Benchmarking NFSv3 vs. NFSv4 file operation performance

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Benchmarking NFSv3 vs. NFSv4 file operation performance

Fri, 20 Jun 2008 08:00:00 GMT
NFS version 4, published in April 2003, introduced stateful client-server interaction and "file delegation," which allows a client to gain temporary exclusive access to a file on a server. NFSv4 brings security improvements such as RPCSEC_GSS, the ability to send multiple operations to the server at once, new file attributes, replication, client side caching, and improved file locking. Although there are a number of improvements in NFSv4 over previous versions, this article investigates just one of them -- performance.

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LEARN ABOUT CENTOS

rpc.idmapd

RPC.IDMAPD(8)						    BSD System Manager's Manual 					     RPC.IDMAPD(8)

NAME

     rpc.idmapd -- NFSv4 ID <-> Name Mapper

SYNOPSIS

     rpc.idmapd [-v] [-f] [-p path] [-c path]

DESCRIPTION

     rpc.idmapd is the NFSv4 ID <-> name mapping daemon.  It provides functionality to the NFSv4 kernel client and server, to which it communi-
     cates via upcalls, by translating user and group IDs to names, and vice versa.

     The options are as follows:

     -v 	  Increases the verbosity level (can be specified multiple times).

     -f 	  Runs rpc.idmapd in the foreground and prints all output to the terminal.

     -p path	  Specifies the location of the RPC pipefs to be path.	The default value is "/var/lib/nfs/rpc_pipefs".

     -c path	  Use configuration file path.

     -C 	  Client-only: perform no idmapping for any NFS server, even if one is detected.

     -S 	  Server-only: perform no idmapping for any NFS client, even if one is detected.

EXAMPLES

     rpc.idmapd -f -vvv

     Runs rpc.idmapd printing all messages to console, and with a verbosity level of 3.

FILES

     /etc/idmapd.conf

SEE ALSO

     idmapd.conf(5)

AUTHORS

     The rpc.idmapd software has been developed by Marius Aamodt Eriksen <marius@citi.umich.edu>.

BSD
								 February 3, 2003							       BSD

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