Which artifacts are needed, at minimum, to add a custom extension to a Machine Agent?
To add a custom extension to a Machine Agent, you need at least three artifacts: a directory, a jar or script file, and a monitor.xml file12. The directory is where you place your extension files under the <machine_agent_home>/monitors directory. The jar or script file is the executable file that collects and reports the custom metrics to the Machine Agent. The monitor.xml file is the configuration file that defines the name, frequency, and parameters of your extension.You can also optionally include other files such as libraries, configuration files, or templates for your extension12.Reference:Build a Monitoring Extension Using Scripts,Extensions and Custom Metrics
What is the most important factor in determining sizing for AppDynamics Controller?
The most important factor in determining sizing for AppDynamics Controller is the projected metric load per minute on the Controller. This is because the metric load represents the actual workload on the Controller, which depends on the nature of the application, the AppDynamics configuration, and the usage patterns. The number of agents, the type of agents, the number of administrators/end users, and the number of AppDynamics applications are only rough estimates that can vary greatly depending on the specific scenario. Therefore, it is recommended to test the performance of the system in a staging environment and verify the Controller sizing using the metric upload rate before deploying to production.Reference:Controller System Requirements,Performance and Controller sizing guidelines,How to Run AppDynamics in Microsoft Azure,Platform Requirements
What are the correct steps to install a .NET Agent patch?
To install a .NET Agent patch, which is a minor update to the existing .NET Agent version, you do not need to uninstall the old agent or restart the machine. You only need to follow these steps:
Download the .NET Agent patch from the AppDynamics Download Center.
Launch an elevated command prompt with full administrator privileges.
Execute the Installer.bat file from the patch archive. The batch file installs the patch and starts the AppDynamics Agent Coordinator service.
Restart the instrumented applications, such as IIS, Windows services, or standalone applications.
Which two choices are available when specifying an application in a URL string for the Health Rule REST API? (Choose two.)
The Health Rule REST API allows you to create, configure, update, and delete health rules for multiple applications simultaneously. To use this API, you need to specify the application in the URL string. You can use either the application ID or the application name for this purpose. The application ID is a unique numeric identifier for each application in the Controller. The application name is the display name of the application in the AppDynamics UI. You cannot use the application alias, GUID, or REGEX for the Health Rule REST API.Reference:Health Rule APIandRetrieve All Business Applicationsin the AppDynamics documentation.
What are two recommendations for servers in an Events Service Cluster? (Choose two.)
According to the Cisco AppDynamics Professional Implementer (CAPI) documents, the two recommendations for servers in an Events Service Cluster are:
Should be on the same local network : This is a valid recommendation because the Events Service Cluster is based on Apache Cassandra, which is a distributed database that relies on network communication between the nodes. Having the servers on the same local network reduces the network latency and improves the performance and reliability of the cluster.The network bandwidth should be at least 1 Gbps, and the network firewall should allow the required ports for the Events Service Cluster12.
Should have identical hardware specifications (D): This is a valid recommendation because the Events Service Cluster is horizontally scalable, which means that the nodes share the data storage and processing load equally. Having identical hardware specifications for the servers ensures that the cluster is balanced and efficient, and avoids performance bottlenecks or failures due to hardware differences.The hardware specifications should meet the minimum requirements for the Events Service Cluster, such as CPU cores, RAM, disk space, and disk type12.
The incorrect options are:
Should be installed using the same user account (A): This is not a valid recommendation because the Events Service Cluster does not require the same user account for installation. The user account that is used to install the Events Service Cluster should have sudo privileges on the target hosts, but it does not have to be the same for all the hosts.The user account that is used to run the Events Service Cluster should have read and write permissions on the installation directory, but it does not have to be the same for all the hosts either12.
Should have eight or more CPU cores (B): This is not a valid recommendation because the Events Service Cluster does not require eight or more CPU cores for the servers. The minimum requirement for the CPU cores is four, and the recommended requirement is six.Having more CPU cores may improve the performance of the cluster, but it is not a mandatory recommendation12.
Should be running the same operating system version (E): This is not a valid recommendation because the Events Service Cluster does not require the same operating system version for the servers. The Events Service Cluster supports various Linux operating systems, such as CentOS, Red Hat, Ubuntu, and SUSE.The operating system version should be compatible with the Events Service version, but it does not have to be the same for all the hosts12.
1: Events Service Requirements - AppDynamics
2: Events Service Deployment - AppDynamics
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