Fri, Jul
4 New Articles

Tech Tip: Investigating CL Routing Entry Commands

  • Smaller Small Medium Big Bigger
  • Default Helvetica Segoe Georgia Times

The i offers a variety of CL commands to help us control and subdue the i. But some of them are more familiar than others. Let's look at one particular family of commands.


Sometimes, on a cold winter evening, as I sit quietly in my den dressed in my favorite smoking jacket and puff contentedly on one of my favorite pipes while a fire crackles on the hearth, I like to take an obscure CL command and just investigate the living daylights out of it. Unfortunately, I also do it during the blazing hot summer when I have had a few too many Sunset Susan cocktails. And that is the case this time.

A rather obscure family of commands (ADDRTGE, CHGRTGE, RMVRTGE) allow you to do all sorts of things to routing entries or at least "all sorts of things" if all you want to do is add, change, and remove routing entries. Now if I only knew what a routing entry was.

Routing Entries

A routing entry is part of the subsystem description. Basically, it defines what happens to a job once it hits the subsystem. OK, so far, so good. A little bit more information can't hurt.

When a job is kicked off, it's directed to a specific subsystem. When it hits the subsystem, the IBM i compares a value in the routing data that accompanies the job to the routing entries that are defined for a subsystem and then assigns the job to a specific routing entry.

That is, the SBMJOB command has a RTGDTA parm where you can specify what compare value you want to use for that job. The default is QCMDB. You can also use *JOBD, which will then use the RTGDTA parm from that command. Or you can key in your own value if you are the willful sort.

A given subsystem can have multiple routing entries, but only one is matched up with a given job. At the same time, you could have several jobs submitted with the same routing entry data.

Anyway, no matter how it is set, the routing entry then assigns a pool, a class, and the system controlling program (like QCMD) to be used with this job. The pool is a memory storage pool, a subset of the total system storage, which is set up manually when you configure or tune your machine. It basically defines how much space the job will have to run in. The class is a system object that contains, among other things, the time slice and the priority for the run time for that job. Finally, the controlling job indicates what system program will oversee the running of this job.

More About Routing Entries

Technically, the routing entry consists of the following primary parms.

  • Class (CLS) is the name of the system object that contains the runtime attributes that will be used to run this jobthings like the time slice, the run priority, eligibility for purge, etc. None of the routing commands creates the class; they just use one that already exists. Only one of the Guardians of the Galaxy (except maybe for Drax) is allowed to create or modify classes.
  • Comparison Data (CMPVAL) is the data that's compared against the routing data from the job entry to see which routing entry pairs up with which job.
  • Maximum Active Routing Steps (MAXACT) is the maximum number of jobs or routing steps that may be active at the same time via this routing entry.
  • Memory Pool ID (POOLID) is the Pool ID of the storage pool that the job associated with this routing entry should run inthat is, a pool within the subsystem the job has been assigned to.
  • Program to Call (PGM) is the system program that will control the execution of this job.
  • Sequence Number (SEQNBR) defines the order in which the routing entries are searched to look at the comparison data.

There are other parms, but I don't care about them, so the less said the better. (Do you know of any IBM commands that don't have at least 20 parms that nobody understands?) I believe in knowing just enough to be dangerous. It keeps everyone else on their toes.

The Commands of Routing Entries

You would think there would be a Work with Routing Entries (WRKRTGE) command, something that allows you to list them all and create, change, delete, display, etc. the routing entries that exist for a given subsystem (remember, routing entries always start with a subsystem). But that's not the way it works in this man's army. Instead, you have three separate commands for three separate things.

  • ADDRTGEDuh, it adds routing entries to a given subsystem.
  • CHGRTGEFor those of you who can't figure it out, this allows you to change an existing routing entry.
  • RMVRTGEAnd for Groot or Drax, it removes a routing entry.

The only thing you can't do is see what routing entries are already out there for a given subsystem (because remember that routing entries are not things in their own right; they only have meaning within a subsystem they are defined for). Nor is it as easy as just deciding to do a CHGRTGE for QBATCH sequence 1 (for example) because the sequence numbers are in a range from 1–9999, but there may not be a number 1. I don't really get that, but then again I'm not one of the Guardians of the Galaxy, so maybe it's none of my business.


I think the lesson to take out of thisand maybe the reason there is no WRKRTGE commandis you have no business screwing around with routing entries that come with the system. I mean really, you think you're going to improve things? What do you think this is? UNIX?

But if you feel the need, you can add, change, and remove the routing entries that you add to the system configuration. Just be careful. With great power comes yada, yada, yada.


David Shirey

David Shirey is president of Shirey Consulting Services, providing technical and business consulting services for the IBM i world. Among the services provided are IBM i technical support, including application design and programming services, ERP installation and support, and EDI setup and maintenance. With experience in a wide range of industries (food and beverage to electronics to hard manufacturing to drugs--the legal kind--to medical devices to fulfillment houses) and a wide range of business sizes served (from very large, like Fresh Express, to much smaller, like Labconco), SCS has the knowledge and experience to assist with your technical or business issues. You may contact Dave by email at This email address is being protected from spambots. You need JavaScript enabled to view it. or by phone at (616) 304-2466.

MC Press books written by David Shirey available now on the MC Press Bookstore.

21st Century RPG: /Free, ILE, and MVC 21st Century RPG: /Free, ILE, and MVC
Boost your productivity, modernize your applications, and upgrade your skills with these powerful coding methods.
List Price $69.95

Now On Sale



Support MC Press Online

$0.00 Raised:

Book Reviews

Resource Center

  • SB Profound WC 5536 Have you been wondering about Node.js? Our free Node.js Webinar Series takes you from total beginner to creating a fully-functional IBM i Node.js business application. You can find Part 1 here. In Part 2 of our free Node.js Webinar Series, Brian May teaches you the different tooling options available for writing code, debugging, and using Git for version control. Brian will briefly discuss the different tools available, and demonstrate his preferred setup for Node development on IBM i or any platform. Attend this webinar to learn:

  • SB Profound WP 5539More than ever, there is a demand for IT to deliver innovation. Your IBM i has been an essential part of your business operations for years. However, your organization may struggle to maintain the current system and implement new projects. The thousands of customers we've worked with and surveyed state that expectations regarding the digital footprint and vision of the company are not aligned with the current IT environment.

  • SB HelpSystems ROBOT Generic IBM announced the E1080 servers using the latest Power10 processor in September 2021. The most powerful processor from IBM to date, Power10 is designed to handle the demands of doing business in today’s high-tech atmosphere, including running cloud applications, supporting big data, and managing AI workloads. But what does Power10 mean for your data center? In this recorded webinar, IBMers Dan Sundt and Dylan Boday join IBM Power Champion Tom Huntington for a discussion on why Power10 technology is the right strategic investment if you run IBM i, AIX, or Linux. In this action-packed hour, Tom will share trends from the IBM i and AIX user communities while Dan and Dylan dive into the tech specs for key hardware, including:

  • Magic MarkTRY the one package that solves all your document design and printing challenges on all your platforms. Produce bar code labels, electronic forms, ad hoc reports, and RFID tags – without programming! MarkMagic is the only document design and print solution that combines report writing, WYSIWYG label and forms design, and conditional printing in one integrated product. Make sure your data survives when catastrophe hits. Request your trial now!  Request Now.

  • SB HelpSystems ROBOT GenericForms of ransomware has been around for over 30 years, and with more and more organizations suffering attacks each year, it continues to endure. What has made ransomware such a durable threat and what is the best way to combat it? In order to prevent ransomware, organizations must first understand how it works.

  • SB HelpSystems ROBOT GenericIT security is a top priority for businesses around the world, but most IBM i pros don’t know where to begin—and most cybersecurity experts don’t know IBM i. In this session, Robin Tatam explores the business impact of lax IBM i security, the top vulnerabilities putting IBM i at risk, and the steps you can take to protect your organization. If you’re looking to avoid unexpected downtime or corrupted data, you don’t want to miss this session.

  • SB HelpSystems ROBOT GenericCan you trust all of your users all of the time? A typical end user receives 16 malicious emails each month, but only 17 percent of these phishing campaigns are reported to IT. Once an attack is underway, most organizations won’t discover the breach until six months later. A staggering amount of damage can occur in that time. Despite these risks, 93 percent of organizations are leaving their IBM i systems vulnerable to cybercrime. In this on-demand webinar, IBM i security experts Robin Tatam and Sandi Moore will reveal:

  • FORTRA Disaster protection is vital to every business. Yet, it often consists of patched together procedures that are prone to error. From automatic backups to data encryption to media management, Robot automates the routine (yet often complex) tasks of iSeries backup and recovery, saving you time and money and making the process safer and more reliable. Automate your backups with the Robot Backup and Recovery Solution. Key features include:

  • FORTRAManaging messages on your IBM i can be more than a full-time job if you have to do it manually. Messages need a response and resources must be monitored—often over multiple systems and across platforms. How can you be sure you won’t miss important system events? Automate your message center with the Robot Message Management Solution. Key features include:

  • FORTRAThe thought of printing, distributing, and storing iSeries reports manually may reduce you to tears. Paper and labor costs associated with report generation can spiral out of control. Mountains of paper threaten to swamp your files. Robot automates report bursting, distribution, bundling, and archiving, and offers secure, selective online report viewing. Manage your reports with the Robot Report Management Solution. Key features include:

  • FORTRAFor over 30 years, Robot has been a leader in systems management for IBM i. With batch job creation and scheduling at its core, the Robot Job Scheduling Solution reduces the opportunity for human error and helps you maintain service levels, automating even the biggest, most complex runbooks. Manage your job schedule with the Robot Job Scheduling Solution. Key features include:

  • LANSA Business users want new applications now. Market and regulatory pressures require faster application updates and delivery into production. Your IBM i developers may be approaching retirement, and you see no sure way to fill their positions with experienced developers. In addition, you may be caught between maintaining your existing applications and the uncertainty of moving to something new.

  • LANSAWhen it comes to creating your business applications, there are hundreds of coding platforms and programming languages to choose from. These options range from very complex traditional programming languages to Low-Code platforms where sometimes no traditional coding experience is needed. Download our whitepaper, The Power of Writing Code in a Low-Code Solution, and:

  • LANSASupply Chain is becoming increasingly complex and unpredictable. From raw materials for manufacturing to food supply chains, the journey from source to production to delivery to consumers is marred with inefficiencies, manual processes, shortages, recalls, counterfeits, and scandals. In this webinar, we discuss how:

  • The MC Resource Centers bring you the widest selection of white papers, trial software, and on-demand webcasts for you to choose from. >> Review the list of White Papers, Trial Software or On-Demand Webcast at the MC Press Resource Center. >> Add the items to yru Cart and complet he checkout process and submit

  • Profound Logic Have you been wondering about Node.js? Our free Node.js Webinar Series takes you from total beginner to creating a fully-functional IBM i Node.js business application.

  • SB Profound WC 5536Join us for this hour-long webcast that will explore:

  • Fortra IT managers hoping to find new IBM i talent are discovering that the pool of experienced RPG programmers and operators or administrators with intimate knowledge of the operating system and the applications that run on it is small. This begs the question: How will you manage the platform that supports such a big part of your business? This guide offers strategies and software suggestions to help you plan IT staffing and resources and smooth the transition after your AS/400 talent retires. Read on to learn: