your over all design should be based on vougae accounting and not on normal business accounting method. from your mail/description it looks like database server will be in the transport bus..instead going for a flat file will be good option I suppsoe, tools like SSIS, oracle discoverer are better options for datacleansing, loading and such other work thanks..subodh On 27 August 2010 19:03, Upendra N <nupendra@xxxxxxxxxxx> wrote: > Are you suggesting 10K GPS units will be sending inserts every 5 seconds to > the database? > 60 seconds = 12 * 10K = 120K records? Since they are individual units I > assume the transactions will be committed for every record -120K > transactions/sec. > You'll have lots of opportunities to tune your production database.. :) You > may want to look into using SSDs for redologs. > > Is the data purged from these tables periodically? If so, that will define > your replication strategy, because any deletes you'd run on these tables > will also have to be replicated across in addition to the normal replication > traffic. You could also consider creating partitioned table with daily > partitions so you can drop them after certain time. > > With this many records/transactions any trigger based replication will be a > nightmare to manage. You may want to look into Active Dataguard from 10g to > 11g (as Andrew suggested), Streams or logical standby database. > > Near real-time replication requirements with this volume of data will be > too difficult to handle if there was a network glitch, you'll have difficult > time recovering from a 2-3 hour network outage. You really need to think if > it is even worth setting up the second database as supposed to dedicate a > RAC node in production for reporting/read only operations. > > -Upendra > > > > ------------------------------ > Subject: RE: Real time data trasfer between 2 DB > Date: Fri, 27 Aug 2010 09:59:19 +0200 > > From: Arvind.Kumar@xxxxxxxxxxxxx > To: nupendra@xxxxxxxxxxx; oracle-l@xxxxxxxxxxxxx > > > Hi Upendra, > > > > Thanks for the suggestions. > > > > - There will be three tables for initial load with 2.7GB in total. > - Destination table only be used for reporting so not updates. > - There would be 10000GPS units which will send their coordinates and > other information > > At every 5 second so (10000) records would need to be transferred > destination database with every refresh. > > - We are using varchar2 and number in those tables. > > > > Thanks > > Arvind Kumar > > > ------------------------------ > > *From:* Upendra N [mailto:nupendra@xxxxxxxxxxx] > *Sent:* Friday, August 27, 2010 7:51 AM > *To:* Arvind Kumar (IT-SIS-UIF); oracle-l@xxxxxxxxxxxxx > *Subject:* RE: Real time data trasfer between 2 DB > > > > Hi Arvind, > Depends on the flexibility on "near real time" requirements, you could use > the following: > > 1. Materialized views - You could setup MVs with fast refresh to every > minute or 30 seconds refresh interval. Depending on your read-only or read > write requirements on the tables, this may or may not work. This is easy to > setup and easy to manage. > 2. Active Data guard - If you want only a read only database at the other > site, this will work. > 3. Advanced replication - You could setup replication interval to 30-60 > seconds. Provides flexibility to use tables that can be updated at both the > databases. > 4. Oracle Streams - You could setup schema level or selective table level > replication, replication interval could be 30-60 seconds. > 5. Depending on the flexibility you could also consider Oracle RAC - Metro > cluster where RAC nodes spread across multiple data centers. > > Near real time could be 5 milliseconds or 5 minutes... you need to define > this. > > Some of the questions you need to clarify: > How large are the initial size of the tables? > Do you want update capabilities on the destination database? > How much data will you generate between the refresh interval? > Do you have any special data types that needs to be replicated? > > -Upendra > > > ------------------------------ > > Subject: Real time data trasfer between 2 DB > Date: Fri, 27 Aug 2010 07:21:59 +0200 > From: Arvind.Kumar@xxxxxxxxxxxxx > To: oracle-l@xxxxxxxxxxxxx > > Greeting all, > > > > What would be the best method to transfer data between two databases (10g > R2) in real time (near real time). It’s a transport system where GPS devices > installed in City Buses inserts records (location, timings) into oracle DB > then this data has to be transferred to other oracle DB for reporting with a > max latency on 5 second. > > Any input or experience on similar scenario will be highly appreciated. > > > > Thanks > > Arvind Kumar > > > -- ============================== DO NOT FORGET TO SMILE TODAY ==============================