/Logger ODB tree

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Links

• keys in /Logger tree
• keys in /Logger/Channels subtree
• keys in /Logger/Runlog subtree
• keys in /Logger/History subtree
• /History tree
• MIDAS logger utility (mlogger)

Creating the /logger tree

The /Logger ODB tree is created when the mlogger utility is started for the first time. The keys will be filled with default values which users may change as required to customize their experiments. See keys in the ODB /Logger tree for more information on each key.

Purpose

Most of the keys in the /Logger ODB tree are used to customize logging of the data. There are also keys to customize the Messaging system. The /Logger tree also may contain optional keys /Logger/Elog dir and /Logger/History dir relevent to storing the History and Elog data files.

The optional subtrees /Logger/Runlog/SQL is used when logging to a mySQL database and /Logger/Runlog/ASCIIfor writing to an ASCII file.

Example

The following example shows a typical /Logger ODB tree obtained using the odbedit ls command. See keys in the ODB /Logger tree for more information on each key.

Logger

   Data dir                    /home/expt/online/data
   Write data                  n
   ODB Dump                    n
   ODB Dump File               run%05d.json
   ODB Last Dump File          last.json
   Auto restart                n
   Auto restart delay          0
   Tape message                y
   Channels                    
       0                       
           Settings            
               Active          y
               Type            Disk
               Filename        run%05d.mid
               Format          MIDAS
               Compression     0
               ODB dump        y
               ODB dump format json
               Log messages    0
               Buffer          SYSTEM
               Event ID        -1
               Trigger mask    -1
               Event limit     0
               Byte limit      0
               Subrun Byte limi0
               Tape capacity   0
               Subdir format   
               Current filenamerun01434.mid.lz4
               Data checksum   CRC32C (one of: NONE CRC32C SHA256 SHA512 ZLIB)
               File checksum   CRC32C (one of: NONE CRC32C SHA256 SHA512 ZLIB)
               Compress        lz4 (one of: none gzip lz4 bzip2 pbzip2)
               Output          FILE (one of: NULL FILE FTP ROOT PIPE)
               Gzip compression0
               Bzip2 compressio0
               Pbzip2 num cpu  0
               Pbzip2 compressi0
               Pbzip2 options  
           Statistics          
               Events written  0
               Bytes written   0
               Bytes written un0
               Bytes written to14419470360
               Bytes written su0
               Files written   31
               Disk level      0.8555651332246208
   Runlog                      
       SQL                     
           Create database     n
           Write data          n
           Hostname            localhost
           Username            root
           Password            
           Database            vslice
           Table               Runlog
           Logfile             sql.log
           Links BOR           
               Run number -> /Runinfo/Run number
                               1521
               Start time -> /Runinfo/Start time
                               Thu Nov 17 03:13:10 2022
           Links EOR           
               Stop time -> /Runinfo/Stop time
                               Thu Nov 17 03:00:39 2022
       ASCII                   
           Write data          y
           filename            runlog.log
           Links BOR           
               Start time -> /Runinfo/Start time
                               Thu Nov 17 03:13:10 2022
               Run number -> /Runinfo/Run number
                               1521
           Links EOR           
               Stop time -> /Runinfo/Stop time
                               Thu Nov 17 03:00:39 2022
               Comment -> /Experiment/Edit on start/Comment
                               FEP Hit Finder 
   History                     
       MIDAS                   
           Type                MIDAS
           Active              y
           Debug               0
           PerVariableHistory  0
           History dir         
       ODBC                    
           Type                ODBC
           Active              n
           Debug               0
           Writer_ODBC_DSN     history_writer
           Reader_ODBC_DSN     history_reader
       SQLITE                  
           Type                SQLITE
           Active              n
           Debug               0
           Sqlite dir          
           History dir         
       MYSQL                   
           Type                MYSQL
           Active              n
           Debug               0
           MYSQL Writer        mysql_writer.txt
           MYSQL Reader        mysql_reader.txt
       FILE                    
           Type                FILE
           Active              n
           Debug               0
           History dir         
   Run duration                0
   Next subrun                 n
   Subrun duration             0
   Message file date format    json
   Message dir                 
   History dir

Keys in the /Logger tree

Click on the following links for a description of the

• keys in the /Logger tree
• keys in /Logger/Channels subtree
• keys in /Logger/Runlog subtree
• keys in /Logger/History subtree