[Zope] ZSyncer

Sophia Grimm sophiagrimm at yahoo.com
Thu Sep 18 16:19:18 EDT 2003


Thanks to all who responded (Dennis, Dieter, Paul).
I'm going to work on getting my system clocks in sync,
as this sounds like a reasonable explanation.


--- Paul Winkler <pw_lists at slinkp.com> wrote:
> On Thu, Sep 18, 2003 at 08:23:28AM -0700, Sophia
> Grimm wrote:
> > When I synchronize using ZSyncer, very frequently
> the
> > indicator text beside the folder still shows as
> "out
> > of date" even though it is not (the date and
> content
> > are correct). Is this typical? And what can I do?
> > Because this happens, I am syncing a lot of
> folders
> > that probably don't need it.
> 
> This is a known limitation. It happens when the
> source
> system's clock is a bit (or a lot) ahead of the
> destination.
> So you modify something and immediately sync it and
> the destination
> modification time is returned as older than you
> think.
> 
> To prevent it in the future, ensure that the source
> and
> destination servers have their clocks set as close
> as
> possible.
> However, this won't help with existing objects.
> 
> Current CVS of zsyncer tries uses DublinCore
> timestamps
> instead of bobobase_modification_time, when
> possible.
> This gives better results for CMF content.
> 
> Unfortunately, it's hard to do better for most other
> zope
> types, because they only provide
> bobobase_modification_time, which is
> under control of the underlying ZODB and cannot be
> overridden by zope.
> 
> There are plans to investigate checksumming and
> other strategies
> for more reliably determining sync status, but
> currently I don't
> have much time for this.
> 
> -- 
> 
> Paul Winkler
> http://www.slinkp.com
> Look! Up in the sky! It's RASPUTINIC SCHIZOID
> MEGABOT!
> (random hero from isometric.spaceninja.com)
> 
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