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<== Date ==> <== Thread ==>

Subject: RE: querying for sets of pvs in archived data
From: pthomas@caltech.edu
To: "Emmanuel Mayssat" <emayssat@outlook.com>
Cc: "tech-talk@aps.anl.gov" <tech-talk@aps.anl.gov>
Date: Fri, 28 Jun 2013 10:25:58 -0700 (PDT)
Hi Emmanuel,

Thank you for your reply. I think there may be a difference though. I
believe that the SCR applications use snapshots taken at periodic
intervals in time? What I had in mind was something that places monitors
on the process variables and archives the values only when they change.
The queries I described would then be done on that recorded data.

MASAR does look like a nice program though.

Thank you,
Patrick

>
>> store and query data as I have described, but I am wondering if I am
>> reinventing the wheel. Does a tool such as this already exist?
>
> Yes.
> You are describing a feature of Save/Compare/Restore applications.
> SCR are also know as epics-backup application (i.e take a snapshot of a
> running machine, compare 2 snapshots, compare a snapshot with the running
> machine)
>
> You next question is where to get such a piece of software. Well...
> I am using SDDS save/compare/restore (very old)
> SCORE may have the described feature as well (used at SNS and SLAC)
>
> <Shameless plug for MASAR>
> I am currently looking at MASAR part of epics-4, which is straight forward
> to install, but still in development.
> For example, comparisons of 2 snapshots using the pyQt GUI is missing.
> A CSS GUI is also a work-in-progress.
> At this time, most of the development is at the GUI level
> So if you don't mind a text output (i.e. in a terminal), you can use MASAR
> with its python API and have something working by tonight.
> </Shameless plug for MASAR>
>
>
>
>



Replies:
Re: querying for sets of pvs in archived data Robert Soliday
References:
querying for sets of pvs in archived data pthomas
RE: querying for sets of pvs in archived data Emmanuel Mayssat

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