CERN – BT – 01/07/ Cern Fabric Management -Hardware and State Bill Tomlin GridPP 7 th Collaboration Meeting June/July 2003

CERN – BT – 01/07/ Introduction u Hardware Management System l Addresses issues like u Informal workflows which dont scale for LCG u Manual, labour intensive work u Where are the boxes and what are they u State Management System l Enables configuration with high level directives l Deliver to nodes their desired state using EDG WP4 s/w l Integrate with HMS, installation, configuration, monitoring, fault tolerance

CERN – BT – 01/07/

CERN – BT – 01/07/ HMS Tools u A workflow tracking tool l Consistent, traceable, formal workflows l Handle multiple machines at a time l Automatically request installs, retires etc. l Handle delays u A visualisation tool l Enables location of objects in CC

CERN – BT – 01/07/ HMS Workflow Application

CERN – BT – 01/07/ HMS Visualisation Tool

CERN – BT – 01/07/ State Management…

CERN – BT – 01/07/ State Management System u Manage state during l Hardware Use Cases u Installations u Moves u Repairs u Retirements l Monitoring Alarms and Fault tolerance l Software Updates u Leverages EDG WP4 CDB…

CERN – BT – 01/07/ ClientServer XML HLDL PAN DBM Notification + Transfer Low Level API High Level API Component Access API GUI Subscription CVS EDG WP4 Configuration

CERN – BT – 01/07/

CERN – BT – 01/07/ Scenario: HMS Move

CERN – BT – 01/07/ Status u HMS Workflow Application l In production for all Use Cases l Must integrate with EDG configuration components, SMS l Maintenance u HMS Visualisation l In production l Search for more things in more places l View and change (?) their properties u State Management l Have an architectural prototype; CDB still evolving l Requirements need iterating over l Configuration of valid states and transitions l Can write actuators to implement state transitions on node l Need to interoperate with LCG fabric management components l Trivial to expose as a web service

CERN – BT – 01/07/ Questions