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  3. August 2023

Re: External Re: Journal Receiver Creation Based On Time

Before you get too far into this consider the recovery aspects of what you’re trying to do. Clearly the recovery point objective is one hour or less. The real question is in the event you need to restore some/all tables, how are you going to get all the roll forward to work? Roll back might be more interesting if the error is not found prior to the change in the receiver.

Consider using one journal per application, per day. You might have multiple journals that way. Less if the referential integrity between applications is a requirement.

With one journal / day, you can change the journal receiver during the back up (BRMS can do this almost automatically) and then the detached journal will be in the nightly back up. You can save the active journal receiver anytime you want but now you only need the one, so the dedupe/sendremote is smaller Than it would ordinarily be.

What kind of VTL?

--
Jim Oberholtzer
Agile Technology Architects




On Aug 25, 2023, at 3:03 PM, (WalzCraft) Jerry Forss <JForss@xxxxxxxxxxxxx> wrote:

Jim

I was thinking of that as well but thinking that the save to the VTL and replication to the cloud would send everything every time.
The de-dup process would see the receiver as being changed.

Once running I will have to see the bandwidth impact on the different methods.
The network side will be sending to the cloud as well.

-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Jim Oberholtzer
Sent: Friday, August 25, 2023 10:20 AM
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: External Re: Journal Receiver Creation Based On Time

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Creating a new journal every hour is going to make a rollback or recovery a far more interesting (read: difficult) feat.

You can back up active journals, why not just run your backup on an hourly basis? You'll be stacking back up on top of back ups, but hey it's only disk space.

Once the backup is complete, consider getting rid of the previous 24 hours of backups to save space on the VTL.

--
Jim Oberholtzer
Chief Technical Architect
Agile Technology Architects


On Fri, Aug 25, 2023 at 8:29 AM Marc Rauzier <marc.rauzier@xxxxxxxxx> wrote:

Le 25/08/2023 à 14:58, (WalzCraft) Jerry Forss a écrit :
Hi All

New to journaling so have some basic questions.

We are getting a VTL and want to save journals every hour, which
will be
replicated to the cloud.

Basically what I want to do is every hour create new receiver and
save
detached receiver to VTL.
I see where I need to have *USER on the Manage receivers but not
seeing
where I specify the length of time.

Do I just create a new receiver every hour and that automatically
detaches the previous one?

Yes, this is the way it works. You can generate a new receiver when
you want. You just have to handle yourself the delete after your backup.

Example:

CHGJRN JRN(DIMARCO2/JRN) JRNRCV(*GEN)
Journal receiver JRN0000132 created in library DIMARCO2.
Journal receivers JRN0000131 and *N detached.
Sequence number not reset. First sequence number is 416.

CPF7020 information message contains the name of the detached receiver.
Therefore you can run something like RCVMSG MSGTYPE(*INFO) RMV(*NO)
MSGDTA(&MSGDTA), then substring &MSGDTA to find the receiver name
based on CPF7020 message description.



What is the best practice for accomplishing this?



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Subject to Change Notice:

WalzCraft reserves the right to improve designs, and to change specifications without notice.

Confidentiality Notice:

This message and any attachments may contain confidential and privileged information that is protected by law. The information contained herein is transmitted for the sole use of the intended recipient(s) and should "only" pertain to "WalzCraft" company matters. If you are not the intended recipient or designated agent of the recipient of such information, you are hereby notified that any use, dissemination, copying or retention of this email or the information contained herein is strictly prohibited and may subject you to penalties under federal and/or state law. If you received this email in error, please notify the sender immediately and permanently delete this email. Thank You

WalzCraft PO Box 1748 La Crosse, WI, 54602-1748
www.walzcraft.com<http://www.walzcraft.com> Phone: 1-800-237-1326
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