Platform LSF Administration Guide Version 6.2

Contents
Administering Platform LSF
9
28 Running Parallel Jobs . . . . . . . . . . . . . . . . . . . . . . . . . . . 427
How LSF Runs Parallel Jobs . . . . . . . . . . . . . . . . . . . . . . . . . . . 428
Preparing Your Environment to Submit Parallel Jobs to LSF . . . . . . . . . . 429
Submitting Parallel Jobs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 430
Starting Parallel Tasks with LSF Utilities . . . . . . . . . . . . . . . . . . . . 431
Job Slot Limits For Parallel Jobs . . . . . . . . . . . . . . . . . . . . . . . . . 432
Specifying a Minimum and Maximum Number of Processors . . . . . . . . . 433
Specifying a Mandatory First Execution Host . . . . . . . . . . . . . . . . . . 434
Controlling Processor Allocation Across Hosts . . . . . . . . . . . . . . . . . 436
Running Parallel Processes on Homogeneous Hosts . . . . . . . . . . . . . . 439
Using LSF Make to Run Parallel Jobs . . . . . . . . . . . . . . . . . . . . . . 441
Limiting the Number of Processors Allocated . . . . . . . . . . . . . . . . . 442
Reserving Processors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 445
Reserving Memory for Pending Parallel Jobs . . . . . . . . . . . . . . . . . . 447
Allowing Jobs to Use Reserved Job Slots . . . . . . . . . . . . . . . . . . . . 448
Parallel Fairshare . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 455
How Deadline Constraint Scheduling Works For Parallel Jobs . . . . . . . . . 456
Optimized Preemption of Parallel Jobs . . . . . . . . . . . . . . . . . . . . . 457
Part V: Controlling Job Execution
29 Runtime Resource Usage Limits . . . . . . . . . . . . . . . . . . . . . . 461
About Resource Usage Limits . . . . . . . . . . . . . . . . . . . . . . . . . . 462
Specifying Resource Usage Limits . . . . . . . . . . . . . . . . . . . . . . . . 464
Supported Resource Usage Limits and Syntax . . . . . . . . . . . . . . . . . 467
CPU Time and Run Time Normalization . . . . . . . . . . . . . . . . . . . . 472
30 Load Thresholds . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 473
Automatic Job Suspension . . . . . . . . . . . . . . . . . . . . . . . . . . . 474
Suspending Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 476
31 Pre-Execution and Post-Execution Commands . . . . . . . . . . . . . . 479
About Pre-Execution and Post-Execution Commands . . . . . . . . . . . . . 480
Configuring Pre- and Post-Execution Commands . . . . . . . . . . . . . . . 482
32 Job Starters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 485
About Job Starters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 486
Command-Level Job Starters . . . . . . . . . . . . . . . . . . . . . . . . . . 488
Queue-Level Job Starters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 490
Controlling Execution Environment Using Job Starters . . . . . . . . . . . . . 492