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

Subject: RE: 'open' epics backup?
From: "Chu, Paul" <[email protected]>
To: "Pelaia II, Tom" <[email protected]>, "<[email protected]>" <[email protected]>
Cc: "[email protected]" <[email protected]>
Date: Thu, 25 Aug 2011 19:15:25 -0700
At LCLS, XAL SCORE has been extended for the following features:

1. PVs in SCORE lists are checked against IRMIS signal table nightly.
2. Magnet field settings can be restored according to energy scaling, i.e. even machine was running at a different energy than the snapshot taken, the same physics lattice can be restored.
3. The GUI was slightly modified to better suit SLAC operation needs.

Paul
________________________________________
From: [email protected] [[email protected]] On Behalf Of Pelaia II, Tom [[email protected]]
Sent: Thursday, August 25, 2011 1:10 PM
To: <[email protected]>
Cc: [email protected]
Subject: Re: 'open' epics backup?

At SNS we use the SCORE application which is part of XAL to save and restore PV values. Users can save and restore snapshots (stored in a database) and compare them with the live values. Saving and Restoring is currently on demand.

- Tom


On Aug 25, 2011, at 1:25 PM, <[email protected]> wrote:

> On 12:41 Wed 24 Aug     , Pete Jemian wrote:
>> Not sure what type of backup you are considering.
>> Here's a couple tools or methods:
>>
>> * persistence of PVs across IOC reboots: autosave, from synApps
>> * snapshots of a set of PVs at regular times: SDDS files
>> * time-series display of PVs: various including SDDS or rrdtool
>
> I am currently using SDDS and moving away from it.
> (no python support, no used outside of epics community)
> I looked at RRDtool.
> Although that is not a backup utility, that's definitly something I want to use to move away from
> timeseries using SDDS. (which I also use)
> Just a question: how do you take a time serie of thousands of PV with rrdtool at one time T?
> I assume you had to develop a ca plugin/utility, didn't you?
>
> When I talked about backup, I am refering to snapshot, which can be restored.
> sddscasr can do that. Anything else?
>
>
> As far as IRMIS is concerned, well although I don't know much about it, just hearing IRMIS sounds
> complicated. Reading the IRMIS primer is confusing. I just want to take a snapshot and IRMIS, it seems
> to me, can do everything ;-)
>
>
> --
> Emmanuel






References:
'open' epics backup? emmanuel_mayssat
Re: 'open' epics backup? Pete Jemian
Re: 'open' epics backup? emmanuel_mayssat
Re: 'open' epics backup? Pelaia II, Tom

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