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{{mhttpdpages1|[[Message System]]}} ...sages generated by applications connected to the experiment. See [[Message System]] for details.

# Log experimental data to storage device'''[[Event_Filtering|(s)]]''' # Handles the overall Midas '''[[Message_System|System messages]]''' logging

<div id="midas.log"></div> == MIDAS Log file ==

; [[Message System #MIDAS Log file |log file]] ;[[Message System]]

* '''[[Alarm System]]''' &rarr; ''User and system Alarm'' * '''[[History System]]''' &rarr; ''Chart history of any of the acquisiti

By default, {{Utility|name=msysmon}} will log the CPU data etc to the main SYSTEM buffer every 10s. In most experimental setups, this means that the data wil ...monitor and log GPU usage, and temperatures as well as CPU, memory etc. A system only needs to run msysmon or msysmon-nvidia.

Log directory is [[Keys in the ODB /Logger tree #/Logger/Data dir | <def Data directory is same as Log unless specified in channels/

...so the path of the midas message log file [[Message System#midas.log|midas.log]] and paths of the MIDAS stylesheet and Javascript library that are useful

Message file midas.log Log messages 0

* [[Alarm System]] ...s tree contains user and system information related to alarms (see [[Alarm System]]). The information from this tree is displayed in the [[Alarms Page]].

* the message log file (unless overruled by [[#/Logger/Message File | Message File]]), ** [[History System|MIDAS history files]] (unless overruled by [[#/Logger/History dir | History

The following information has been incorporated in [[Alarm System]] = Notes on the implementation of the MIDAS alarm system. =

Three Run States define the states of the MIDAS DAQ system: ...tion for a run transition. This notification is done by registering to the system for a given transition ( [[cm_register_transition()]] ) by specifying the t

* [[History System]] The ODB /History tree contains information related to the [[History System]].

The ODB /Equipment tree contains user and system information related to a frontend. Buffer STRING 1 32 9h 0 RWD SYSTEM

...hat Page]]). The chat messages are not saved in the [[Message System#MIDAS Log file|MIDAS logfile]].

...or each transaction to a log file {{Filepath|path=/tmp/mserver.log}}. The log entry contains the time stamp and RPC call request. ...py of <span style="color:darkcyan;">''mserver''</span> can be started on a system, provided they use different tcp ports. This is useful if, for example, [[e

=== <span style="color: purple;">''Log messages''</span> === ...y in the [[#Settings subtree|Settings subtree]] is a bit-field for logging system messages as message events along with the event data from the experiment.

* [[History System]] It is possible to use the midas history system to periodically record images from a network-connected webcam, for later pl

"SYSTEM", // event buffer 0, // log history

| data-x-log || scatter, histogram || Use logarithmic X-axis if "true" | data-y-log || scatter, histogram || Use logarithmic Y-axis if "true"

...e data. There are also keys to customize the [[Message System |Messaging]] system. relevent to storing the [[History System | History]] and [[Elog]] data files.

...]], and as a message on any windows running [[odbedit]] clients. The alarm system is flexible and can be extensively customized for each experiment ...p and activation is done through the '''[[/Alarms ODB tree]]'''. The alarm system includes several other features such as sequencing and control of the exper

...age. While there are many ways to do this independently of the acquisition system, the lazylogger provides a simple way to manage this task. Lazylogger featu ...tory, and contain the operational parameters of the channel(s). Two hidden log files for each channel are created and updated ans resides in the main expe

...idas system diagram]] to see how these elements interact to form the MIDAS system. *Message System - ''Dedicated buffer system to handle Midas internal messages'' -

...Structure|the ODB Structure]] and a list of all the ODB trees used by the system can be found in [[Online Database]]. The ODB is hierarchically structured, similar to a file system, with directories and sub-directories (or trees and subtrees). The data are

= MIDAS Slow Control System= ...the ODB. If several types of hardware are to be included in a Slow Control System, they may be assigned to a separate Slow Control Equipments. Each Slow Cont

The history system is an add-on capability built into the MIDAS data logger [[mlogger]] to rec Since June 2020, it is possible to also use the midas history system to record images (png/jpeg etc) periodically, for example to later produce

...l bomb and there will be a message in the [[Message System#midas.log|Midas log file]] rejecting the connection from unallowed host 'ladd21.triumf.ca'. ...ts</span>, you should see messages in the [[Message System#midas.log|Midas log file]] about reloading the access control list

"SYSTEM", // event buffer 0, // don't log history

Midas uses a Remote Procedure Call (RPC) system to allow different midas clients to talk to each other directly. One client Internally, midas uses the RPC system to handle run transitions, ODB hotlinks and more.

-E only display ELog system ...the [[Message Page]], which shows messages generated by the MIDAS [Message System]] as well as the user using cm_msg() functions.

...re are several ways of doing this. The ASCII string may be supplied to the system as the [[Equipment List Parameters#Bank Definition/Init String|init string] 0, /* log history */

Attributes = Run number, Author, Type, System, Subject Options System = General, DAQ, Detector, Electronics, Target, Beamline

* Destination buffer name (SYSTEM if destination event goes to logger). Log history INT 1 4 18h 0 RWD 0

* [[Slow Control System]] ...h frontend. We will first document every feature supported by the frontend system, then explain a slightly more user-friendly wrapper (mfed.cxx) that helps r

...in midas banks that can eventually get logged to file or the midas history system. If you don't need to produce data, you can write midas clients without usi ...TMFE::Msg()</code> (a wrapper around <code>cm_msg()</code>) if you want to log an error.

by the system. * A message event (ID 0x8002) is created if Log messages is enabled in the logger channel setting. The message is contained

The message log (see [[Message System]]) can be accessed from a custom page using a call to the JavaScript librar = Generate a message log entry =

| [[File:Capture_sgas.png|thumb|left|Figure 1: MEG Gas System]] || '''Example 1''' This page (Figure 1) from the MEG experiment at PSI shows a complex gas system. This shows the use of "fills" and "labels". Open valves are represented as

Log on to the ''[[#Introduction|Experiment Host]]'' and decide on a name for th ...ath=$HOME/online}} will contain the MIDAS messages file ({{File|name=midas.log}}) and