Fix the async commit - Githubissues

sirixdb / sirix

SirixDB is an an embeddable, bitemporal, append-only database system and event store, storing immutable lightweight snapshots. It keeps the full history of each resource. Every commit stores a space-efficient snapshot through structural sharing. It is log-structured and never overwrites data. SirixDB uses a novel page-level versioning approach.

BSD 3-Clause "New" or "Revised" License

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See the async-commit branch and the JsonNodeTrxAsyncCommitTest integration tests. There's currently one or more race conditions...

Notes:

PageReferences can't be copied, they have to be shared between the former revision (going to be written to disk) and the new revision (kept in an in-memory trx intent log), as some keys or none at all may be written to disk at that point (thus, stored, once it's written to disk -- storing the file offset).
The List of PageFragments must create a new PageReference for the former revision, as otherwise the PageReference would store the new key/offset once it's written to disk.

sirixdb / sirix

Fix the async commit #716