HPE StoreOnce VTL Workload Test

VTL targets appear to the backup application as physically connected tape devices, with backup and recovery jobs managed in the same manner as with a physical tape device. These Virtual Tape Libraries enable administrators to more efficiently manage resources. However, if one/more Virtual Tape Libraries experience a processing bottleneck, I/O requests could not be processed quickly, thereby causing prolonged delays in data access for users. Administrators hence have to continuously track the I/O processing speed of the Virtual Tape Libraries, so that probable processing delays can be detected proactively and pre-emptively treated. The HPE StoreOnce VTL Workload test helps administrators with this.

This test monitors the overall performance of the Virtual Tape Libraries on the target HPE StoreOnce Backup system, by reporting the I/O processing capability of the VTLs. This test helps administrators in identifying processing bottlenecks (if any), so that the bottleneck is cleared before users complain of slowdowns. This test also reveals the files and directories that can be concurrently opened on the VTLs.

Target of the test : HPE StoreOnce Backup system

Agent deploying the test : A remote agent

Outputs of the test : One set of results for the target HPE StoreOnce Backup system being monitored

Configurable parameters for the test

Parameters	Description
Test Period	How often should the test be executed.
Host	The host for which the test is to be configured.
Port	The port at which the host is listening. By default, this is set to Null.
Username and Password	By default, the eG agent executes REST APIs on the target HPE StoreOnce Backup system to collect the required metrics. For the eG agent to execute the REST APIs, a special user with user role is required. Specify the credentials of such a user in the Username and Password text boxes.
Confirm Password	Confirm the password by retypying it here.
Timeout Seconds	Specify the duration (in seconds) beyond which the test will timeout in this text box. The default value is 120 seconds.
Service Set	A service set is a collection of services such as Virtual Tape Library(VTL), Network Attached Storage(NAS), Replication and StoreOnce Catalyst. There is one instance of each service per service set. By default, the target HPE StoreOnce Backup system is associated with a service set. Therefore, the Service Set parameter is set to 1 by default. If you are monitoring multiple HPE Storeonce Backup systems in your environment, then, specify the exact number associated with the service set that is assigned to each HPE StoreOnce Backup system that is to be monitored.

Measurements made by the test

Measurement	Description	Measurement Unit	Interpretation
Average read throughput	Indicates the rate at which data was read from the Virtual Tape Libraries.	MB/Sec	A consistent drop in this value could indicate a gradual dip in the rate at which read requests are processed.
Average write throughput	Indicates the rate at which data was written to the Virtual Tape Libraries.	MB/Sec	A consistent drop in this value could indicate a gradual dip in the rate at which write requests are processed.
Average concurrent open FDs	Indicates the average number of files and directories that can be concurrently opened.	Number