sikkerhed i distribuerede databaser

What type of dB are we talking about Access, SQL Server. Also, what is the difference between a dB and a DDB?

hvilke ddbms'er har du i søgelyset ?

Jeg spørger sådan set om foreskellen mellem en distribueret database (bruges af mere end én maskine) og en almindelig database(der kun bruges af en maskine) i forhold til sikkerhed og performance generelt set

Well it all depends on which database we are talink about, they can have different methods of security. It also depends on the requirements! It may not be necessary to have any security at all, but then again it may be necessary for some users to only have read permissions and other read and write. Other users may have administrator permissions, allowing then to make desging changes. But generally there WILL be a need for some security, be it only to stop users from altering the design.

er der tale om geografisk adskilte sites (tænker på performance) ?

Det vil nok højest sandsynligt være IBM's DB2, men intet er sikkert.
Nej den vil ikke være geografisk adskilt

there will ALWAYS be perfomance penalties to pay putting your dB on a network of some sort.

Dont know ANYTHING about IBM's DB2, but it will almost certainly require user or group permissions as do most realtional databases, which I am sure DB2 is.

Ja det vil den jo nok. Du skal have tak for hjælpen  terry

selv tak :o)

mhinri>If you're happy with the answer then can you accept it please?

tak :o)