El jue, 31-01-2002 a las 09:21, Mensing, Joerg escribi�:
>
> > * Can I use linux raw devices for devspaces?
>
> Its a little bit depend on your LINUX version, but it is possible with the
> right LINUX patches.
Where I can get these patches ?
>
> > * It's there any product for online replication of database (SGDB
> > master -> SGBD slave), like mysql's one ?
> not yet, but it is planned and has at least already a name: Replication
> Manager
>
> > * It's there a tool or command like VACUUM in Postgresql or isn't
> > neccessary?
> I don't know VACUUM.
>
Vaccuum is used to free the space used by deleted rows, updated ones ,
etc and for recreate the optimizer statistics.
> > * Could somebody explain me the different types of databases
> > DW,LiveCache,etc...
>
> SAPDB has one executable, that is configured for special purposes. LIVECACHE
> is used to setup SAPDB primarily as Memory Database with ability to store
> persisitent Objects. DW (Datawarehouse) is used primarily for data mining.
> CS (ContentServer) is used if database is setup for documentation storage.
> OLTP (OnlineTransaciotnProcessing) is used for 'normal' SQL business. Each
> instance configures a special set of parameters, i.e. Only Livecache
> instances allow OMS_REGIONS, setup more strictive request-timeouts, setup
> garbage collectors, setup different stack size etc.
>
In a area of my project I need to pass data between two process very
quickly, about 30 records/sec. One processes put the data and anothers
take it, process and next delete it. Due a design requirement I need to
do that throught a DB. Must I configure this db as LiveCache ?
Many thanks.
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