Promise Technology E610f Bedienungsanleitung PDF herunterladen (Seite 12)

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Best Practices Guide 11

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Configuring LUN Mapping

Once LUN Mapping is enabled, it can be configured per logical drive and per initiator, in other words, on a per VTL

appliance basis. To assign a logical drive to a VTL appliance, create a LUN map between the logical drive and the Fibre

Channel initiator ports on the VTL appliance.

For detailed instructions on how to configure LUN Mapping, please refer to the VTrak E610f Product Manual.

Assign VTL Tape to VTL Clients

A SAN topology is typically used to connect VTL appliances and VTL clients, where backup software has been installed.

Access control is required to configure which client has access to which VTL appliance and, more specifically, to which

VTL tape on the appliance.

Similar to assigning storage to VTL, the FalconStor VTL solution also offers a way to assign VTL tape devices to VTL

clients, similar to LUN Mapping on the VTrak E610f. For detailed instructions on how to assign VTL Tape to VTL clients,

please refer to the FalconStor VTL User Manual.

Tuning the Performance

This section lists tips for fine-tuning the VTrak E610f for optimal performance with the FalconStor VTL solution.

Distributing I/O Load among Subsystems

You can determine the I/O load on each subsystem through the real-time performance monitoring function in Promise

WebPAM PROe software. Promise WebPAM PROe software is a web-based graphical user interface embedded inside

each VTrak E610f. To access the graphical user interface, launch your Internet browser and type in the IP address of the

Management port; you will be connected to the Promise WebPAM PROe software login screen.

Through the performance monitoring function, you can see the I/O load of each subsystem and can determine whether

the loads are evenly distributed. If the loads are not evenly distributed, you can adjust the access control between the VTL

clients and the access control between the VTL and the VTrak E610f to balance the I/O load.

Please refer to the section in this best practices guide on Setting up Access Control for more details about how to

configure access control.

Distributing I/O Load on Logical Drives

Through the WebPAM PROe performance monitoring function, you can also find out whether the I/O load is evenly

distributed among the logical drives. If the load is not evenly distributed, you may adjust the access control between the

VTL and the logical drives of the VTrak E610f to balance the I/O load.

Please refer to the section in this best practices guide on Setting up Access Control for more details about how to

configure access control.

Distributing I/O Load on Fibre Channel Ports

You can use the performance monitoring function to find out whether the I/O load on the Fibre Channel ports connected

to the VTL is evenly distributed. If the load is not distributed evenly, you may change the preferred path to the logical

drives through the FalconStor VTL management console.

Please refer to the FalconStor VTL User Manual for detailed instructions on how to change the preferred path to the

logical drives from the storage subsystem.

Identifying and Removing Slow Drives

Not all SATA drives are equal. Some drives perform significantly slower than others, in term of response time and latency.

Any slow drive brings down the overall VTL solution performance. Therefore, Promise recommends stress testing the

drives during a pre-production test, then identifying and removing the slow drives before you deploy the solution

to the production environment.

You may also find out whether there are any slow drives using the WebPAM PROe performance monitoring function. The

WebPAM PROe real-time performance monitoring function is available in VTrak E610f firmware version 3.33.0000.00 and

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