I am trying to implement High Availability in appian, How can we make sure

Mangesh Vidhale

A Score Level 2

over 8 years ago

I am trying to implement High Availability in appian,
How can we make sure that the timer event based processes handled in this situation.
For e.g Primary appian on machine A, Backup appian running on machine B.
Timer based set in Primary appian (machine A) then what happens if appian goes down on Machine A
then how timer based processes get triggered on Machine B.
Response is appreciated...

Discussion posts and replies are publicly visible

0 Eduardo Fuentes
Appian Employee
over 8 years ago

What kind of High Availability are you using? Is machine B running at the same time as machine A or will it be launched once machine A is down?
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel
0 Mangesh Vidhale
A Score Level 2
over 8 years ago

Yes Eduardo.. I am trying machine B running at the same time as machine A.
What are the recommendations from appian, is that machine B will launch when machine A is down..?
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel
0 Eduardo Fuentes
Appian Employee
over 8 years ago

If they are both running then they'll be in sync all the time and the timer shouldn't be a problem. It'll be kicked off at the right time.

In regards to the recommendation, there's a very good document you should read at forum.appian.com/.../High_Availability_and_Disaster_Recovery_Configurations.html
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel
0 Mangesh Vidhale
A Score Level 2
over 8 years ago

Thanks for the reply.
Would you also clarify on below?
What will happen to timer based processes scheduled on machine A when the machine A goes down. How these processes are handled in machine B.?
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel
0 Eduardo Fuentes
Appian Employee
over 8 years ago

AS I said before data is in sync all the time. There's no concept of a timer being triggered on a single machine. There's a concept of transaction, the transaction to start the timer is a shared transaction which means that it'll be triggered as long as at least one engine server is up
Cancel
Vote Up 0 Vote Down

Sign in to reply

Verify Answer

Cancel