[mythtv-users] Dual PVR250s + NFS = dropped frames
Michael T. Dean
mtdean at thirdcontact.com
Wed Jul 28 14:06:17 EDT 2004
Matt Perry wrote:
>I increased the NFS block size to 64k
>
>
I'm pretty sure your server/client are still using 8KB (NFSv2 or NFSv3
on Linux 2.4.x) or possibly 32KB (Linux 2.6.x or Linux 2.4.x with NFS
over TCP/IP) block sizes (unless you've modified your kernel source and
recompiled the kernel). The server's maximum block size is defined by
the kernel constant NFSSVC_MAXBLKSIZE in the file
include/linux/nfsd/const.h in your Linux kernel source directory. Even
if you specify a larger size (for a client that can support larger
sizes), the server will use the kernel's maximum allowed NFS block size.
And, finally, if using a different OS that supports larger block sizes
for your server, Linux NFS clients support a maximum of 32KB block
sizes. (See http://www.tldp.org/HOWTO/NFS-HOWTO/performance.html )
Mike
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