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9: EnterpriseOne Kernel Architecture
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[JDENET_KERNEL_DEF12] krnlName=UBE SUBSYSTEM KERNEL dispatchDLLName=jdekrnldll dispatchDLLFunction=_JDEK_DispatchUBESBSMessage@28 maxNumberOfProcesses=1 numberOfAutoStartProcesses=0
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As you can see from this subset, each of the kernel definitions has its own stanza in the JDEINI file Within this stanza you can identify the kernel based on the krnlName value (As you become more familiar with the EnterpriseOne product, you might also start referring to the kernels by their definitions, like Kernel Def6 [Call Object kernel]) The dispatchDLLname defines the kernel This will vary based on the platform you are working with (for example, NT has DLL, UNIX has so or sl, and so on) This identified file can be found in the system/lib directory for the enterprise server The dispatchDLLFunction value defined the function call in the identified library for each type of kernel This is important as these two fields differentiate the kernel definitions from each other This is what tells EnterpriseOne how to call the separate kernel types The administrator can use the maxNumberOfProcesses value to define the maximum number of kernels of that type that can be started on the system If the kernels are not configured to start automatically via the numberOf AutoStartProcesses, they will spawn when a request comes into the system for that type of kernel process This will continue until the maxNumberOfProcesses is reached At that point the kernel processes will round robin requests between them During this process the software attempts to keep the users load-balanced across the Call Object kernels, thereby attempting to keep the user count as equal as possible for each kernel
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As with all things in EnterpriseOne, a little planning goes a long way If you do not have a large implementation, you might not require different servers to handle different requirements In that case you want to tune your enterprise server to meet the general needs of your implementation (in other words, you need to find a happy medium between the different types of requests that the implementation will make on the server) If, on the other hand, you have a larger implementation, you really should start out by asking yourself what you are going to use this server for This will help guide you in tuning the servers and the overall implementation With larger implementations, it becomes effective to tier your system This means that you have different layers to address separate business requirements For example, you might have a separate server for batch processes versus interactive application calls (such as BSFN) This is essentially tiering your implementation into two separate components, batch and interactive This enables you to tune each of the servers to meet the need that each is serving As batch processes do not utilize Call Object kernels, the batch server would not require that many if any call objects are defined;
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however, it might require more UBE kernels In this manner you can configure the servers to meet specific needs in your implementation
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Monitoring EnterpriseOne Kernel Processes
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Now that we have defined some of the kernels and have them running on the system, how do we know if they are working correctly To determine the answer to this question, we can take advantage of a number of tools available to us Let s start out with the netwm tool on the enterprise server This tool is delivered with the software and provides the ability to dump information about the kernel processes This can be very useful in auditing how your kernel settings are doing on the server This application will read data stored in shared memory and retrieve specific information about the kernel processes, such as: Type of kernel process For example, Def6 would be Call Object kernels
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The user count associated with the kernel This represents the number of users connected to the kernel process This is very important for monitoring the load on an EnterpriseOne server If too many users are associated with a kernel process, it can result in outstanding requests Outstanding requests When the kernel process is too busy to service a request right away, the outstanding request goes into a wait until the kernel frees up enough resources to answer the request In a properly tuned implementation you should not have outstanding requests
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As this tool resides on the enterprise server, it can be useful for scripting custom alerting processes By configuring this tool to run at specific times and to write to a log file, you can generate a performance profile of the kernel processes on your server(s) With this information you can determine how best to adjust your kernel settings in response to changes in load on your system While the netwm tool is very useful, it is not as user-friendly as the SAW tool You will find that there are a number of parameters that can be passed to the netwm tool (you can type netwm h for a list of options) However, it is important to be careful with these options, as some of them modify the data in shared memory NOTE We would recommend only providing SAW access to system administrators as configurationrelated information can be viewed via SAW As of 897, Server Manager provides the ability to more closely limit what type of access a user has to the monitoring/administration functions
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