Constants§
- DATANODE_
LEASE_ SECS - When creating table or region failover, a target node needs to be selected.
If the node’s lease has expired, the
Selectorwill not select it. - FLOWNODE_
LEASE_ SECS - FRONTEND_
HEARTBEAT_ INTERVAL_ MILLIS - The frontend will also send heartbeats to Metasrv, sending an empty heartbeat every HEARTBEAT_INTERVAL_MILLIS * 6 seconds.
- HEARTBEAT_
INTERVAL_ MILLIS - Heartbeat interval time (is the basic unit of various time).
- MAILBOX_
RTT_ SECS - The default mailbox round-trip timeout.
- META_
KEEP_ ALIVE_ INTERVAL_ SECS - In a lease, there are two opportunities for renewal.
- META_
LEASE_ SECS - The lease seconds of metasrv leader.
- REGION_
LEASE_ SECS - The lease seconds of a region. It’s set by 3 heartbeat intervals (HEARTBEAT_INTERVAL_MILLIS × 3), plus some extra buffer (1 second).