Update scheduler.md

scheduler.md

@@ -1,13 +1,26 @@
-# Task manager
+# Job manager
 
-> Coming soon! Currently under active development.
-
-Scheduler is not yet accessible through the UI (4.9), but we the back-end is ready!
+> Job manager is released since 4.10
 
 The key idea is to be able to schedule any action (migrate, reboot etc.), like for backups, snapshots or DR.
 
 ## Examples
 
-Do you ever wanted to plan a migration of your VMs from a host to another? Let's say every night at 11:00PM, let's do this, then shutdown the big noisy server.
+### Save on your electric bill
 
-At 06:00AM, start the big server, and 10 minutes later, migrate the same VM back.
+* plan a live migration on your VMs at 11:00PM on a less powerful host, to shutdown the big one
+* start the big server at 6:00AM and migrate back VMs 15 minutes later
+
+### Scale when needed
+
+* schedule the boot of extra-VMs during your usual activity spikes (horizontal scaling)
+* also plan more vCPUs or RAM to these VMs at the same time
+* go back to the previous state when your planned load is low (e.g: during the night)
+
+### Planned reboot
+
+* your client app is not very stable, or you need to reboot every month after kernel updates: schedule this during the weekend!
+
+### Test DR
+
+* thanks to the DR feature of Xen Orchestra, you can also schedule a boot of your DR'ed VMs: this way, your DR plan can be auto-tested!