Howto take a CONSISTENT backup of AS-Java WITHOUT shutting down?

According to the official documentation one needs to shutdown the Java instance (EP, KM, BI-Java) and backup filesystem and database at the same time to ensure consistency, so far I understood.
Since there is no easy way of finding out, who's logged in at a specific moment, we have no chance to inform logged in/working users about an imminent downtime/shutdown.
Things become even worse, if backups are taken at night when different timezones are using the system productively.
What is a recommended "best practice" for those kind of setups? Is there anywhere an information on which of the running applications writes data into the filesystem so we could probably keep it in sync with the database "manually" in case we need to recover a backup, that was taken online?
Any input greatly appreciated.
Markus

Hi Markus,
my strategy is to take an online (cons) backup every night and an offline backup every sunday at 00:00.
There is a way to take an online cons backup, and now is supported in 2004s (maybe too in NW04 but NOT in was 6.20).
Here are my scripts for online/offline backup.
Online :
xcopy E:\usr\sap E:\BO\j2e /Q /E /C /H /R /O /Y
xcopy E:\FSDB E:\BO\fsdb\ /Q /E /C /H /R /O /Y
brbackup -p initp1pOnline.sap -d disk -t online_cons -m all -c -u system/password -k no -e 0 -l E -a -p initp1pOnline.sap -save_delete -d disk -n 10000 -c -u system/password -k no -l E
Offline :
stopsap name=p1p nr=00 sapdiahost=sapep1p
stopsap name=p1p nr=01 sapdiahost=sapep1p
net stop SAPP1P_00
net stop SAPP1P_01
xcopy E:\usr\sap E:\bof\j2e /Q /E /C /H /R /O /Y
xcopy E:\FSDB E:\bof\fsdb /Q /E /C /H /R /O /Y
brbackup -c -u system/password
net start SAPP1P_01
net start SAPP1P_00
startsap name=p1p nr=01 sapdiahost=sapep1p
startsap name=p1p nr=00 sapdiahost=sapep1p
I tested both backups and was able to restore from scratch without problem.
Brad

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>>As far as I know, in order to take a full backup of a database, one need to shutdown a database.
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Oracle Backup and Recovery
http://www.oracle.com/technology/deploy/availability/htdocs/BR_Overview.htm
Oracle Backup and Recovery FAQ
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LSNRCTL for 32-bit Windows: Version 10.2.0.1.0 - Production on 20-JUL-2009 13:07:13
Copyright (c) 1991, 2005, Oracle. All rights reserved.
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Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=abc)(PORT=1522)))
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Recovery Manager: Release 10.2.0.1.0 - Production on Mon Jul 20 13:10:19 2009
Copyright (c) 1982, 2005, Oracle. All rights reserved.
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Howto take a CONSISTENT backup of AS-Java WITHOUT shutting down?

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