Date: Sat, 29 Jan 2005 00:39:04 -0500 From: Mike Tancsa <mike@sentex.net> To: Brian Reichert <reichert@numachi.com> Cc: freebsd-current@freebsd.org Subject: Re: vfs.nfsrv.async broken ? Or pilot error ? Message-ID: <6.2.0.14.0.20050129003215.049f6dd8@64.7.153.2> In-Reply-To: <20050128224412.GK662@numachi.com> References: <6.2.0.14.0.20050128160902.050da3f0@64.7.153.2> <20050128224412.GK662@numachi.com>
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At 05:44 PM 28/01/2005, Brian Reichert wrote:
> >
> > But if I increase the size by 10 times, the process takes more than 100
> > times the amount of time to complete, and sometimes it doesnt complete at
> > all
>
>I've been trying to diagnose some big-files-over-NFS issues myself,
>with Solaris clients and a 5.3-R server.
Hi,
As long as I keep vfs.nfsrv.async=0, I can create large files no problem
[ns4-new]# time dd if=/dev/zero of=/mnt/testfile2 bs=1024k count=300
300+0 records in
300+0 records out
314572800 bytes transferred in 84.672246 secs (3715182 bytes/sec)
0.000u 0.675s 1:24.75 0.7% 23+2579k 0+38400io 0pf+0w
[ns4-new]#
Then, changing the file slightly,
[ns4-new]# time dd if=/mnt/testfile2 of=/dev/null bs=1024k
300+1 records in
300+1 records out
314573050 bytes transferred in 7.251998 secs (43377431 bytes/sec)
0.000u 0.522s 0:07.30 7.1% 28+2877k 0+0io 0pf+0w
[ns4-new]#
I can also run iozone on the nfs mount, but not with async=1
---Mike
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