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Compaq SC RMS 2.3.1 The Structure of the RMS, 2.3.2 The RMS Daemons

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The Role of the RMS

Scheduling deciding when and where to run parallel jobs

Audit maintaining an audit trail of system state changes

From the user’s point of view,RMS provides tools for:

Information querying the resourcesof the system

Execution loading and running parallel programs on a given set of resources

Monitoring monitoring the execution of parallel programs

2.3.1 The Structure of the RMS

RMS is implemented as a set of UNIX commands anddaemons, programmed in C and

C++, using sockets for communications. All of the details of the system (its

conﬁguration, its current state, usage statistics) are maintained in a SQL database, as

shown in Figure 2.3. See Section 2.3.4 for an overview and

Chapter 10 (TheRMS Database)fordetails of the database.

2.3.2 The RMS Daemons

A set of daemons provide the services required for managing the resources of the system.

Todo this, the daemons both query and update thedatabase (see Section 2.3.4).

•The Database Manager,msqld, provides SQL database services.

•The Machine Manager,mmanager, monitors the status of nodes in an RMS system.

•The PartitionManager,pmanager, controls the allocation of resources to usersand

the scheduling of parallel programs.

•The Switch NetworkManager,swmgr, supervisesthe operation of the Compaq

AlphaServer SC Interconnect, monitoring it for errors and collecting performance

data.

•The Event Manager,eventmgr, runs handlers in response to system incidents and

notiﬁes clients who have registered an interest in them.

•The TransactionLog Manager,tlogmgr, instigates database transactionsthat have

been requested in the TransactionLog. Allclient transactions aremade through this

mechanism. This ensures that changes to the database are serialized and an audit

trail is kept.

•The Process Manager,rmsmhd, runs on each node in the system. It starts the other

RMS daemons.

2-4 Overview of RMS

Contents

Main Document Revision History Contents Page Page Page Page Page Page Page List of Figures Page List of Tables Page Introduction 1.1 Scope of Manual 1.2 Audience 1.3 Using this Manual Page 1.4 Related Information 1.5 Location of Online Documentation 1.6 Readers Comments 1.7 Conventions Page Overview of RMS 2.1 Introduction 2.2 The System Architecture 2.2.1 Nodes ... 2.3 The Role of the RMS 2.3.1 The Structure of the RMS 2.3.2 The RMS Daemons 2.3.3 The RMS Commands 2.3.4 The RMS Database 2.4 RMS Management Functions 2.4.1 Allocating Resources Parallel 2.4.2 Scheduling 16Nodes 4CPUs 2.4.3 Access Control and Accounting 2.4.4 RMS Conguration Parallel Programs Under RMS 3.1 Introduction 3.2 Resource Requests 3.3 Loading and Running Programs Page Page Page RMS Daemons 4.1 Introduction 4.1.1 Startup 4.1.2 Log Files 4.1.3 Daemon Status 4.2 The Database Manager 4.3 The Machine Manager 4.3.1 Interaction with the Database 4.4 The Partition Manager 4.4.1 Partition Startup 4.4.2 Interaction with the Database 4.5 The Switch Network Manager 4.5.1 Interaction with the Database 4.6 The Transaction Log Manager 4.6.1 Interaction with the Database 4.7 The Event Manager 4.7.1 Interaction with the Database 4.8 The Process Manager 4.8.1 Interaction with the Database 4.9 The RMS Daemon 4.9.1 Interaction with the Database RMS Commands 5.1 Introduction Page Page Page ENVIRONMENT VARIABLES WARNINGS Page Page Page Page Page Page Page Page Page ENVIRONMENT VARIABLES Page Page WARNINGS Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page Page rmsctl(1) Tostart the RMS system, use rmsctl as follows: Toshow the status of the RMS system, use rmsctl as follows: rcontrol 5-38 RMS Commands Page Page Page Page Page Page Page Page Access Control, Usage Limits and Accounting 6.1 Introduction 6.2 Users and Projects 6.3 Access Controls 6.3.1 Access Controls Example 6.4 How Access Controls are Applied 6.4.1 Memory Limit Rules 6.4.2 Priority Rules 6.4.3 CPU Usage Limit Rules 6.5 Accounting Page Page RMS Scheduling 7.1 Introduction 7.2 Scheduling Policies 7.3 Scheduling Constraints 7.4 What Happens When a Request is Received Page 7.4.1 Memory Limits 7.4.2 Swap Space 7.4.3 Time Slicing 7.4.4 Suspend and Resume 7.4.5 Idle Time Event Handling 8.1 Introduction 8.1.1 Posting Events 8.1.2 Waiting on Events 8.2 Event Handling 8.3 List of Events Generated Page 8.3.1 Extending the RMS Event Handling Mechanism Setting up RMS 9.1 Introduction 9.2 Installation Planning 9.2.1 Node Names 9.3 Setting up RMS 9.3.1 Starting RMS 9.3.2 Initial Setup with One Partition 9.3.3 Simple Day/Night Setup 9.4 Day-to-Day Operation 9.4.1 Periodic Shift Changes 9.4.2 Backing Up the Database 9.4.3 Summarizing Accounting Data 9.4.4 Archiving Data 9.4.5 Database Maintenance Page 9.4.6 Conguring Nodes Out 9.5 Local Customization of RMS 9.5.1 Partition Startup 9.5.2 Core File Handling 9.5.3 Event Handling 9.5.4 Switch Manager Conguration 9.6 Log Files The RMS Database 10.1 Introduction 10.1.1 General Information about the Tables 10.1.2 Access to the Database 10.1.3 Categories of Table Page 10.2 Listing of Tables 10.2.1 The Access Controls Table 10.2.2 The Accounting Statistics Table Page 10.2.3 The Attributes Table Page 10.2.4 The Elans Table 10.2.5 The Elites Table 10.2.6 The Events Table 10.2.7 The Event Handlers Table 10.2.8 The Fields Table 10.2.9 The Installed Components Table 10.2.10 The Jobs Table 10.2.11 The Link Errors Table 10.2.12 The Modules Table 10.2.13 The Module Types Table 10.2.14 The Nodes Table 10.2.15 The Node Statistics Table 10.2.16 The Partitions Table Page 10.2.17 The Projects Table 10.2.18 The Resources Table 10.2.19 The Servers Table 10.2.20 The Services Table 10.2.21 The Software Products Table 10.2.22 The Switch Boards Table 10.2.23 The Transactions Table 10.2.24 The Users Table A Compaq AlphaServer SC Interconnect Terms A.1 Introduction Page Page A.2 Link States A.3 Link Errors B RMS Status Values B.1 Overview B.2 Generic Status Values B.3 Job Status Values B.4 Link Status Values B.5 Module Status Values B.6 Node Status Values B.7 Partition Status Values B.8 Resource Status Values B.9 Transaction Status Values C RMS Kernel Module C.1 Introduction C.2 Capabilities C.3 System Call Interface Page Page Page Page Page Page Page Page Page Page Page Page D RMS Application Interface D.1 Introduction Page Page Page Page Page Page Page E Accounting Summary Script E.1 Introduction E.2 Command Line Interface E.3 Example Output E.4 Listing of the Script Accounting Summary Script E-3 E-4 Accounting Summary Script Accounting Summary Script E-5 E-6 Accounting Summary Script Accounting Summary Script E-7 E-8 Accounting Summary Script Glossary Abbreviations Page Terms Page Page Page Index A B C D E G I J L P R S T U