Legion 1.6.4

Basic User Manual

Before you start

1.0 Introduction
1.1 About this manual
1.2 Style conventions
1.3 About Legion

Getting started

2.0 Setting up and logging in
2.1 Preparing your Legion environment
2.2 Logging in to a Legion system
2.2.1 Logging in as a user
2.2.2 Changing your password
2.2.3 About object permissions
2.2.4 Checking your log in status
2.2.5 Logging out
2.2.6 Using Legion in a Kerberos environment

Context space

3.0 An introduction to context space

4.0 Context space

4.1 Legion object names
4.2 About the LOID
4.3 Organizing context space
5.0 Working in context space
5.1 Viewing contexts
5.1.1 View a context's contents
5.1.2 Looking up LOIDs
5.1.3 Create a new context
5.1.4 Changing the working context
5.1.5 Verify the current working context
5.2 Naming
5.2.1 Alternate names for existing contexts
5.2.2 Assigning a context name to a LOID
5.2.3 Renaming an object
5.2.4 Listing an object's names
5.2.5 Removing names and objects
5.2.6 Using the same name in different contexts
5.3 Moving between local files and contexts
5.3.1 Copying a local file to a Legion file object
5.3.2 Copying a Legion file object
5.3.3 Viewing a file object's contents
5.3.4 Importing a local Unix tree
5.3.5 Link a directory to context space
6.0 Host and vault objects
6.1 What is a host object and vault object?
6.2 About the bootstrap host and vault
6.3 Creating objects on new hosts
6.4 Instance placement on hosts and vaults
7.0 The GUI

Running applications

8.0 Running a Legion application

9.0 PVM

9.1 Core PVM interface
9.2 Tids & LOIDs
9.3 Task classes
9.4 Installing PVM-Legion
9.5 Compilation
9.6 Registering compiled tasks
9.7 Examples
9.8 Running PVM code with the fewest changes
10.0 MPI
10.1 Legion MPI
10.1.1 Task classes
10.1.2 Installing Legion MPI
10.1.3 Compilation
10.1.4 Register compiled tasks
10.1.5 Running the MPI application
10.1.6 Example
10.1.7 Accessing files in programs using MPI
10.1.8 Scheduling MPI processes
10.1.9 Debugging support
10.1.10 Checkpointing support Example API (C & Fortran) Running the above example Recovering from failure Restarting application Compiling/makefile Another example Limitations
10.1.11 Functions supported
10.1.12 Running a Legion MPI code with the fewest changes
10.2 Native MPI
10.2.1 Task classes
10.2.2 Compilation
10.2.3 Register compiled tasks
10.2.4 Running a native MPI application
10.2.5 Making Legion calls from native MPI programs
10.2.6 Example
10.2.7 Scheduling native MPI processes
11.0 Executing remote programs
11.1 Introduction
11.2 Linked and independent programs
11.3 Registering independent programs
11.4 Registering Legion-linked programs
11.5 Running a remote program
11.6 Converting a C/C++ program
11.7 Summary
12.0 Replaying & debugging applications
12.1 Sample record and replay


A-1 Sample makefile

A-2 About Legion tty objects

A-2.1 Simple tty management
A-2.2 Complex tty management
A-3 Alphabetical list of Legion commands

A-4 Subject listing of Legion commands

A-4.1 Calls on objects
A-4.2 Calls on class objects
A-4.3 Calls on LegionClass
A-4.4 Calls on file and context objects
A-4.5 Start-up and shutdown functions
A-4.6 Scheduling support
A-4.7 General functions about the state of the system
A-4.8 Security
A-4.9 Application development
A-4.10 Program support

Getting help



The Legion Group
Department of Computer Science
School of Engineering & Applied Science
University of Virginia
151 Engineer's Way, P.O. Box 400740
Charlottesville, VA 22904-4740

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