[AccessD] Replication - A2K

John W. Colby jcolby at ColbyConsulting.com
Thu Mar 27 20:37:54 CST 2003


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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