20 Feb
2012
20 Feb
'12
12:52 p.m.
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