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List: unison-users
Subject: Re: [unison-users] copying to USB harddrive or flash drive slow under windows
From: "Ryan Krauss" <ryanlists () gmail ! com>
Date: 2006-12-13 14:14:36
Message-ID: c5b438120612130614i54d610b8x3130b2f72ee9c4a5 () mail ! gmail ! com
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I am seeing these speed differences even when creating new files. It
is much faster to create new files USB to internal than the other way
around.
On 12/13/06, Kai Steinbach <kai@steinbach.com> wrote:
> Hi Ryan,
>
> On 12/13/06, Ryan Krauss <ryanlists@gmail.com> wrote:
> [snip]
> > doing something wrong? Are there settings I can change? Does anyone
> > else using windows see there kinds of things?
>
> I would suggest reading through the ml archives on what kind of speeds
> other people have achieved.
>
> From my own setup I can testify that the initial copying of a new file
> from A to B is slow. Really slow. Dead slow ...
>
> But it all pays out later due to the excellent sync features. Example:
> I sync a folder with 50GB of some 15000 files with different sizes and
> content - crossplatform between a windows and a mac through SSL.
> Unison manages updates on both sides (A to B, B to A). Now it comes: A
> few days back I had over 2000 files updated - but each only with a few
> kbytes changed. Unison (with fastcheck) picked the changes up and
> synced ONLY THE CHANGES so quickly - I can't imagine doing a full copy
> of the whole files in anything 10 times as long. Next time I'll try to
> take the time and estimate the data volumes - there must be a huge gap
> between what changes unison sends and what it *would* be if I had to
> re-copy the whole files.
>
> I guess for you that means you'll need to figure out if unison is the
> right tool for what you are trying to do. Maybe a combined strategy of
> copying files outside of unison followed by a unison sync will be a
> good way forward?
>
> Kai
>
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<p>I am seeing these speed differences even when creating new files. \
It<br> is much faster to create new files USB to internal than the other way<br>
around.<br>
<br>
On 12/13/06, Kai Steinbach <<a \
href="mailto:kai%40steinbach.com">kai@steinbach.<wbr>com</a>> wrote:<br> > Hi \
Ryan,<br> ><br>
> On 12/13/06, Ryan Krauss <<a \
href="mailto:ryanlists%40gmail.com">ryanlists@gmail.<wbr>com</a>> wrote:<br> > \
[snip]<br> > > doing something wrong? Are there settings I can change? Does \
anyone<br> > > else using windows see there kinds of things?<br>
><br>
> I would suggest reading through the ml archives on what kind of speeds<br>
> other people have achieved.<br>
><br>
> From my own setup I can testify that the initial copying of a new file<br>
> from A to B is slow. Really slow. Dead slow ...<br>
><br>
> But it all pays out later due to the excellent sync features. Example:<br>
> I sync a folder with 50GB of some 15000 files with different sizes and<br>
> content - crossplatform between a windows and a mac through SSL.<br>
> Unison manages updates on both sides (A to B, B to A). Now it comes: A<br>
> few days back I had over 2000 files updated - but each only with a few<br>
> kbytes changed. Unison (with fastcheck) picked the changes up and<br>
> synced ONLY THE CHANGES so quickly - I can't imagine doing a full copy<br>
> of the whole files in anything 10 times as long. Next time I'll try to<br>
> take the time and estimate the data volumes - there must be a huge gap<br>
> between what changes unison sends and what it *would* be if I had to<br>
> re-copy the whole files.<br>
><br>
> I guess for you that means you'll need to figure out if unison is the<br>
> right tool for what you are trying to do. Maybe a combined strategy of<br>
> copying files outside of unison followed by a unison sync will be a<br>
> good way forward?<br>
><br>
> Kai<br>
><br>
</p>
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