Alexey Goncharuk created IGNITE-5322:
----------------------------------------
Summary: Improve WAL record/iterator structure
Key: IGNITE-5322
URL: https://issues.apache.org/jira/browse/IGNITE-5322
Project: Ignite
Issue Type: Improvement
Components: cache
Affects Versions: 2.1
Reporter: Alexey Goncharuk
Fix For: 2.1
Currently, we rely on the WAL files layout and zero-ing to make a decision when
to stop the iteration.
Instead, we should write a WAL Pointer to each record with it's position in the
file. This will allow us to verify that we are reading a consistent records
sequence and should also remove a requirement for zero-clean WAL segment.
When iterating over the WAL, we should calculate expected next WAL pointer and
check that read pointer is equal to the read. If we found a difference, this
means that we encountered a stale segment and can stop the iteration.
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
