Hi Klaus,
On 02/20/2012 10:54 AM, Klaus Darilion wrote:
Hi Anca!
I wonder what happens if I build a server cluster (p1 and p2) with subs_db_mode=3 and publ_cache=0.
Then a subscription to user1 is received from p1 and stored into the DB. Then user1 sends a publish via p2, which is stored in the DB.
Who will send the NOTIFY for the subscription? p1 or p2? I guess p2 as p1 has no idea about the publish - correct?
The machine that received the Publish, in this case p2 will send the Notify. Looking now in the code, I saw that when sending out this Notify, p2 will actually put in the Contact header the contact of the p1 (initial contact). I don't think there should be any problem with this ( except someone compares Via and Contact, but probably not). In this way always the reSubscribes will get to the same machine. I see now an opportunity to improve the performance because of this behavior - having a mode in which to read from memory for Subscribes, but always read from DB for Publishes.
Regards, Anca
thanks Klaus