Re: Access Security Config File (ACF) size?

[Anders Lindh Olsson via Tech-talk <tech-talk at aps.anl.gov>]

Hi Dave,

We use a singular ACF file at ESS, and we currently have around ~10 M records in production. It has not really been a problem thus far, but we also do not (yet?) have many conditionals in the file.

When we decided on the approach, we weighed between per-IOC and global and centralised. One of the main concerns for per-IOC was traceability - doing pvget MY-PV.ASG will not be very helpful.

Cheers

A

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From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of David Bracey via Tech-talk <tech-talk at aps.anl.gov>
Sent: 22 April 2026 16:19
To: tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
Subject: Access Security Config File (ACF) size?

 

Does anyone have a feel for how large an ACF could be without becoming problematic?

 

Considering an extreme example, if one had ~100000 PVs, and one defined an ASG for each PV, would that be a problem?

 

How big do ACF’s get in the wild?

 

Are there strategies for using multiple ACF’s?

 

• Dave Bracey, Fermilab