"This series tries to improve the bootstrap of a node in a large cluster by
improving how gossip applies the gossip node state. In #2404, the joining node
failed to bootstrap, because it did not see the seed node when
storage_service::bootstrap ran. After this series, we apply the whole gossip
state contained in the gossip ack/ack2 message before applying the next one,
and we apply the state of the seed node earlier than non-seed node so we can
have the seed node's state faster. We also add some randomness to the order of
applying gossip node state to prevent some of the nodes' state are always
applied earlier than the others.
This series improves apply_state_locally for large cluster:
- Tune the order of applying endpoint_state
- Serialize apply_state_locally
- Avoid copying of the gossip state map
Fixes#2404"
* tag 'asias/gossip_issue_2404_v2' of github.com:scylladb/seastar-dev:
gossip: Avoid copying with apply_state_locally
gossip: Serialize apply_state_locally
gossip: Tune the order of applying endpoint_state in apply_state_locally
gossip: Introduce is_seed helper
gossip: Pass const endpoint_state& in notify_failure_detector
gossip: Pass reference in notify_failure_detector
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