Answer / jsdkar

nfs 2 default 8kb transfer rate,it did not check the
authentication at the time connection.client wants to access
unauthorized file it shows error messages like "write
error","read error"
nfs 3 32kb transfer rate. It check at the time
connection.ACL Support

Answer / kesava

NFS Version 2 is documented in RFC 1094 and was published in
March 1989. NFS Version 3 is documented in RFC 1813 and was
published in June 1995.


The major differences between the NFS versions 2 and 3 are:

* Version 2 of the NFS protocol limited file offsets to
a 32-bit quantity, which limited the size of files
accessible by clients to 4.2 GB. For users who regularly
gain access to larger files, this was a severe limitation.
NFS version 3 extended the file offsets and a number of
other fields to 64-bits.
* NFS Version 2 limited the data transfer size to 8 KB.
No single read or write request could exceed 8 KB. This
limits performance on high-bandwidth networks because it
artificially increases the number of NFS requests to
transfer a given amount of data. NFS version 3 removed that
limitation and allows the client and server to negotiate a
maximum transfer size.
* Version 2 NFS servers must commit data written by a
client to stable storage (a disk or NVRAM) before responding
affirmatively to the client.
* NFS version 3 provides a new COMMIT operation that
allows a client to perform unstable writes to a server
followed by a COMMIT request. The server is required to
verify that client data is on stable storage only when it
receives the COMMIT operation. A mechanism is provided that
allows the client to detect server loss of uncommitted data
and recover.

What is /etc/system for?

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