zrepl/endpoint/endpoint_metrics.go

package endpoint

import "github.com/prometheus/client_golang/prometheus"

func RegisterMetrics(r prometheus.Registerer) {
	r.MustRegister(sendAbstractionsCacheMetrics.count)
}
[#316] endpoint / replication protocol: more robust step-holds and replication cursor management - 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 2020-05-10 15:06:44 +02:00			`package endpoint`

			`import "github.com/prometheus/client_golang/prometheus"`

			`func RegisterMetrics(r prometheus.Registerer) {`
			`r.MustRegister(sendAbstractionsCacheMetrics.count)`
			`}`