On Thu, 29 Jun 2000 17:19:32 -0400, Shane Hathaway
<[EMAIL PROTECTED]> wrote:
>Quite simply, Data.fs is appended, not modified, except during a pack
>operation. Think of it like a binary log file. Therefore there are
>only two ways a simple, live backup of Data.fs can fail:
>
>1) You do the cop
On Thu, 29 Jun 2000, Wilkinson Charlie E wrote:
> This would be consistent with "atomic updates." What it means is
> that a transaction is not written to the Data.fs file until it has
> completed, and when it is finally written out, it's done as an
> atomic operation, i.e. at the system level it
Title: RE: [Zope] Backing Up Zope (was: Re: [Zope] Data.fs.lock?)
> -Original Message-
> From: Erik Enge [mailto:[EMAIL PROTECTED]]
>
> On Thu, 29 Jun 2000, Jeff K. Hoffman wrote:
>
> > It is my understanding that the ZODB on disk is always in a
> consistent
"Jeff K. Hoffman" wrote:
>
> On Thu, 29 Jun 2000, Erik Enge wrote:
>
> > On Thu, 29 Jun 2000, Jeff K. Hoffman wrote:
> >
> > > It is my understanding that the ZODB on disk is always in a consistent
> > > state; Jim has said, in the past, that you can simply make a copy of
> > > Data.fs, even whi
On Thu, 29 Jun 2000, Erik Enge wrote:
> On Thu, 29 Jun 2000, Jeff K. Hoffman wrote:
>
> > It is my understanding that the ZODB on disk is always in a consistent
> > state; Jim has said, in the past, that you can simply make a copy of
> > Data.fs, even while Zope is running, without problems.
>
> Wilkinson Charlie E wrote:
>
> Just to start by pointing out the bloody obvious:
>
> - Restoring from backup means you lose all data between
> backup date/time and system failure. Sucks, but it
> beats losing *all* your data. (RAID5 anyone?)
A) Please: no html!
B) I just had one weird
On Thu, 29 Jun 2000, Jeff K. Hoffman wrote:
> It is my understanding that the ZODB on disk is always in a consistent
> state; Jim has said, in the past, that you can simply make a copy of
> Data.fs, even while Zope is running, without problems.
But the Data.fs has to be updated sometimes. And i
On Thu, 29 Jun 2000, Wilkinson Charlie E wrote:
> Another random thought is that if ZODB transactions and
> writes are atomic, than none of this should be an issue.
> Anyone know the answer to that one?
It is my understanding that the ZODB on disk is always in a consistent
state; Jim has said, i
Title: RE: [Zope] Backing Up Zope (was: Re: [Zope] Data.fs.lock?)
Just to start by pointing out the bloody obvious:
- Restoring from backup means you lose all data between
backup date/time and system failure. Sucks, but it
beats losing *all* your data. (RAID5 anyone?)
- With that in
