lpz%ocu.DECnet@STC10.CTD.ORNL.GOV ("OCU::LPZ") (05/24/88)
Hi:
I moved the Swapfiles, Pagefiles, Accountng.Dat, Sysuaf.Dat,
Netuaf.Dat, and Rightslist.Dat files off of the system disk
a long time ago. I have a semi-large cluster (2 8650s and
2 8700s) and the system disk was a performance bottleneck.
To move the accounting files, you have to define an executive-mode
system logical name ACCOUNTNG to point to the new file. There
are two things that may get you:
1. The accounting utility isn't smart enough to look there,
so you have to explicitly tell it to do that by adding
the logical name to the end of the command string, like:
$ Accounting/Since=Today/Full/User=Fred Accountng
2. When accounting starts up, you haven't defined this logical
name yet. You have to put the following lines in your
SYSTARTUP.COM file after you define the new logical name.
$ Set Accounting/Disable !Allow Job_Controller to read Accountng lognam
$ Set Accounting/Enable=(Batch,Interactive,Login_Failure,Print,Process,Network,-
Message,Detached,Subprocess) !This one enables accounting, and
$ Set Accounting/Enable ! this one starts accounting (Feature?)
The Disable command is necessary because the Job Controller only
looks at the logical name when it starts accounting. The long list
of Enables is because Set Accounting/Enable doesn't do anything.
It used to pick up the whole list by default, but that broke
around VMS 4.5 or 4.6. It is possible (likely?) that the second
Set Accounting/Enable command is no longer necessary, but when
I did this (September 1987), accounting wouldn't start after
the first one.
If you are doing this because of performance, rather than because
the disk is full, you will find that adding the Shadowing product
and shadowing the system disk will gain you about 30% extra
capacity. The system disk pair tends to run at about 35 IO/Sec
during high loads. Before I added shadowing, the cluster was
bog-slow at that point. Now it works just fine there.
Lawrence
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P O Box Y
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