NFS small files

[Peter Hessler]

I should mention that copying the same directory on the nfs server takes
15s, rather than the 54s over nfs.

On Tue, 8 Mar 2005 17:46:31 -0800
Peter Hessler <phessler at coverity.com> wrote:

: These files are sitting right next to each other on disk, I created
them
: at the same time: """for i in `jot 10000`; do dd if=/dev/random of=$i
: bs=128 count=128; done""".  Then I timed the copy of that directory.
: 
: Does seek really cause an 11x performance penalty?
: 
: On Tue, 08 Mar 2005 17:40:44 -0800
: Peter Kieser <pfak at telus.net> wrote:
: 
: : Copying single files are always going to take longer, because the
: drive 
: : has to seek more thus latency is introduced.
: : 
: : --Peter
: : 
: : Peter Hessler wrote:
: : 
: : >I'm setting up an NFS server to be used for compiling, and it seems
: that
: : >while speeds are acceptable for large files, small files take much
: : >longer than expected.
: : >
: : >Copying 10000 16K files (in a directory) takes 54seconds, while
: copying
: : >a 170M single file takes 5s.
: : >
: : >Are there any tricks for speeding up small file performance?  I'm
: : >willing to give up large file performance.
: : >
: : >/etc/sysctl.conf:
: : > vfs.vmiodirenable=1
: : > kern.ipc.somaxconn=2048
: : > kern.maxfiles=65536
: : > net.isr.enable=1
: : >
: : >/boot/loader.conf:
: : > kern.ipc.nmbclusters=32768
: : >
: : >Kernel Conf:
: : > include GENERIC
: : > ident NFS
: : > options DEVICE_POLLING
: : > options HZ=1000
: : >_______________________________________________
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: : >http://lists.freebsd.org/mailman/listinfo/freebsd-performance
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: : >
: : >  
: : >
: : 
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