RE: Impact of journalling on HA systems

David,

When you enable journaling on a file, you create the journal receiver object (crtjrnrcv lib/objname)and journal object, (crtjrn lib/jrnname jrnrcv(lib/objname). The receiver object is what holds entries for the files being journaled.

The next step to add a remote journal.. ADDRMTJRN is the command. You will need the relational database name of the remote system and the local journal to mirror over.

Then you can use the command wrkjrna lib/jrnname and press F16 to get the remote receiver. At first it will be Inactive and option 13 will activate it.

Once you activate the remote journal, you can logon to the remote system and see the journal and receiver there. They are still on the local system as well.

Back to your question, the local journal receiver is mirrored to the remote receiver and left on the local system. So you basically have two copies of your receivers. And yes you can only have one Journal attached to an object at a time.

Chris Bipes
Director of Information Services
CrossCheck, Inc.


-----Original Message-----
From: MIDRANGE-L [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of David Gibbs
Sent: Wednesday, February 11, 2015 10:55 AM
To: midrange-l@xxxxxxxxxxxx
Subject: Impact of journalling on HA systems

Folks:

I admit I have an imperfect understanding of both journalling and high availability systems.

It was my understanding that HA systems were implemented by creating journals on the host systems database and sending the journal entries to a remote system.

Unless I missed something ... you can only have a single journal on a physical file.

So my question is this: Is it possible to have a file journalled, for local use, AND replicated with a HA system?