Level Extreme platform
Subscription
Corporate profile
Products & Services
Support
Legal
Français
How much data moves from Server to Client?
Message
From
04/12/1999 00:54:48
 
General information
Forum:
Visual FoxPro
Category:
Databases,Tables, Views, Indexing and SQL syntax
Miscellaneous
Thread ID:
00298027
Message ID:
00298605
Views:
18
>>>Logically speaking, it is the entire table move across the network and then manipulated in the client machine because VFP table no matter where it resides is still a desktop database / client database.
>>
>>Jess, who cares how it works "logically"? Physically, it does not bring the entire table across at once *unless* it's small.
>
>Bruce,
>
>We are talking of the process here. While the physical table resides in the server, the client will do all the processes in itself bringing down all the data across the network because VFP table is a desktop database. Besides, filtered indexed is not a Client/Server command, it's built in the table. That's why the first execution is slower although insignificannt because the second or third execution manipulates cached data.

No, the filter is contained in the index - the entire index would be grabbed and used as a guide to grab the next record in a SCAN loop here, and clean records would be retained on the local system unless the server marks them as dirty (changed) - there's no prefetch executing the SCAN, and when dealing with an index containing a filter, it is not considered for Rushmore optimization to construct the set of values that are members of the SCAN's working set.
EMail: EdR@edrauh.com
"See, the sun is going down..."
"No, the horizon is moving up!"
- Firesign Theater


NT and Win2K FAQ .. cWashington WSH/ADSI/WMI site
MS WSH site ........... WSH FAQ Site
Wrox Press .............. Win32 Scripting Journal
eSolutions Services, LLC

The Surgeon General has determined that prolonged exposure to the Windows Script Host may be addictive to laboratory mice and codemonkeys
Previous
Next
Reply
Map
View

Click here to load this message in the networking platform