Leonard wrote:
 
>>Subject:      Dataset I/O Measurement
>To: Multiple recipients of list HP3000-L <[log in to unmask]>
>
>We are interested in measuring both physical and logical I/O on specific
>files.  FILERPT v. 2.94 (Allegro) seems to operate on all files and then
>highlight the big-time spenders.  It also requires that we trap FCLOSE
>records in our log files.  We do not do this as we found that we quickly
>ran out of disc space on log files!
>
>Is there any method to get the data we want?  Tools we have and may not
>be using to the fullest are Glance and SOS3000.
>
>Thanks,
>
>Leonard Berkowitz,
>RIA Group (Warren, Gorham & Lamont)
>617-292-8349 (E. D. T.)
>
>
Well, Leonard, there really isn't a satisfactory answer, if you are a
TurboImage shop.  TI uses mapped file I/O to perform a large percentage of
its activity.  Mapped file access isn't logged in the system log files so
this makes any utility which relies on FCLOSE records less than adequate for
reporting I/O.
 
The only alternative is to get a tool which traps I/O at a much lower level
but I don't think one exists for this purpose.
 
Glance, by itself, offers little help since it doesn't log performance
information.
 
SOS does a much better job (surprise!) but you won't get I/O information by
file.  You can get it globally, by LDEV or by application.
 
Bill
---
Bill Lancaster         Lancaster Consulting
(541)926-1542 (phone)  (541)917-0807 (fax)
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