Experimental Physics and
Industrial Control System

Emmanuel Mayssat <[email protected]> · Wed, 16 Apr 2008 17:11:10 -0700

Mark,

I implemented autosave relatively easily thanks to the documentation.
For the set_passX_restoreFile functions, it says that only 8 files can
be restored at each pass.

This is rather an important limitation if I have a restore file per
device (and not 1 per ioc). Is this limitation still applicable?

Is doing a restore at pass0 equivalent to setting the VAL fields in the
db file? For pass1, is it equivalent to having several caputs on a
running ioc?

Why do they recommend saving vxWorks station over NFS? I assume it is
only because of a storage space limitation. If that is the case, then it
is not applicable for computer-based IOC. Isn't it?

Regards,

--
E

On Tue, 2008-04-15 at 21:22 -0500, Mark Rivers wrote:
> The problems are probably less frequent than that.  And a beamline might be 4 IOCs.  
>  
> The issues tend to arise during power or network failures when the vxWorks VME IOC is in the middle of saving the file via NFS.
>  
> There are safeguards now in place that make this much less likely.  And there are backup files created by the autosave system that can be recovered from.
>  
> Mark
>  
> 
> ________________________________
> 
> From: [email protected] on behalf of Emmanuel Mayssat
> Sent: Tue 4/15/2008 8:35 PM
> To: epics
> Subject: autosave issues
> 
> 
> 
> Hello again,
> 
> I was looking at autosave record/functions.
> I read that APS is experiencing at least 1 autosave issue per beamline,
> per year. Can anyone expend on that?
> 
> I assume that files are being corrupted or such...
> How could that happen?
> 
> --
> Emmanuel
> 
> 
> 
> 
> 

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System