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RE: Network Drive Support ?

From: Loritsch, Berin <bloritsch_at_dtri.net>
Date: Tue, 26 Oct 2010 09:07:21 -0400

> From: Phil Pinkerton [mailto:pcpinkerton_at_gmail.com]
>
> Question from a client:
>
> Does Subversion support checking out to a "network drive"
> many miles away ?
>
> They are asking due to extremely slow checkouts across a WAN
> to a NAS drive. I need a technical answer with regards to the
> performance of subversion in this scenario. ( as if speaking
> to a 10 year old ...mgmt haha )

Think of it this way. Any network activity is much slower than a local
drive. A checkout _to_ a remote drive will have many network accesses
for each temp file creation and deletion. With the current local copy
format for SVN, that is at least two network accesses for each changed
file. That is why the preferred best practice is to host the code on a
server and check out from the remote machine directly. The
client/server interactions have been optimized. To have a machine check
out files to a remote drive will cause all sorts of network activity as
that machine negotiates with the server and the remote drive. In
Windows operating systems, networked drives are painfully slow when
dealing with many small files. There are several network interactions
for each file that is created/read/modified on a remote drive--including
DNS lookup, network authentication, checksum validations, etc.

Is this enough to get you started?

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Received on 2010-10-26 15:08:01 CEST

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