[PATCH datacenter-manager 6/6] task cache: poll known active tasks every 30 seconds

[Lukas Wagner <l.wagner@proxmox.com>]

Since we now have to fetch active tasks anyway to avoid gaps in the
task archive, we might as well lower the polling interval for any known
active tasks to a smaller interval of 30 seconds. This should be a nice
compromise between avoid too many requests and realtime-ness.

The general polling interval for active and archived tasks is still set
to 10 minutes, meaning any task that starts and finishes between polls
is not actively polled. These would simply appear as 'finished' when the
next 10 minute poll is done. Only tasks that are active when this
regular poll happens are affected; the lower polling interval mainly
ensures that any active task does not appear stuck until the next
regular poll happens.

Tasks that were started by PDM, so called 'tracked tasks', continue to
be polled every 10 seconds. These have arguably stricter requirements to
perceived responsiveness.

Signed-off-by: Lukas Wagner <l.wagner@proxmox.com>
---
 server/src/remote_tasks/refresh_task.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/server/src/remote_tasks/refresh_task.rs b/server/src/remote_tasks/refresh_task.rs
index c3b005ce..632b7d52 100644
--- a/server/src/remote_tasks/refresh_task.rs
+++ b/server/src/remote_tasks/refresh_task.rs
@@ -28,7 +28,7 @@ const TASK_FETCH_INTERVAL: Duration = Duration::from_secs(600);
 // NOTE: Since we at the moment never query active tasks from remotes, this is merely a safeguard
 // to clear stuck active tasks from a previous bug. If we at some point query active tasks, we
 // might lower this interval.
-const POLL_ACTIVE_INTERVAL: Duration = Duration::from_secs(600);
+const POLL_ACTIVE_INTERVAL: Duration = Duration::from_secs(30);
 
 /// Interval at which to check for task cache rotation.
 const CHECK_ROTATE_INTERVAL: Duration = Duration::from_secs(3600);
-- 
2.47.3