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| author | Wenbin Zhu <wenbin.zhu@mongodb.com> | 2021-10-06 17:35:35 +0000 |
|---|---|---|
| committer | Evergreen Agent <no-reply@evergreen.mongodb.com> | 2021-10-06 19:07:14 +0000 |
| commit | e9e18132e3342afd815033e7629041c37c07118b (patch) | |
| tree | be49568a22b9c23b95d4a093ce105b9ad8d2e368 | |
| parent | 35d5a6fc01fbe994873024c4f44d0bc4da9d6a1e (diff) | |
| download | mongo-e9e18132e3342afd815033e7629041c37c07118b.tar.gz | |
SERVER-59041 Update replication architecture guide for the relaxed voting constraint.
| -rw-r--r-- | src/mongo/db/repl/README.md | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/src/mongo/db/repl/README.md b/src/mongo/db/repl/README.md index 949a2ae4ac3..3cf67a21f1b 100644 --- a/src/mongo/db/repl/README.md +++ b/src/mongo/db/repl/README.md @@ -477,9 +477,11 @@ The receiving node's `TopologyCoordinator` updates the last time it received a h sending node for liveness checking in its `MemberData` list. If the sending node's config is newer than the receiving node's, then the receiving node schedules a -heartbeat to get the config. The receiving node's `TopologyCoordinator` also updates its -`MemberData` with the last update from the sending node and marks it as being up. See more details on -config propagation via heartbeats in the [Reconfiguration](#Reconfiguration) section. +heartbeat to get the config, except when the receiving node is [in primary state but cannot accept +non-local writes](https://github.com/mongodb/mongo/blob/04777b82b0e0f7f83b99f1c837816bc93ba4d23b/src/mongo/db/repl/replication_coordinator_impl_heartbeat.cpp#L610-L618). +The receiving node's `TopologyCoordinator` also updates its `MemberData` with the last update from +the sending node and marks it as being up. See more details on config propagation via heartbeats in +the [Reconfiguration](#Reconfiguration) section. It then creates a `ReplSetHeartbeatResponse` object. This includes: @@ -1821,9 +1823,8 @@ will be "newer" than any other config in the system. Config ordering also affects voting behavior. If a replica set node is a candidate for election in config `(vc, tc)`, then a prospective voter with config `(v, t)` will only cast a vote for the -candidate if `(vc, tc) = (v, t)`. For correctness, it would be acceptable for a candidate to cast -its vote whenever `(vc, tc) >= (v, t)`, but the current implementation is more restrictive. For a -description of the complete voting behavior, see the [Elections](#Elections) section. +candidate if `(vc, tc) >= (v, t)`. For a description of the complete voting behavior, see the +[Elections](#Elections) section. ### Formal Specification |