Provided by: diet-agent_2.8.0-1build2_amd64 bug

NAME

       maDagAgent - DIET grid middleware agent

NAME

       maDagAgent - Main binary of the DIET Architecture for managing workflows

SYNOPSYS

          maDagAgent config_file [sched] [pfm] [IRD] ...

DESCRIPTION

       The maDagAgent is the daemon responsible for the management of workflows execution.

DIET PLATFORM

       A  DIET  platform  is buildt upon Server Daemons (SeD). Requests are distributed amongst a
       hierarchy of agents.  The  scheduler  can  rely  on  resources  availability  informations
       collected  from  three  different tools: NWS sensors which are placed on every node of the
       hierarchy, from the application-centric performance prediction tool FAST which  relies  on
       NWS  informations  or  from  CoRI  Easy  a  module  based on simple system calls and basic
       performance tests.

       The different components of a DIET architecture are the following:

       Client A client is an  application  which  uses  DIET  to  solve  computational  problems.
              Clients could be web pages, PSE scripts like Matlab or Scilab or native program.

       Master Agent (MA)
              A  MA  manages  computation  requests  from  clients.  It  chooses  the best server
              available to handle the request based on performance  informations  collected  from
              servers. Then, the reference of the chosen server is returned to the client.

       Local Agent (LA)
              A  LA  transmits  requests  between  MAs  and servers. LAs store a list of services
              available in their subtree. For each service, LAs store a list of children  (either
              agents  or  servers)  providing  the  former.  Depending  on the underlying network
              topology, a hierarchy of LAs may exists between the MA and the appropriate servers,
              one of LAs tasks is to do a partial scheduling on its subtree, effectively reducing
              its MA workload.

       Server Daemon (SeD)
              A SeD encapsulate a computational resource. FOr instance, it can be locate  on  the
              entry  point  of  a  parallel computer. SeD store a list of locally available data,
              available computational  solvers  and  performance-related  information  (available
              memory  amount  or  number  or  resources). During registration, SeD declare to its
              parent agent (LA or MA) every computational problem it can  solve.   SeD  can  send
              performance  and  hardware  informations  by  using  the CoRI module or performance
              predictions for some kinds of problems by using the FAST module.

       Master Agent DAG (MA DAG)
              The Master Agent DAG (MADAG) provides DAG workflow scheduling. This agent serves as
              the entry point to the Diet Hierarchy for a client that wants to submit a workflow.
              The language supported by the MADAG is based on XML.

CORBA USAGE FOR DIET

       DIET relies on the CORBA naming service for service discovery  allowing  every  entity  to
       interconnect.  Reference  to  the  omniORB  naming  service  is  written  down  in a CORBA
       configuration file whose path  is  given  to  omniORB  through  the  environment  variable
       OMNIORB_CONFIG.

       The   lines   concerning   the  name server in the omniORB configuration file are built as
       follows:

          InitRef  =  NameService=corbaname::<hostname>:<port>

       The  name  server port is the port given as an argument to the -start option of omniNames.
       You  also  need  to update your LD LIBRARY PATH to  point to <install dir>/lib. So your LD
       LIBRARY PATH environment variable should now be :
          LD LIBRARY PATH=<omniORB home>/lib:<install dir>/lib.

          NB1:  In order to avoid name collision, every agent must be  assigned  a different name
          in the name server; since they don’t have any children, SeDs do not need names assigned
          to them and they don’t register with the name server.

          NB2:  Each  Diet  hierarchy can use a different name server,  or  multiple  hierarchies
          can  share  one  name  server  (assuming  all agents are assigned unique names).  In  a
          multi-MA environment, in order for multiple hierarchies to be able to cooperate  it  is
          necessary that they all share the same name server.

OPTIONS

       config_file
              Configuration file used by the agent to launch the DIET entity

       sched  The  policy  used  for  scheduling  workflows.  This  option can take the following
              values:

              · -basic (default):

              · -g_heft:

              · -g_aging_heft:

              · -fairness:

              · -srpt:

              · -fcfs: first come first serve

       pfm

              · -pfm_any (default)

              · -pfm_sameservices

       IRD

              · -IRD value

DIET CONFIGURATION FILE

       Every DIET entity requires a configuration file.

       Please note that:

       · comments start with ’#’ and finish at the end of the current line,

       · meaningful lines have the format: keyword = value, following the format of configuration
         files for omniORB 4,

       · for options that accept 0 or 1, 0 means no and 1 means yes, and

       · keywords are case sensitive.

       Depending on the type of DIET element, different kinds of  keyword  could be  found.  Here
       is a list of the possible keywords for a DIET Agent configuration file:

       traceLevel
                 Integer value corresponding to the traceLevel for the DIET agent:

                 · 0: DIET do not print anything.

                 · 1: DIET prints only warnings and errors on the standard error output.

                 · 2: [default] DIET prints information on the main steps of a call.

                 · 5: DIET prints information on all internal steps too.

                 · 10: DIET prints all the communication structures too.

                 · >10: (traceLevel - 10) is given to the ORB to print CORBA messages too.

              0 Diet do not print anything, – 1 Diet prints  only  warnings  and  errors  on  the
              standard error output, – 2 [default] Diet prints information on the main steps of a
              call, – 5 Diet prints information on all internal steps too, – 10 Diet  prints  all
              the  communication  structures too, – > 10 (traceLevel - 10) is given to the ORB to
              print CORBA messages too.

       agentType
              three possible values

              · DIET MASTER AGENT (or MA) for a Master Agent

              · DIET LOCAL AGENT (or LA) for a Local Agent

              · DIET_MA_DAG for an MA DAG Agent

       dietPort
              Integer setting the listening port of the agent. If left empty, the ORB will get an
              open port from the system (if default 2809 is busy).

       dietHostName
              String  setting  the  listening interface of the agent. If left empty, the ORB will
              use the system hostname (the first one if several are available).

       name   String identifying the element. Clients and children  nodes  (LAs  and  SeDs)  must
              point to the same CORBA Naming Service hosting the MA.

       parentName
              String identifying the parent agent.

              [Remark: Only DIET Local Agents could use the parentName keyword]

       fastUse
              Boolean  enabling/disabling  FAST module.  If set to 0, all LDAP and NWS parameters
              are ignored, and all requests to FAST are disabled  (when  Diet  is  compiled  with
              FAST).   This  is  useful while testing a DIET platform without having to deploy an
              LDAP base nor an NWS platform.

              [Remark: DIET must be compiled with FAST]

       ldapUse
              Boolean enabling/disabling LDAP support.

              [Remark: DIET must be compiled with FAST]

       ldapBase
              String representing the LDAP base storing FAST-known services address in  the  form
              host:port .

              [Remark: DIET must be compiled with FAST]

       ldapMask
              String specifying the mask registered in the LDAP base.

              [Remark: DIET must be compiled with FAST]

       nwsUse Boolean enabling/disabling NWS support.

              [Remark: DIET must be compiled with FAST]

       nwsNameserver
              String representing the NWS naming service address in the form host:port .

              [Remark: DIET must be compiled with FAST]

       nwsForecaster
              String representing the NWS forecast module used by FAST.

              [Remark: DIET must be compiled with FAST]

       useLogService
              Boolean enabling/disabling the LogService for monitoring purposes.

       lsOutbuffersize
              Integer setting outgoing messages buffer size.

       lsFlushinterval
              Integer setting the flush interval for the outgoing messages buffer.

       neighbours
              String listing MA that must be conntacted to build a federation. It is formatted as
              a white-space separated list of addresses in the form host:port.

              [Remark: DIET must be compiled with the Multi-MA option]

       minimumNeighbours
              Integer setting the minimum connected neighbours. If the agent has  less  connected
              neighbours, it will try establishing new connections.

              [Remark: DIET must be compiled with the Multi-MA option]

       maximumNeighbours
              Integer  setting  the  maximum connected neighbours. Further, the agent will refuse
              newer connections.

              [Remark: DIET must be compiled with the Multi-MA option]

       updateLinkPeriod
              Integer setting the  period  (in  seconds)  at  which  the  agent  will  check  its
              neighbours  status  and  will  try establishing new connections if their numbers is
              less than minimumNeighbours.

              [Remark: DIET must be compiled with the Multi-MA option]

       bindServicePort
              Integer defining the port used by the MA to share its IOR.

              [Remark: Option used only by MAs]

       useConcJobLimit
              Boolean enabling/disabling the  SeD  restriction  about  concurrent  solves.   This
              should be used in conjunction with maxConcJobs.

              [Remark: Option used only by SeDs]

       maxConcJobs
              Integer setting the maximum number of jobs running at once.  This should be used in
              conjunction with maxConcJobs.

              [Remark: Option used only by SeDs]

       locationID
              String used for alternative transfer cost prediction in Dagda.

              [Remark: Option used only by SeDs]

       MADAGNAME
              String corresponding to the name of the MADAG agent.

              [Remark: DIET must be compiled with the workflow option]

              [Remark: Option used only by clients]

       schedulerModule
              Path to the sheduler library module containing the scheduler implementation.

              [Remark:  DIET  must  be compiled with the User Scheduling option]

              [Remark: Option used only by agents]

       moduleConfigFile
              String corresponding to an optional configuration file for the module.

              [Remark: DIET must be compiled with the User Scheduling option]

              [Remark: Option used only by agents]

       batchName
              String corresponding to the name of the queue where the job will be submitted.

              [Remark: DIET must be compiled with the Batch option]

              [Remark: Option used only by SeDs]

       pathToNFS
              Path to the NFS directory where you have read/write permissions.

              [Remark: DIET must be compiled with the Batch option]

              [Remark: Option used only by SeDs]

       pathToTmp
              Path to the temporary directory where you have read/write permissions.

              [Remark: DIET must be compiled with the Batch option]

              [Remark: Option used only by SeDs]

       internOARbatchQueueName
              String only useful when using CORI batch features with OAR 1.6

              [Remark: DIET must be compiled with the Batch option]

              [Remark: Option used only by SeDs]

       initRequestID
              Integer setting the MA Request ID starting value.

              [Remark: Option used only by MAs]

       ackFile
              Path to a file that will be created when the element is ready to execute.

              [Remark: DIET must be compiled with the Acknowledge File option]

              [Remark: Option used only by Agents and SeDs]

       maxMsgSize
              Integer setting the maximum size of CORBA messages sent by Dagda.  By default, it's
              the same as the omniORB giopMaxMsgSize size.

       maxDiskSpace
              Integer  setting maximum disk space available to Dagda for storingt data.  When set
              to 0, Dagda will ignore any  disk  quota.  By  default,  it's  the  same  value  as
              available disk space on the partition set by storageDirectory.

       maxMemSpace
              Integer  setting  the  maximum memory available to Dagda. When set to 0, Dagda will
              ignore any memory usage limitation. By default, no limitations.

       cacheAlgorithm
              String defining the cache replacement algorithm used when Dagda needs  more  memory
              for  storing  a piece of data. Possible values are: LRU, LFU, FIFO.  By default, no
              cache replacement algorithm, Dagda never overwrite data.

       shareFiles
              Boolean enabling/disabling Dagda file sharing with its children.  Requires that the
              path  is  accessible  by  the  children  (ie:  NFS  partition  shared by parent and
              children). By default, no file sharing.

       dataBackupFile
              Path to the backup file used by Dagda on user request (checkpointing).  By default,
              no checkpointing is disabled.

              [Remark: Option used by Agents and ServerDaemon]

       restoreOnStart
              Boolean  defining  if  Dagda have to load the file set by dataBackupFile at startup
              and restore all data recorded during the last  checkpointing  event.   Disabled  by
              default.

              [Remark: Option used by agents and SeDs]

       storageDirectory
              String  defining  the directory where Dagda will store data files.  By default /tmp
              is used.

ENVIRONMENT

       DIET needs some variables to be defined in order for the agent to be able to find all  the
       mandatory library and the CORBA naming service.

       LD_LIBRARY_PATH
              This environment variable must contain the path to the omniORB libraries

       OMNIORB CONFIG
              Path  to  the  CORBA  configuration  file where the reference to the omniORB naming
              service is written.

EXAMPLES

       Here are examples of configuration file for the MA DAG Agent.

          traceLevel = 2
          agentType = DIET_MA_DAG
          name = mad
          parentName = MA1

REPORTING BUGS

       If you find that software interesting, or if you find a bug, please send  us  a  mail:  <‐
       diet-dev@ens-lyon.fr>  with  the  description  of  the problem, the version of the program
       and/or any information that could help us fixing it.

LICENSE AND COPYRIGHT

   Copyright
       (C)2010, GRAAL, INRIA Rhone-Alpes, 46 allee d'Italie, 69364  Lyon  cedex  07,  France  all
       right reserved <diet-dev@ens-lyon.fr>

   License
       This program is free software: you can redistribute it and/or modify it under the terms of
       the GNU General Public License as  published  by  the  Free  Software  Foundation,  either
       version  3  of  the  License,  or  (at  your  option)  any  later version. This program is
       distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the
       implied  warranty  of  MERCHANTABILITY  or  FITNESS  FOR A PARTICULAR PURPOSE. See the GNU
       General Public License for more details. You should  have  received  a  copy  of  the  GNU
       General    Public    License    along    with    this    program.    If    not,   see   <‐
       http://www.gnu.org/licenses/>.

AUTHORS

          GRAAL
          INRIA Rhone-Alpes
          46 allee d'Italie 69364 Lyon cedex 07, FRANCE
          Email: <diet-dev@ens-lyon.fr>
          www: http://graal.ens-lyon.fr/DIET

          SysFera
          13 avenue Albert Einstein
          69100 Villeurbanne, FRANCE
          Email: <contact@sysfera.com>
          www: http://www.sysfera.com

SEE ALSO

       omniNames(1), dietAgent(1), dietForwarder(1)

AUTHOR

       benjamin.depardon@sysfera.com

       License: GPLv3+

COPYRIGHT

       DIET developers