[AccessD] Replication - A2K

John W. Colby jcolby at ColbyConsulting.com
Fri Mar 28 07:26:18 CST 2003


Thanks.

John W. Colby
Colby Consulting
www.ColbyConsulting.com

-----Original Message-----
From: accessd-bounces at databaseadvisors.com
[mailto:accessd-bounces at databaseadvisors.com]On Behalf Of William
Hindman
Sent: Friday, March 28, 2003 2:24 AM
To: accessd at databaseadvisors.com
Subject: Re: [AccessD] Replication - A2K


...just a note jc ...www.trigeminal.com is loaded with replication info,
code, and tools ...HTH :)

William Hindman
"You know the world is going crazy when the best rapper is a white guy, the
best golfer is a black guy, The Swiss hold the America's Cup, France is
accusing the US of arrogance, and Germany doesn't want to go to war."

----- Original Message -----
From: "John W. Colby" <jcolby at ColbyConsulting.com>
To: <accessd at databaseadvisors.com>
Sent: Thursday, March 27, 2003 9:37 PM
Subject: RE: [AccessD] Replication - A2K


> Precisely (on both counts).  There are about 25 users of the database.
> Virtually ALL of the users are actively editing specific cases.  Each case
> can be handled by anyone, i.e. the first examiner available in the phone
> queue picks up the phone, opens the record for the person that the phone
> call is about.  In the process of taking the call, info is usually entered
> into "contact" logs, i.e. info about the phone call.  Each claimant's file
> has an assigned "Examiner" who "runs" the case.  That person has to make
> phone calls to physicians, witnesses, employers etc.  Those phone calls
also
> get data logged about them.
>
> As you can see from the description, there is not a high degree of
> concurrency where several people will be in the same case at the same
time.
> My observation of the operation is that there is a very random pattern of
> data entry since the incoming phone calls are random.  There is also a
> fairly predictive data entry since a case has to be worked, however this
> side of the operation is not necessarily data entry intensive, nor holding
> records open for long periods of time.  The Examiner calls the physician
and
> requests a doc.  Notes that fact in the log, moves on to the next claim.
>
> It seems that this type of operation would be perfect for replication, on
a
> 15 minute (or even longer) replication schedule.
>
> John W. Colby
> Colby Consulting
> www.ColbyConsulting.com
>
> -----Original Message-----
> From: accessd-bounces at databaseadvisors.com
> [mailto:accessd-bounces at databaseadvisors.com]On Behalf Of William
> Hindman
> Sent: Thursday, March 27, 2003 9:21 PM
> To: accessd at databaseadvisors.com
> Subject: Re: [AccessD] Replication - A2K
>
>
> ...if JC's clients are fairly independent of other's changes to the data,
> then replication running on a ten minute interval for instance, would
> definitely provide local speed improvements ...but independence is the
real
> question JC has to answer ...if the insurance company can function using
ten
> minute old data, then the sync updates would consume a practically
unnoticed
> amount of time compared to the effects of localized data access.
>
> ...ime most clients desire data concurrency over speed but for those that
> don't, I believe Arthur Fuller has several long posts in the archives that
> address successfully setting up and maintaining such functionality.
>
> ...of course that would mean jc'd need access to the old archives :)))))
>
> William Hindman
> "You know the world is going crazy when the best rapper is a white guy,
the
> best golfer is a black guy, The Swiss hold the America's Cup, France is
> accusing the US of arrogance, and Germany doesn't want to go to war."
>
> ----- Original Message -----
> From: "Drew Wutka" <DWUTKA at marlow.com>
> To: <accessd at databaseadvisors.com>
> Sent: Thursday, March 27, 2003 8:54 PM
> Subject: RE: [AccessD] Replication - A2K
>
>
> > True, replication wouldn't slow down the normal 'running' processes, but
> I'm
> > adding in the sync time to replicate it on every database.
> >
> > Drew
> >
> > >  -----Original Message-----
> > > From: John W. Colby [mailto:jcolby at colbyconsulting.com]
> > > Sent: Thursday, March 27, 2003 7:46 PM
> > > To: accessd at databaseadvisors.com
> > > Subject: RE: [AccessD] Replication - A2K
> > >
> > > Why would the replication slow things down?  The FE/BE running locally
> > > speeds things up by a factor of two.  Replication simply allows me to
> run
> > > the BE/FE locally on every machine.
> > >
> > > John W. Colby
> > > Colby Consulting
> > > www.ColbyConsulting.com
> > >
> > > -----Original Message-----
> > > From: accessd-bounces at databaseadvisors.com
> > > [mailto:accessd-bounces at databaseadvisors.com]On Behalf Of Drew Wutka
> > > Sent: Thursday, March 27, 2003 8:37 PM
> > > To: 'accessd at databaseadvisors.com'
> > > Subject: RE: [AccessD] Replication - A2K
> > >
> > >
> > > Just out of curiousity, what all have you tried to speed things up?
It
> > > sounds like you want to replicate a database to run 'locally' on
> > > everyone's
> > > machine.  I would be willing to be that would slow things down on it's
> > > own,
> > > even if the db is running locally.
> > >
> > > Are all of the users on a LAN, or are some accessing this through a
VPN?
> > > In
> > > that case I could see replication being used.
> > >
> > > Drew
> > >
> > > -----Original Message-----
> > > From: John W. Colby [mailto:jcolby at colbyconsulting.com]
> > > Sent: Thursday, March 27, 2003 7:24 PM
> > > To: AccessD
> > > Subject: [AccessD] Replication - A2K
> > >
> > >
> > > I need any info / experiences anyone can share re replication.  My
> > > insurance
> > > client has a functioning database now that is SLOOOOOooooow.  They
came
> > > from
> > > a "flat file" where they had basically a single table with 125+ fields
> to
> > > a
> > > fully relational FE/BE with of course much expanded functionality -
and
> of
> > > course the speed isn't anywhere close to the same as the old.  No
matter
> > > how
> > > you explain, the user doesn't know what goes on behind the scenes, and
> > > doesn't care.  All they know is that it is slower.  Plus they are
adding
> > > more employees (up to about 25 now from under 20 when I started the
> > > project - and still climbing).
> > >
> > > They will probably go to SQl Server someday but now is not the time
> > > (money).
> > > I have been discussing options with them and explained to the tech
> contact
> > > the idea behind replication.  He has been running a FE / BE
development
> > > copy
> > > of the db on his desktop and it is about twice as fast.  Therefore he
> > > thinks
> > > that replication might solve their speed issues for the short term
(for
> a
> > > year or so) until such time as they could make the move to SQL Server.
> > >
> > > So I need info.  I have done replication one time, just on my own
> system,
> > > just to see how it worked - and that was a long time ago.  So I need
to
> > > start a thread with anyone who has current experience on how to set it
> up,
> > > what is involved, any good reference material to read, would it work
to
> > > merge the BE/FE back in and also replicate design changes, etc.
> > >
> > > Anyone with info out there?
> > >
> > > Thanks,
> > >
> > > John W. Colby
> > > Colby Consulting
> > > www.ColbyConsulting.com
> > >
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>
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