
written by given txn.
* The entry for a given txn should be removed by the cleaner thread that
removes the expired events from EventNotificationTable.
h1. Replicate Commit Txn operation (with writes)
Add new EVENT_COMMIT_TXN to log the metadata/data of all tables/partitions
modified within the txn.
*Source warehouse:*
* This event should read the EVENT_WRITEs from "MTxnWriteNotificationLog"
metastore table to consolidate the list of tables/partitions modified within
this txn scope.
* Based on the list of tables/partitions modified and table Write ID, need to
compute the list of delta files added by this txn.
* Repl dump should read this message and dump the metadata and delta files
list.
*Target warehouse:*
* Ensure snapshot isolation at target for on-going read txns which shouldn't
view the data replicated from committed txn. (Ensured with open and allocate
write ID events).
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