RE: Save While Active

[Pete Hall <pbhall@xxxxxxxxxxxxx>]

At 11:18 06/19/2002, you wrote:

> >>>quiecesing - thats a word that rings a bell - but what is it really ?
>
>Prior to starting my unattended backup process I end the following
>subsystems:
>
>QINTER, QSPL, QHTTPSVR, QSNADS, QSVCDRCTR, QSERVER and QUSRWRK.


That's about what I used to do too. It works great for the daily save of
user libraries. If you specify a message queue, the system will send a
message when it has arrived at its save checkpoint (meaning that all
libraries are in a synchronized state), at which time it's safe to start
everything back up again. A separate job can be submitted from the backup
job, which waits for the message while the backup continues. If you have a
quick tape drive (like maybe a 3570??) You can specify *DEV for compression
and USEOPTBLK(*NO), which relieves the CPU from the necessity of doing
program compression. I don't think you gain that much by saving to save
files if you can take advantage of device compression. Anecdotally, there's
not much additional CPU utilization required to serialize the data.


Pete Hall
pbhall@ameritech.net
http://www.ameritech.net/users/pbhall/index.html