Fred,

If that is the case, then how do other IB/FB installations provide some type
of fail-over redundancy? Replication seems to be the only other
alternative, and with that scenario there would seem to need to be two
roughly comparable IB/FB servers sitting side-by-side, which seems like a
very expensive option...

Best Regards,

David Montgomery
montgomery@...

> -----Original Message-----
> From: Wilson, Fred [mailto:Fred.Wilson@...]
> Sent: Tuesday, January 15, 2002 12:13 PM
> To: 'ib-support@yahoogroups.com'
> Subject: RE: [ib-support] Firebird and Network Attached Storage?
>
>
> I would say that probably no one is using networked drives as FB (nor will
> IB) open a database file on a networked drive. One would have to
> re-compile
> the source to remove that check.
>
> Best regards,
> Fred Wilson
> SE, Bell & Howell
> fred.wilson@...
> <mailto:fred.wilson@...>
>
>
> -----Original Message-----
> From: David Montgomery [mailto:montgomery_list@...]
> Sent: Tuesday, January 15, 2002 1:14 PM
> To: ib-support@yahoogroups.com
> Subject: RE: [ib-support] Firebird and Network Attached Storage?
>
>
> John,
>
> Thanks for the response. So you're saying very few active IB/FB
> installations are using networked drives (via NFS, Samba,
> whatever) because
> of this potential corruption?
>
> We do use forced writes at present (I don't have any desire to change
> this...I don't think).
>
> For some metrics on how much disk activity we're currently pushing, I just
> set up the Win2000 performance monitor for "Disk Read Bytes/sec", "Disk
> Write Bytes/sec", and "Disc Bytes/sec". These seem like the best metrics
> available for this purpose. Once I have some idea of how much data we're
> talking about, I'll let you know.
>
> Best Regards,
>
> David Montgomery
> montgomery@...
>
> > -----Original Message-----
> > From: John Bellardo [mailto:bellardo@...]
> > Sent: Tuesday, January 15, 2002 10:40 AM
> > To: ib-support@yahoogroups.com
> > Subject: Re: [ib-support] Firebird and Network Attached Storage?
> >
> >
> > David,
> >
> > On Tuesday, January 15, 2002, at 09:57 AM, David Montgomery wrote:
> >
> > > Hi,
> > >
> > > [...]
> > > Does anyone care to comment on this potential network design?
> I'm a bit
> > > leary of sucking all that data through even a large ethernet
> pipe. Will
> > > having the disks in a different box really kill performance?
> >
> > To answer your question, it depends on the activity level of your
> > database. Do you have any numbers that tell you how much data you are
> > currently pushing through your existing SCSI controller? Are you
> > planning on using forces writes? If not there is a higher change of
> > database corruption when one of the servers crashes.
> >
> > The other problem is FB/IB does a check to see if the database file is
> > on a network drive, and if it is it won't allow you to open it. This
> > protects the database from corruption, because if different servers on
> > different machines open the same database file at the same time it will
> > get corrupted. If you really want to do this (maybe just for testing
> > purposes) I can tell you what you need to change in the source to
> > disable the check. But disabling it will give you more than enough rope
> > to hang yourself.
> >
> > -John
> >
> >
> >
> > To unsubscribe from this group, send an email to:
> > ib-support-unsubscribe@egroups.com
> >
> >
> >
> > Your use of Yahoo! Groups is subject to

http://docs.yahoo.com/info/terms/
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>
>

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