[AMQ-5578] preallocate journal files

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 5.11.0
• Fix Version/s: 5.14.0
• Component/s: Message Store
• Labels: journal kahaDB perfomance
• Assignee: Gary Tully
• Reporter: Gary Tully
• Created: 11/Feb/15 13:18
• Updated: 08/Aug/24 16:09
• Resolved: 29/Apr/16 16:11

Description

Our journals are append only, however we use the size to track journal rollover on recovery and replay. We can improve performance if we never update the size on disk and preallocate on creation.
Rework journal logic to ensure size is never updated. This will allow the configuration option from https://issues.apache.org/jira/browse/AMQ-4947 to be the default.

Issue Links

• is related to: AMQ-9547 KahaDB PageFile can call setLength() on the recovery file which always throws an exception
• is related to: AMQ-4947 Reduce the reliance on fsync when writing to disk
• relates to: AMQ-5603 Consider preallocation of journal files in batch increments