locking /concurrency control

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 what exactly is the locking /concurrency control mechanism used in
NFS to prevent simultaneous  updates in NFS ?

Re: locking /concurrency control

aarklon@gmail.com wrote:
Quoted text here. Click to load it

"man nfs" would show you:

"The Network Lock Manager protocol is a separate sideband protocol used
to  manage  file locks in NFS version 2 and version 3.  To support
lock recovery after a client or server reboot, a second sideband
protocol -- known  as  the Network Status Manager protocol -- is also
In NFS version 4, file locking is supported directly in the main NFS  
protocol, and the NLM and NSM sideband protocols are not used."

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