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Add the record timestamp. The timestamp is extracted from the row marker of the mutation when we write it. When inserting a record to index, we compare it with the existing record, and insert it only if it has newer timestamp. Add a segment sequence number that is a global (per-shard) increasing number that is allocated when getting a new segment for write, and is written in buffer headers in the segment. It is used to distinguish between buffers written to different generations of a segment, and for recovery to break ties by keeping the record from the newest segment. Refs https://scylladb.atlassian.net/browse/SCYLLADB-770 no backport - logstor is a new feature Closes scylladb/scylladb#29933 * github.com:scylladb/scylladb: test: logstor: add basic delete test logstor: rewrite segment seq num from streaming logstor: add segment sequence number logstor: get_segment helper logstor: compare records by timestamp
Scylla developer documentation
This folder contains developer-oriented documentation concerning the ScyllaDB codebase. We also have a wiki, which contains additional developer-oriented documentation. There is currently no clear definition of what goes where, so when looking for something be sure to check both.
Seastar documentation can be found here.
User documentation can be found on docs.scylladb.com
For information on how to build Scylla and how to contribute visit HACKING.md and CONTRIBUTING.md.