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I am out of my depth

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  #1 (permalink)  
Old 28-Jul-2006, 08:41 AM
JK's Avatar JK
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I am out of my depth

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Hi All,



I am in the process of converting 5 of my databases (thanks Tom) into Front
and Back Ends when it occurs to me that that since I have to link the Back
Ends in any case, I may be able to do away with duplications of tables in
Back End sections.



The question:

Can one Front End look at more then one Back End at the same time and if so
can it cause problems in the future replication or otherwise?
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/information-technology/13865-i-am-out-of-my-depth.html



Additional info:

All of my databases looks at tables "Countries", "States", "Cites" for
address, dialling & postal codes, local time etc, which in turn looks at
other tables such as "Holidays Rules " (world-wide) and their dates,
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=13865
Daylight Saving (Summer) Time Rules date etc ect etc.



"Countries" and "States" require very little maintenance but the "Cities"
table which in fact a locations table (cities, towns, suburbs, villages and
other locations, world wide) is constantly updated. It has around 19,000
records so far.



I am thinking about a possibility of creating one Back End for those tables
as a separate database whereby each of the other databases' Front Ends will
be able to look at and update it as necessary (the routines for it are
already in most of the databases)



At the moment each database has its own set (almost identical) except world
"Holidays Dates" with is updated by one database, once a year, and is linked
to the rest.



Appreciate your views



Regards/JK






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  #2 (permalink)  
Old 28-Jul-2006, 08:41 AM
Arvin Meyer [MVP]'s Avatar Arvin Meyer [MVP]
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Re: I am out of my depth

"JK" wrote in message
news:uTNI1C8rGHA.3648@TK2MSFTNGP03.phx.gbl...
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=13865

> The question:
>
> Can one Front End look at more then one Back End at the same time and if
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=13865
> so can it cause problems in the future replication or otherwise?


One front-end can look at multiple back-ends and it shouldn't cause any
problem with replication. What you are replicating is the back-end only, so
there is only a link on the front-end to the data.

> I am thinking about a possibility of creating one Back End for those
> tables as a separate database whereby each of the other databases' Front
> Ends will be able to look at and update it as necessary (the routines for
> it are already in most of the databases)


I have 15 separate departmental front-ends looking at 1 single back-end. One
of those front-ends connects to 2 other back-ends (total 3 back-end
databases) in 2 different 3rd party applications. It is better to keep all
the data in one place if possible, but sometimes you have no choice.

> At the moment each database has its own set (almost identical) except
> world "Holidays Dates" with is updated by one database, once a year, and
> is linked to the rest.

--
Arvin Meyer, MCP, MVP
Microsoft Access
Free Access downloads
http://www.datastrat.com
http://www.mvps.org/access


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  #3 (permalink)  
Old 28-Jul-2006, 08:41 AM
JK's Avatar JK
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Re: I am out of my depth

Many thanks Arvin,
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=13865

In the meantime I splitted 4 databases and noticed a dramatic reduction in
speed although both ends are on the same computer, the same is also true for
functions that do not look at any data - I disabled the name tracking auto
correct with significant improvement in speed (not sure about repercussions
yet).

I guess it is back to school for me.

Thanks again
JK




"Arvin Meyer [MVP]" wrote in message
news:Oxs6Zd9rGHA.1272@TK2MSFTNGP05.phx.gbl...
> "JK" wrote in message
> news:uTNI1C8rGHA.3648@TK2MSFTNGP03.phx.gbl...
>
>> The question:
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=13865
>>
>> Can one Front End look at more then one Back End at the same time and if
>> so can it cause problems in the future replication or otherwise?

>
> One front-end can look at multiple back-ends and it shouldn't cause any
> problem with replication. What you are replicating is the back-end only,
> so there is only a link on the front-end to the data.
>
>> I am thinking about a possibility of creating one Back End for those
>> tables as a separate database whereby each of the other databases' Front
>> Ends will be able to look at and update it as necessary (the routines for
>> it are already in most of the databases)

>
> I have 15 separate departmental front-ends looking at 1 single back-end.
> One of those front-ends connects to 2 other back-ends (total 3 back-end
> databases) in 2 different 3rd party applications. It is better to keep all
> the data in one place if possible, but sometimes you have no choice.
>
>> At the moment each database has its own set (almost identical) except
>> world "Holidays Dates" with is updated by one database, once a year, and
>> is linked to the rest.

> --
> Arvin Meyer, MCP, MVP
> Microsoft Access
> Free Access downloads
> http://www.datastrat.com
> http://www.mvps.org/access
>
>



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  #4 (permalink)  
Old 28-Jul-2006, 08:41 AM
Tony Toews's Avatar Tony Toews
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Re: I am out of my depth

"JK" wrote:

>In the meantime I splitted 4 databases and noticed a dramatic reduction in
>speed although both ends are on the same computer, the same is also true for
>functions that do not look at any data -


Yes, this is expected behavior.

>I disabled the name tracking auto
>correct with significant improvement in speed (not sure about repercussions
>yet).


Good.

>I guess it is back to school for me.


Just to save you some looking - For more information on performance
visit my Access Performance FAQ page at
http://www.granite.ab.ca/access/performancefaq.htm
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=13865

Tony
--
Tony Toews, Microsoft Access MVP
Please respond only in the newsgroups so that others can
read the entire thread of messages.
Microsoft Access Links, Hints, Tips & Accounting Systems at
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=13865
http://www.granite.ab.ca/accsmstr.htm
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  #5 (permalink)  
Old 28-Jul-2006, 08:41 AM
Smartin's Avatar Smartin
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Re: I am out of my depth

JK wrote:
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=13865
> Many thanks Arvin,
>
> In the meantime I splitted 4 databases and noticed a dramatic reduction in
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=13865
> speed although both ends are on the same computer, the same is also true for
> functions that do not look at any data - I disabled the name tracking auto
> correct with significant improvement in speed (not sure about repercussions
> yet).
>


Great information re: auto correct. Thanks for including that.


--
Smartin
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  #6 (permalink)  
Old 28-Jul-2006, 08:41 AM
Arvin Meyer [MVP]'s Avatar Arvin Meyer [MVP]
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Posts: n/a
   
   
Re: I am out of my depth

Definitely read Tony's performance FAQ. One other speed killer that I should
mention is the use of subdatasheets in your tables. Other than no indexes,
itis probably the top performance killer. Turn them off. (Set them to [none]
in the table's property sheet).
--
Arvin Meyer, MCP, MVP
Microsoft Access
Free Access downloads
http://www.datastrat.com
http://www.mvps.org/access

"Smartin" wrote in message
news:SMOdnSTqF76GOFvZnZ2dnUVZ_t2dnZ2d@giganews.com ...
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=13865
> JK wrote:
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=13865
>> Many thanks Arvin,
>>
>> In the meantime I splitted 4 databases and noticed a dramatic reduction
>> in speed although both ends are on the same computer, the same is also
>> true for functions that do not look at any data - I disabled the name
>> tracking auto correct with significant improvement in speed (not sure
>> about repercussions yet).
>>

>
> Great information re: auto correct. Thanks for including that.
>
>
> --
> Smartin



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  #7 (permalink)  
Old 28-Jul-2006, 08:41 AM
JK's Avatar JK
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Posts: n/a
   
   
Re: I am out of my depth

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I don't have any subdatasheets, all search or sort fields are indexed, all
subdatasheets are/were on "Auto", changing then as I go (ouch my finger
hurts

I need to remove some bells and whistles, possible even break up some forms
into 2 or more, particularly those that have more than one subform based on
some "heavy" queries - but so be it .

I also noticed that having done the changes, The change in speed further
noticeable after I restart the computer.

Getting there ....

Thanks again
JK



"Arvin Meyer [MVP]" wrote in message
news:OhuJ10FsGHA.3684@TK2MSFTNGP05.phx.gbl...
> Definitely read Tony's performance FAQ. One other speed killer that I
> should mention is the use of subdatasheets in your tables. Other than no
> indexes, itis probably the top performance killer. Turn them off. (Set
> them to [none] in the table's property sheet).
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=13865
> --
> Arvin Meyer, MCP, MVP
> Microsoft Access
> Free Access downloads
> http://www.datastrat.com
> http://www.mvps.org/access
>
> "Smartin" wrote in message
> news:SMOdnSTqF76GOFvZnZ2dnUVZ_t2dnZ2d@giganews.com ...
>> JK wrote:
>>> Many thanks Arvin,
>>>
>>> In the meantime I splitted 4 databases and noticed a dramatic reduction
>>> in speed although both ends are on the same computer, the same is also
>>> true for functions that do not look at any data - I disabled the name
>>> tracking auto correct with significant improvement in speed (not sure
>>> about repercussions yet).
>>>

>>
>> Great information re: auto correct. Thanks for including that.
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=13865
>>
>>
>> --
>> Smartin

>
>



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