RE: Subversion Windows Performance compared to Linux

Latency Numbers Every Programmer Should Know:

https://gist.github.com/jboner/2841832

Always useful to have in mind when considering your benchmarking environment.

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> -----Original Message-----
> From: Nico Kadel-Garcia [mailto:nkadel_at_gmail.com]
> Sent: 23 April 2014 06:21
> To: Mark Phippard
> Cc: Florian Ludwig; users_at_subversion.apache.org
> Subject: Re: Subversion Windows Performance compared to Linux
> 
> On Tue, Apr 22, 2014 at 9:53 AM, Mark Phippard <markphip_at_gmail.com> wrote:
> > On Wed, Apr 16, 2014 at 1:13 PM, Florian Ludwig
> <vierzigundzwei_at_gmail.com>
> > wrote:
> >
> >>
> >> this topic was raised several times in the past - the answers range
> from
> >> "will be better/solved in the next version 1.7" or "it is due to ntfs
> vs
> >> ext3/4" or it's the AV, network setup or the Windows file indexing
> service.
> >> After disabling all those and running a test checkout on Linux and
> Windows
> >> on the same machine I still get a result of Linux being 7.3x times
> faster.
> >> Any ideas why?
> >
> >
> > There are probably some good discussions about this in the archives
> during
> > the run-up to 1.7 but my memories are fading.  I do not think anyone
> ever
> > said that the difference would be "solved" but more that the
> architectural
> > changes in 1.7 were going to close the performance gap on Windows when
> > compared to SVN 1.5/1.6 on Linux.  There were a couple of big
> performance
> > fixes backported to some the later 1.6.x releases so the "win" in 1.7 is
> not
> > as great when compared with 1.6.latest as it is with 1.6.0.
> 
> I remember this. The deadly operation was the initial checkout on
> network based file systems, especially CIFS on the Windows boxes. The
> few servers that ran NFS acted much more like Linux hosts, or like
> Linux hosts usin gNFS. A number of changes in Subversion, over time,
> reduced the perfidious chattiness that hampered CIFS baed checkouts,
> and all Windows users with network mounted working copies became
> *much* happier.
> 
> Let's do be careful to draw distinctions between local file systems,
> like NTFS and ext4, and network file systems like CIFS and NFS. I'm
> afraid it's common to handwave those away as not making a difference,
> and they really do.
> 
>                     Nico Kadel-Garcia
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