central instance help.

[former_member829550]

hi,

can anybody differentiate between the central instance and a application server.

from my perspective , CI is the one which has dispatcher,wp's,etc.,

then what excatly is the application server holds.

do App.Ser = CInstance. or is there any difference between them.

help needed, as i am totally confused with these terms.

related links will be truly appreciated.

regards,

bhupesh

[Former Member · Accepted solution]

In a traditional central instance (e.g. R/3 4.7), it is basically.

1. A message server (you can see this as a running process).

2. A abnormal instance: One of the work processes is the enqueue.

This is how you can tell that it's different.

For the newer ABAP instances (NW, NW 7, 7.1, etc.), you can find what they called high-availability enqueue replication. To do this, what happened is that the enqueue is removed from the abnormal instance. So ... you'll see:

1. A message server process

2. An enqueue process

3. A normal instance.

[JPReyes · Accepted solution]

In a traditional central instance (e.g. R/3 4.7), it is basically.

1. A message server (you can see this as a running process).

2. A abnormal instance: One of the work processes is the enqueue.

this doesn't make sense.... are you saying that the enque is an abnormal process??? based on what?

Juan

[Former Member · Accepted solution]

CI instance:

DIA, BTC, SPOOL, UPDATES, and ENQ

App instance:

DIA, BTC, SPOOL, UPDATES

I'm saying the instance is abnormal. I am not saying the ENQ process is abnormal.

[JPReyes · Accepted solution]

What's abnormal in a Central instance? abnormal will be that the enque wasn't there

[Former Member · Accepted solution]

lol, I completel agree! I'm just saying that the ENQ process is what makes CI different from the App instances. I guess I could've worded it better.

Hey, I love my CI, I depend on it for my paycheck. I am sorry that I called it abnormal! haha

[JPReyes · Accepted solution]

yeahh.... She might get offended and plan a complot with the database against you!!

hehehe

Regards

Juan

[former_member829550]

thz

[JPReyes]

Central instance is the one that hold the enque process which is the process responsable to handle the database locks.

This question has been answered numerous times... next time please search before posting

Regards

Juan