Method applyDelta

fdbclient/include/fdbclient/VersionVector.h:142–161

@note this method, together with method getDelta(), helps minimize the number of version vector entries that get sent from sequencer to grv proxy (and from grv proxy to client) on the read path.

	// the number of version vector entries that get sent from sequencer to
	// grv proxy (and from grv proxy to client) on the read path.
	void applyDelta(const VersionVector& delta) {
		if (delta.maxVersion == invalidVersion) {
			return;
		}

		if (maxVersion >= delta.maxVersion) {
			return;
		}

		if (CLIENT_KNOBS->SEND_ENTIRE_VERSION_VECTOR) {
			*this = delta;
		} else {
			for (const auto& [tag, version] : delta.versions) {
				if (version > maxVersion) {
					setVersionNoCheck(tag, version);
				}
			}
			maxVersion = delta.maxVersion;
		}
	}

	std::string toString() const {
		std::stringstream vector;