General performance tips - Veritas Storage Foundation for Windows

book

Article ID: 100006838

calendar_today

Updated On:

Resolution

1. Track alignment - Make sure that the volumes are track aligned. The proper track alignment is determined by the disk array vendor. This is very important for performance. You can check the track alignment settings from the VEA control panel. The proper track alignment is determined by the disk array vendor.

2. RAID contention - Ensure that either hardware or software (but not both) RAID configurations are in place for any volume. We don't recommend using both hardware and software RAID for the same disks. This may cause contention between the two configurations and actually reduce performance. Normally, software RAID is used for JBODs (Just a Bunch of Disks) without any RAID capabilities.

3. Multipathing settings (Least Queue Depth) – Sometimes switching the multipathing mode to “Least Queue Depth” will improve performance over the default "Round Robin" mode.

4. File allocation unit size – Some applications recommend specific file allocation unit sizes. For example, Microsoft has sometimes recommended a 64K file allocation unit size for SQL databases (this is just an example, check with the vendor to confirm any specifics). The default for NTFS is 4K, which may not be optimal for some applications. Unfortunately, this is something that must be set at the time that the volume is formatted. To change this, the volume must be reformatted.

5. Storport driver – Make sure your storport.sys drive is not out of date. This affects multipathing performance.
 


Issue/Introduction

Here are a few items to check when troubleshooting performance issues.