Administering Platform LSF - SAS

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$Intel(R) Math Kernel Library for Linux* OS User's Guide$

About Job Chunking About Job Chunking Chunk job candidates LSF supports job chunking, where jobs with similar resource requirements submitted by the same user are grouped together for dispatch. The CHUNK_JOB_SIZE parameter in lsb.queues specifies the maximum number of jobs allowed to be dispatched together in a chunk job. Job chunking can have the following advantages: ◆ Reduces communication between sbatchd and mbatchd, and scheduling overhead in mbatchd ◆ Increases job throughput in mbatchd and more balanced CPU utilization on the execution hosts All of the jobs in the chunk are dispatched as a unit rather than individually. Job execution is sequential, but each chunk job member is not necessarily executed in the order it was submitted. Jobs with the following characteristics are typical candidates for job chunking: ◆ Take between 1 and 2 minutes to run ◆ All require the same resource (for example a software license or a specific amount of memory) ◆ Do not specify a beginning time (bsub -b) or termination time (bsub -t) Running jobs with these characteristics in normal queues can under-utilize resources because LSF spends more time scheduling and dispatching the jobs than actually running them. Configuring a special high-priority queue for short jobs is not desirable because users may be tempted to send all of their jobs to this queue, knowing that it has high priority. 324 Administering Platform LSF
Chapter 24 Chunk Job Dispatch Configuring a Chunk Job Dispatch CHUNK_JOB_SIZE (lsb.queues) Chunk jobs and job throughput To configure a queue to dispatch chunk jobs, specify the CHUNK_JOB_SIZE parameter in the queue definition in lsb.queues. For example, the following configures a queue named chunk, which dispatches up to 4 jobs in a chunk: Begin Queue QUEUE_NAME = chunk PRIORITY = 50 CHUNK_JOB_SIZE = 4 End Queue After adding CHUNK_JOB_SIZE to lsb.queues, use badmin reconfig to reconfigure your cluster. By default, CHUNK_JOB_SIZE is not enabled. Throughput can deteriorate if the chunk job size is too big. Performance may decrease on queues with CHUNK_JOB_SIZE greater than 30. You should evaluate the chunk job size on your own systems for best performance. CHUNK_JOB_DURATION (lsb.params) If CHUNK_JOB_DURATION is set in lsb.params, jobs submitted to a chunk job queue are only chunked if the job has a CPU limit or run limit set in the queue (CPULIMIT or RUNLMIT) or specified at job submission (-c or -W bsub options) that is less than or equal to the value of CHUNK_JOB_DURATION. Jobs are not chunked if: ◆ CPU limit or a run limit is greater than the value of CHUNK_JOB_DURATION. or ◆ No CPU limit and no run limit are specified in the queue (CPULIMIT and RUNLIMIT) or at job submission (-c or -W bsub options). The value of CHUNK_JOB_DURATION is displayed by bparams -l. After adding CHUNK_JOB_DURATION to lsb.params, use badmin reconfig to reconfigure your cluster. By default, CHUNK_JOB_DURATION is not enabled. Administering Platform LSF 325
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Administering Platform LSF® Versio
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Contents Welcome . . . . . . . . .
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Contents Part II: Working with Reso
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Contents 17 Reserving Resources . .
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Contents 30 External Job Submission
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Contents 40 Non-Shared File Systems
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Welcome Contents ◆ “About This
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Welcome Command notation Notation M
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Welcome Platform LSF License Schedu
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Welcome Resource requirement specif
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Welcome Run-time enhancements Threa
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Welcome Environment variables ◆
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Welcome New files added to installa
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Technical Support Contact Platform
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C H A P T E R 1 About Platform LSF
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Chapter 1 About Platform LSF Job sl
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Chapter 1 About Platform LSF Master
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Chapter 1 About Platform LSF Master
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Chapter 1 About Platform LSF Host t
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Chapter 1 About Platform LSF Extern
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Chapter 1 About Platform LSF Job Li
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C H A P T E R 2 How the System Work
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Chapter 2 How the System Works Queu
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Chapter 2 How the System Works Disp
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Job Execution Environment Shared us
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Fault Tolerance Dynamic master host
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P A R T I Managing Your Cluster Con
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Viewing Cluster Information Viewing
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Default Directory Structures Defaul
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Default Directory Structures Window
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Controlling Daemons Controlling Dae
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Controlling mbatchd Controlling mba
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Reconfiguring Your Cluster 3 Run ba
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Host States Host States Host states
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Viewing Host Information Viewing Ho
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Viewing Host Information type Viewi
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Controlling Hosts Controlling Hosts
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Adding a Host Adding a Host Use lsf
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Removing a Host Removing a Host CAU
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Adding and Removing Hosts Dynamical
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Adding and Removing Hosts Dynamical
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Adding Host Types and Host Models t
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Registering Service Ports NIS or NI
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Host Naming Host Naming Network add
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Hosts with Multiple Addresses Examp
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Host Groups Host Groups Where to us
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Tuning CPU Factors Tuning CPU Facto
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Handling Host-level Job Exceptions
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Handling Host-level Job Exceptions
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Queue States Queue States Queue sta
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Viewing Queue Information SCHEDULIN
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Controlling Queues Controlling Queu
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Controlling Queues Dispatch Windows
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Managing Queues Managing Queues Res
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Handling Job Exceptions Configuring
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Job States Job States The bjobs com
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Job States Viewing wait status and
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Viewing Job Information Viewing exc
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Switching Jobs from One Queue to An
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Suspending and Resuming Jobs Suspen
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Sending a Signal to a Job Sending a
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Using Job Groups Creating a job gro
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Using Job Groups % bhist -l 105 You
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Viewing User and User Group Informa
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About User Groups About User Groups
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LSF User Groups LSF User Groups You
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LSF User Groups 134 Administering P
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C H A P T E R 8 Understanding Resou
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Chapter 8 Understanding Resources T
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Chapter 8 Understanding Resources S
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How LSF Uses Resources Viewing job
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Chapter 8 Understanding Resources S
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Chapter 8 Understanding Resources V
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Chapter 8 Understanding Resources A
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C H A P T E R 9 Adding Resources Co
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Adding New Resources to Your Cluste
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Chapter 9 Adding Resources Configur
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Static Shared Resource Reservation
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Chapter 9 Adding Resources Configur
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Chapter 9 Adding Resources ELIM res
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Modifying a Built-In Load Index Con
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P A R T III Scheduling Policies Con
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Specifying Time Values Specifying T
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Specifying Time Expressions Specify
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Automatic Time-based Configuration
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Deadline Constraint Scheduling Dead
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Exclusive Scheduling 176 Administer
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About Preemptive Scheduling About P
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How Preemptive Scheduling Works Job
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Configuring Preemptive Scheduling Q
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Configuring Preemptive Scheduling 1
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About Resource Requirements About R
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Queue-Level Resource Requirements V
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About Resource Requirement Strings
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Selection String Selection String S
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Order String Order String Syntax De
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Usage String Example rusage[mem=50:
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Span String Span String Syntax A sp
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Same String 200 Administering Platf
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About Fairshare Scheduling About Fa
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User Share Assignments Examples ◆
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Dynamic User Priority Default dynam
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Host Partition Fairshare Host Parti
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Queue-Level User-based Fairshare Qu
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Cross-queue Fairshare bqueues -l al
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Cross-queue Fairshare 3 In all the
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Hierarchical Fairshare Viewing hier
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Queue-based Fairshare Queue-based F
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Configuring Slot Allocation per Que
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Viewing Queue-based Fairshare Alloc
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Typical Slot Allocation Scenarios T
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Typical Slot Allocation Scenarios W
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Typical Slot Allocation Scenarios T
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Using Historical and Committed Run
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Using Historical and Committed Run
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Users Affected by Multiple Fairshar
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Ways to Configure Fairshare Ways to
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Ways to Configure Fairshare Example
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Using Goal-Oriented SLA Scheduling
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Using Goal-Oriented SLA Scheduling
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Configuring Service Classes for SLA
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Viewing Information about SLAs and
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Viewing Information about SLAs and
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Understanding Service Class Behavio
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C H A P T E R 16 Resource Allocatio
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Chapter 16 Resource Allocation Limi
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C H A P T E R 17 Reserving Resource
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Chapter 17 Reserving Resources Usin
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Page 277 and 278: C H A P T E R 18 Managing Software
Page 279 and 280: Host Locked Licenses Chapter 18 Man
Page 281 and 282: Network Floating Licenses Chapter 1
Page 283 and 284: Chapter 18 Managing Software Licens
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Page 287 and 288: Run Windows Configuring run windows
Page 289 and 290: C H A P T E R 20 Job Dependencies C
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Page 295 and 296: C H A P T E R 21 Job Priorities Con
Page 297 and 298: Chapter 21 Job Priorities Specifyin
Page 299 and 300: C H A P T E R 22 Job Requeue and Jo
Page 301 and 302: Chapter 22 Job Requeue and Job Reru
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Page 313 and 314: Checkpointing a Job Prerequisites C
Page 315 and 316: Making Jobs Checkpointable Manually
Page 317 and 318: Enabling Periodic Checkpointing At
Page 319 and 320: Restarting Checkpointed Jobs Requir
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Page 323: C H A P T E R 24 Chunk Job Dispatch
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Page 331 and 332: C H A P T E R Ë 25 Job Arrays LSF
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Page 343: P A R T V Controlling Job Execution
Page 346 and 347: About Resource Usage Limits About R
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Page 358 and 359: CPU Time and Run Time Normalization
Page 360 and 361: Automatic Job Suspension Automatic
Page 362 and 363: Suspending Conditions Suspending Co
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Page 366 and 367: About Pre-Execution and Post-Execut
Page 368 and 369: Configuring Pre- and Post-Execution
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Page 372 and 373: About Job Starters About Job Starte
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Command-Level Job Starters Command-
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Queue-Level Job Starters Queue-Leve
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Controlling Execution Environment U
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Understanding External Executables
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Using esub Option LSB_SUB_EXCEPTION
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Using esub General esub logic Rejec
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Using esub # Deny userC the ability
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Working with eexec Working with eex
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Default Job Control Actions Default
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Configuring Job Control Actions Con
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Configuring Job Control Actions Exa
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Customizing Cross-Platform Signal C
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C H A P T E R 32 Interactive Jobs w
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Chapter 32 Interactive Jobs with bs
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Interactive Batch Job Messaging Lim
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Running X Applications with bsub Ch
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C H A P T E R 33 Running Interactiv
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Chapter 33 Running Interactive and
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Interactive Tasks Chapter 33 Runnin
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P A R T VII Running Parallel Jobs C
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How LSF Runs Parallel Jobs How LSF
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Submitting Parallel Jobs Submitting
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Submitting MPI Jobs Submitting MPI
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Starting Parallel Tasks with LSF Ut
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Specifying a Minimum and Maximum Nu
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Specifying a Mandatory First Execut
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Controlling Processor Allocation Ac
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Running Parallel Processes on Homog
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Using LSF Make to Run Parallel Jobs
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Limiting the Number of Processors A
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Reserving Processors Reserving Proc
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Reserving Memory for Pending Parall
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Allowing Jobs to Use Reserved Job S
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Allowing Jobs to Use Reserved Job S
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Parallel Fairshare Parallel Fairsha
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Optimized Preemption of Parallel Jo
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About Advance Reservation About Adv
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Configuring Advance Reservation ◆
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Using Advance Reservation Adding a
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Using Advance Reservation Removing
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Using Advance Reservation 6:10 0 10
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Using Advance Reservation Modifying
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Using Advance Reservation 474 Admin
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C H A P T E R 36 Event Generation C
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Chapter 36 Event Generation Events
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C H A P T E R 37 Tuning the Cluster
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Adjusting LIM Parameters RUNWINDOW
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Chapter 37 Tuning the Cluster Compa
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Changing Default LIM Behavior to Im
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Chapter 37 Tuning the Cluster Whene
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Tuning mbatchd on UNIX Operating sy
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C H A P T E R 38 Authentication Con
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Chapter 38 Authentication eauth -c
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Chapter 38 Authentication How LSF d
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Chapter 38 Authentication Correctin
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Chapter 38 Authentication About Dae
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User Account Mapping Chapter 38 Aut
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C H A P T E R 39 Job Email, and Job
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Chapter 39 Job Email, and Job File
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C H A P T E R 40 Non-Shared File Sy
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Chapter 40 Non-Shared File Systems
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Chapter 40 Non-Shared File Systems
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C H A P T E R 41 Error and Event Lo
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Chapter 41 Error and Event Logging
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System Event Log CAUTION Chapter 41
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Chapter 41 Error and Event Logging
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C H A P T E R 42 Troubleshooting an
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Common LSF Problems LIM dies quietl
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Chapter 42 Troubleshooting and Erro
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Setting Daemon Timing Levels Chapte
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P A R T IX LSF Utilities Contents
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About lstcsh About lstcsh The lstcs
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Local and Remote Modes Local and Re
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Differences from Other Shells Diffe
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Starting lstcsh Starting lstcsh Sta
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Host Redirection Host Redirection E
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Built-in Commands Built-in Commands
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Writing Shell Scripts in lstcsh Wri
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Index job migration 321 job requeue
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Index D daemons authd 496 authentic
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Index file spooling. See command fi
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Index Internet addresses, matching
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Index host locked 279 interactive j
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Index pre-42 UNIX directory structu
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Index disabling 317 job-level 317 q
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Index associating with hosts 155 Bo
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Index status closed in bhosts 70 jo
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Index 580 Administering Platform LS
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