Bug #65660
open
mds: drop client metrics during recovery
Added by Patrick Donnelly 23 days ago.
Updated 16 days ago.
Description
When the rank is coming up, there's little reason to record historical metrics from the clients. We've also seen floods of these metrics messages slow down up:rejoin significantly.
Is this new in the upstream master ? As I remembered we have improved this and the clients will only send the metrics when the MDS is ready, which is in active state.
there's little reason to record historical metrics from the clients
Can you expand on this? Are we losing anything by dropping them?
Xiubo Li wrote in #note-1:
Is this new in the upstream master ? As I remembered we have improved this and the clients will only send the metrics when the MDS is ready, which is in active state.
That may be but the MDS should be resilient to older clients.
Christopher Hoffman wrote in #note-2:
there's little reason to record historical metrics from the clients
Can you expand on this? Are we losing anything by dropping them?
The metrics are there to provide a real-time view of performance for clients. Jos or Venky may correct me if I'm wrong but I don't think there is any use for past metrics.
Patrick Donnelly wrote in #note-4:
Christopher Hoffman wrote in #note-2:
there's little reason to record historical metrics from the clients
Can you expand on this? Are we losing anything by dropping them?
The metrics are there to provide a real-time view of performance for clients. Jos or Venky may correct me if I'm wrong but I don't think there is any use for past metrics.
Unless the metrics are persisted by the exporter daemon, which is currently in the works. So, we do not loose anything by dropping them.
Venky Shankar wrote in #note-5:
Patrick Donnelly wrote in #note-4:
Christopher Hoffman wrote in #note-2:
there's little reason to record historical metrics from the clients
Can you expand on this? Are we losing anything by dropping them?
The metrics are there to provide a real-time view of performance for clients. Jos or Venky may correct me if I'm wrong but I don't think there is any use for past metrics.
Unless the metrics are persisted by the exporter daemon, which is currently in the works. So, we do not loose anything by dropping them.
So you mean It'd be fine to have past metrics once they are being persisted by the exporter daemon? So once the exporter daemon is operational, we'd need to have this code adjusted again, right?
Also available in: Atom
PDF