[IGNITE-17372] Implement DeltaFilePageStore

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0-beta1
• Labels: ignite-3
• Epic Link: New PageMemory Persistent Store
• Assignee: Kirill Tkalenko
• Reporter: Kirill Tkalenko
• Reviewer: Ivan Bessonov
• Created: 14/Jul/22 07:30
• Updated: 13/Oct/22 12:00
• Resolved: 28/Jul/22 08:50

Description

For the new checkpoint, we need to implement DeltaFilePageStore.

Will consist of:

• File header, similar to FilePageStore, but in addition it will store a sorted list of pageIdx in which it will be stored;
• Pages themselves, sorted by pageIdx.

Some implementation notes

• Format of the file name for the DeltaFilePageStore is part-%d-delta-%d.bin for example part-1-delta-3.bin where the first digit is the partition identifier, and the second is the serial number of the delta file for this partition;
• Before creating part-1-delta-3.bin, a temporary file part-1-delta-3.bin.tmp will be created at the checkpoint first, then filled, then renamed to part-1-delta-3.bin;
• In each delta file we will store the org.apache.ignite.internal.storage.pagememory.io.PartitionMetaIo, which will be the first page in this file, and it will be special.

Issue Links

• is related to: IGNITE-17230 Support split-file page store
• links to: GitHub Pull Request #947