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From: sxm@philabs.Philips.Com (Sandeep Mehta)
Newsgroups: comp.dcom.lans,comp.unix.wizards
Subject: Re: NFS performance: a question
Keywords: NFS, performance, read/write asymmetry
Message-ID: <3236@briar.Philips.Com>
Date: 1 Feb 88 13:18:00 GMT
References: <663@noao.UUCP>
Reply-To: sxm@briar.philips.com.UUCP (Sandeep Mehta)
Organization: Philips Laboratories, Briarcliff Manor, NY
Lines: 20

In article <663@noao.UUCP> brown@noao.arizona.edu (Mike Brown) writes:
>
>Why is the transfer rate when a process writes to a remote NFS file 3-4 times
>smaller than the transfer rate when reading a remote NFS file?
>
> ......

File reading is probably faster because of the read ahead, but when 
you write back blocks to a remote NFS, the server probably waits for
acknowlegement of a successful write, i.e. the server waits until
it receives the ack, before it trashes the cached block.

I would like to know if there is detailed answer to this.

sandeep

-- 
Sandeep Mehta					TEL : (914)-945-6478
Robotics & Flexible Automation			UUCP: uunet!philabs!sxm	
Philips Laboratories				ARPA: sxm@philabs.philips.com