kv: support migration between lease types #125241
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A-kv-replication
Relating to Raft, consensus, and coordination.
A-leader-leases
Related to the introduction of leader leases
C-enhancement
Solution expected to add code/behavior + preserve backward-compat (pg compat issues are exception)
T-kv
KV Team
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nvanbenschoten
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C-enhancement
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nvanbenschoten
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Sep 19, 2024
Fixes cockroachdb#125241. This commit adds support for switching between epoch-based leases and leader leases dynamically, based on the current values of the following two cluster settings: * `kv.raft.leader_fortification.fraction_enabled` (public) * `kv.leases.leader_leases.enabled` (private) When either of these settings is changed, the lease queue will start switching the types of leases that no longer match their range's desired lease type. These changes will be spread across a scanner cycle, so we shouldn't see serious disruption to the cluster. Release note: None
craig bot
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Sep 26, 2024
130700: kv: support migration between lease types r=nvanbenschoten a=nvanbenschoten Fixes #125241. This commit adds support for switching between epoch-based leases and leader leases dynamically, based on the current values of the following two cluster settings: * `kv.raft.leader_fortification.fraction_enabled` (public) * `kv.leases.leader_leases.enabled` (private) When either of these settings is changed, the lease queue will start switching the types of leases that no longer match their range's desired lease type. These changes will be spread across a scanner cycle, so we shouldn't see serious disruption to the cluster. Release note: None Co-authored-by: Nathan VanBenschoten <[email protected]>
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Part of #123847.
It should be possible and safe to switch back and forth between epoch-based leases and leader leases.
Jira issue: CRDB-39332
Epic CRDB-37522
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