Re: How to know which CA client(IP address) modified a PV

[LiangChih Chiang via Tech-talk <tech-talk at aps.anl.gov>]

Hello Guobao,

>When using caPutLog, to avoid the info be flushed in your IOC terminal output due to its max line limit,

I am not aware this behavior exists.

My IOC/caPutLog(version 3.5) doesn't output to terminal.

Doesn't it just send log messages to a log server via TCP?

>you might want to redirect the output which you are interested into an external server, and you can always look back later.

I use iocLogServer(in EPICS base libCom) to save the log messages into files.

>At APS, we are using logstash to save the info we are interested in.

Thanks for the info.

On Mon, May 12, 2025 at 9:54 PM Shen, Guobao <gshen at anl.gov> wrote:

When using caPutLog, to avoid the info be flushed in your IOC terminal output due to its max line limit, you might want to redirect the output which you are interested into an external server, and you can always look back later.

At APS, we are using logstash to save the info we are interested in.

 

Thanks,

Guobao

 

From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of LiangChih Chiang via Tech-talk <tech-talk at aps.anl.gov>
Date: Sunday, May 11, 2025 at 9:30 PM
To: Mercado, Ronaldo (DLSLtd,RAL,LSCI) <ronaldo.mercado at diamond.ac.uk>
Cc: tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
Subject: Re: How to know which CA client(IP address) modified a PV

I tried caPutLog and succeeded.

Need more time to configure the access security file to restrict what to log.

 

 

I can't find the document of the pvlogging module.

Is there any?

 

 

On Fri, May 9, 2025 at 6:16 PM Mercado, Ronaldo (DLSLtd,RAL,LSCI) <ronaldo.mercado at diamond.ac.uk> wrote:

Hi,

 

I have used pvlogging for this purpose.

 

https://github.com/DiamondLightSource/pvlogging

 

Regards,

Ronaldo

 

From: Tech-talk <tech-talk-bounces at aps.anl.gov> On Behalf Of LiangChih Chiang via Tech-talk
Sent: 09 May 2025 04:15
To: J. Lewis Muir <jlmuir at imca-cat.org>
Cc: tech-talk at aps.anl.gov
Subject: Re: How to know which CA client(IP address) modified a PV

 

Thanks.

 

caPutLog seems to be a satisfying solution. I will give it a try.

 

The log messages include host information as the following excerpt from the documentation:

 

    The actual log message sent from the IOC has this format:  

    <iocLogPrefix><date> <time> <host> <user> <pv> <change>

 

 

 

 

 

On Fri, May 9, 2025 at 10:58 AM J. Lewis Muir <jlmuir at imca-cat.org> wrote:

On 05/09, LiangChih Chiang via Tech-talk wrote:
> How to know which CA client(IP address) modified a PV in EPICS version 3.14.
>
> I searched and got two methods:
>
> What other methods do you use or recommend?

Haven't used it myself, but there's caPutLog:

  https://github.com/epics-modules/caPutLog

Lewis

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