Print-friendly Version

Tunables for the Sun StorEdge SAN Foundation Suite: Optimizing for Performance and Failover

Chris Wood, Sajid Zia, and Dennis Kleppen; June 2007

Introduction

This article describes various tunables for Sun StorEdge SAN Foundation Suite (also known as Leadville) software, specifically for failover optimization and performance.

The paper presents three general matrices describing the various types of tunables and/or default values related to performance, failover times, and error recovery and logging. Type one (1) variables may be adjusted to fit specific customer configuration requirements. Type two (2) variables are adjustable, but in general no adjustment is recommended: These variables need to be tuned only in very rare cases. Type three (3) variables are hard-coded and are not adjustable; they are presented herein for completeness only.

Additionally, two additional, device-specific matrices are supplied that cover the Sun StorEdge T3/6x20, the Sun StorEdge 99x0 and the Sun StorEdge 3510 systems. There are, in some cases, different, device-specific Type 1 and Type 2 values used in the driver stack based on the driver issuing a SCSI Inquiry command and identifying a specific type of device. These are identified in the device-specific matrix section.

For more details, see the list of contents below.

Download the document as PDF.

For more information, please see the Storage Administration hub on the BigAdmin System Administration Portal: http://www.sun.com/bigadmin/hubs/storage/

Contents

• Introduction
• Matrix Type 1 (User-Adjustable)
  • Dependencies and Interrelationships
  • Approximate Time to I/O Failure
  • Generic Example
    • Approximate Time to I/O Failure
  • Sun StorEdge T3/6x20/99xx Type Devices
    • Approximate Time to I/O Failure
  • Sun StorEdge 351x Type Devices
    • Approximate Time to I/O Failure
• Matrix Type 2 (Adjustment Not Recommended)
• Matrix Type 3 (Not Adjustable - Information Only)
• Summary and Conclusion

Unless otherwise licensed, code in all technical manuals herein (including articles, FAQs, samples) is provided under this License.