Date: Sat, 16 Mar 2013 21:56:04 -0700 From: Mehmet Erol Sanliturk <m.e.sanliturk@gmail.com> To: FreeBSD Questions Mailing List <freebsd-questions@freebsd.org> Subject: Re: NFS Performance: Weirder And Weirder Message-ID: <CAOgwaMsH4iZRKLUT2Zh_dHHmEgFCmRa7mhkA2k0_8cgJ194cUg@mail.gmail.com>
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There is one more point to check : >From your mount information , in the server , directories are on DIFFERENT drives . Assume one of the drives is very "INTELLIGENT" to save power . During local reading , due to reading speed , it may not go to "SLEEP" , but during network access , it may go to sleep due to its exceeded waiting time . If this is the case , please stay away from INTELLIGENT drives in a server : These are designed and produced by very IGNORANT entities . For simple , personal applications , their latency may not be noticed very much , but in a server , they can not be used . Another point may be file sizes . To check effect of file size , into the two different directories copy a large ( for example , 5 GB , or a 4.n GB .iso file ) and transmit these same files from their directories to a single client . If directory structure makes a difference , assuming hardware parts and client does not behave differently to these files , performance difference may be attributed to server side . Mehmet Erol Sanliturk
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