User`s guide

12
NFS
• NFS Version 3 Client Update
The overall behavior of the NFS Version 3 client has been modified to
improve mixed and heavy load performance. Most casual users of
NFS will probably notice little change. However, users should see a
marked improvement in performance under the following
conditions:
– Running applications that write large amounts of data over NFS
– Heavy use of bi-directional NFS I/O
– Mixed heavy local disk and NFS I/O
To improve performance under heavy loads, a new set of behaviors
have been added that perform the following actions:
– Enable full-duplex NFS traffic
– Prevent read and write starvations
– Provide resource limiting to make the NFS client a fairer user of
system resources
These behaviors are based on the notion of fair scheduling of
asynchronous NFS I/O to prevent starvations and provide more
efficient use of network bandwidth and server disk resources. This
also extends to prevent starvations between different NFS mounted
directories.