mirror of
https://github.com/zrepl/zrepl.git
synced 2024-11-23 00:43:51 +01:00
b33f670b9d
- drop HintMostRecentCommonAncestor rpc call
- it is wrong to put faith into the active side of the replication to always make that call
(we might not trust it, ref pull setup)
- clean up step holds + step bookmarks + replication cursor bookmarks on
send RPC instead
- this makes it symmetric with Receive RPC
- use a cache (endpoint.sendAbstractionsCache) to avoid the cost of
listing the on-disk endpoint abstractions state on every step
The "create" methods for endpoint abstractions (CreateReplicationCursor, HoldStep) are now fully
idempotent and return an Abstraction.
Notes about endpoint.sendAbstractionsCache:
- fills lazily from disk state on first `Get` operation
- fill from disk is generally only attempted once
- unless the `ListAbstractions` fails, in which case the fill from
disk is retried on next `Get` (the current `Get` will observe a
subset of the actual on-disk abstractions)
- the `Invalidate` method is called
- it is a global (zrepl process-wide) cache
fixes #316
8 lines
177 B
Go
8 lines
177 B
Go
package endpoint
|
|
|
|
import "github.com/prometheus/client_golang/prometheus"
|
|
|
|
func RegisterMetrics(r prometheus.Registerer) {
|
|
r.MustRegister(sendAbstractionsCacheMetrics.count)
|
|
}
|