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Performance Tuning and Filesystems for Linux

Initiators

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The iontuner utility does performance tuning for Linux-based initiators used with ION Accelerator.

It is available for download at http://www.fusionio.com/files/ion-optimization-scripts

Here are a few of its features:

• Balances an initiator's interface IRQ load between CPUs and NUMA nodes

• Tunes block device parameters for ION block devices

• Warns the user of power settings that may negatively impact performance

• Supports RHEL6.x/OL6.x and SLES11

• Has been tested on the Intel Nehalem / Westmere and Intel Sandy Bridge / Ivy Bridge

architectures

INSTALLATION

To install iontuner.rpm , run the following commands:

rpm -ivh iontuner*.rpm

reboot

When upgrading from releases prior to 1.1.0, remove the old package and install the new one,

rather than upgrading (use

rpm -e, rpm -i rather than rpm –U).

PERFORMANCE EXPECTATIONS

iontuner improves performance only when the bottleneck is initiator storage performance.

Configurations that are application-limited, fabric-limited, or target-limited will see little benefit from

iontuner.

iontuner is primarily aimed at improving performance on NUMA initiators, but it can improve

performance on any Linux initiator. The impact of

iontuner will scale with the number of NUMA

nodes in the initiator system.

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Dell Acceleration Appliances for Databases Manual de usuario Pagina 64