RE: Are journal's UB & UP entries guaranteed to be in 1-2 sequenc e?

["Walden H. Leverich III" <WaldenL@xxxxxxxxxxxxxxx>]

>journal entries are written before the write/update to the file 
>- this assures that things can be rebuilt from journal in the 
>event of failure. So this would support Al's information, I 
>think.

Nope, I have to disagree that this supports Al's information. Think of it
this way, I have to deposit money into a bank before I withdraw it[1], and
so to you. That is:

Walden - Deposit
Walden - Withdraw
Vern - Deposit
Vern - Withdraw

It can never be:
Walden - Withdraw
Walden - Deposit


However, it can be

Walden - Deposit
Vern - Deposit
Vern - Withdraw
Walden - Withdraw

And I believe this is the exact scenerio that the original poster was
worried about.

-Walden

[1] - I'm ignoring overdraft protection, monies already in the account,
margin accounts, etc. You get the point.

------------
Walden H Leverich III
President
Tech Software
(516) 627-3800 x11
(208) 692-3308 eFax
WaldenL@xxxxxxxxxxxxxxx
http://www.TechSoftInc.com 

Quiquid latine dictum sit altum viditur.
(Whatever is said in Latin seems profound.)
 

-----Original Message-----
From: Vern Hamberg [mailto:vhamberg@xxxxxxxxxxxxxxxxxxxxxxxxx] 
Sent: Friday, September 05, 2003 11:28 AM
To: Midrange Systems Technical Discussion
Subject: Re: Are journal's UB & UP entries guaranteed to be in 1-2 sequence?


We were discussing journals yesterday - journal entries are written before 
the write/update to the file - this assures that things can be rebuilt from 
journal in the event of failure. So this would support Al's information, I 
think.

Vern

At 10:35 AM 9/5/2003 -0400, you wrote:
>I asked, and was given the assurance that it was so.
>
>Al
>
>Even though you are Al <g>, is that documented anywhere?
>
>GA


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