Sun Storage 5210 NAS Appliance
 
Sun Storage 5220 NAS Appliance
 
Sun Storage 5310 NAS Appliance
 
Sun Storage 5320 NAS Gateway/Cluster System
 
Sun Storage 5320 NAS Appliance
 
Sun Storage 5310 NAS Gateway System
 

GCS>Sun Microsystems>Storage - Disk>Network Attached Storage
 

Symptoms:

• Performance issues

Purpose/scope:
Observing guidelines for free space and the number of files per directory on the NAS can significantly enhance performance and usability.
The NAS OS performs best when an ample amount of free disk space can be maintained, and also when the number of files per 
directory can be managed, and this document outlines these guidelines.

• No more then 70% disk space used per volume.
• No more than 10K files per directory.

If there is a requirement to use directories with larger numbers of files, consider locating these directories somewhere other than the shared or mounted directory. This ensures that the directories are read only when necessary, reducing system load.

Failure to follow these guidelines can result in poor performance or worse. In extreme cases where both of these are exceeded by a large margin, for example 100K files in a directory combined with 5% free space, it is possible to experience more severe problems, up to and including timeouts and/or extremely slow response times resembling a hang condition.

Note that the above recommendations should be considered guidelines. Actual thresholds may vary depending on many other factors, such as number of active connections and system load.

Also note that scheduled checkpoints will stop when a disk volume reaches 90% full, and some, but not all scheduled checkpoints will be deleted when a volume reaches 95% full.

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