Materialized Views Vs. Streams Replication
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From: Ora_DBA on 11 Mar 2010 12:12 I have a questions for Oracle Gurus: We have a database that has about 70 tables. We need to replicate 32 out of these 70 tables into another database. Both the source and the target database are Oracle 11gR1 and the OS is HP-Unix. The DB and the OS version is the same for both the source and the target database. Out of these 32 tables, about 10-15 are transaction tables. Remaining tables are lookup tables. The volume of records changed( Inserted/Updated/Deleted ) is about 1.5 millions per day. There are no restrictions in implementing streams replication. Between Oracle Materialized Views with Fast Refresh option and Streams Replication, which is the less resource- intensive option for the replication ? Since we don't hace access to the production machine, we can't do any benchmarking now. Development machine is airtual machine wiyh less memory and less number of CPUs. From what I know, Oracle Materialized Views are less robust but easy to implement and Streams Replication is Robust but more complicated. I don't know how they compare performance wise. If you have any preference between the two options, plese let me know. Thanks in advance, - Sanjay
From: ddf on 11 Mar 2010 16:49 On Mar 11, 12:12 pm, Ora_DBA <sanjaydharmadhik...(a)gmail.com> wrote: > I have a questions for Oracle Gurus: > > We have a database that has about 70 tables. We need to replicate 32 > out of these 70 tables into another database. Both the source and the > target database are Oracle 11gR1 and the OS is HP-Unix. The DB and the > OS version is the same for both the source and the target database. > > Out of these 32 tables, about 10-15 are transaction tables. Remaining > tables are lookup tables. > The volume of records changed( Inserted/Updated/Deleted ) is about 1.5 > millions per day. There are no restrictions in implementing streams > replication. > > Between Oracle Materialized Views with Fast Refresh option and Streams > Replication, which is the less resource- intensive option for the > replication ? Since we don't hace access to the production machine, we > can't do any benchmarking now. Development machine is airtual machine > wiyh less memory and less number of CPUs. > > From what I know, Oracle Materialized Views are less robust but easy > to implement and Streams Replication is Robust but more complicated. I > don't know how they compare performance wise. > > If you have any preference between the two options, plese let me know. > > Thanks in advance, > - Sanjay I've seen better performance with Streams than with Materialized Views since Streams is using logminer to generate the statements to apply changes. My two cents. David Fitzjarrell
From: Shakespeare on 12 Mar 2010 02:45 Op 11-3-2010 18:12, Ora_DBA schreef: > I have a questions for Oracle Gurus: > > We have a database that has about 70 tables. We need to replicate 32 > out of these 70 tables into another database. Both the source and the > target database are Oracle 11gR1 and the OS is HP-Unix. The DB and the > OS version is the same for both the source and the target database. > > Out of these 32 tables, about 10-15 are transaction tables. Remaining > tables are lookup tables. > The volume of records changed( Inserted/Updated/Deleted ) is about 1.5 > millions per day. There are no restrictions in implementing streams > replication. > > Between Oracle Materialized Views with Fast Refresh option and Streams > Replication, which is the less resource- intensive option for the > replication ? Since we don't hace access to the production machine, we > can't do any benchmarking now. Development machine is airtual machine > wiyh less memory and less number of CPUs. > > From what I know, Oracle Materialized Views are less robust but easy > to implement and Streams Replication is Robust but more complicated. I > don't know how they compare performance wise. > > If you have any preference between the two options, plese let me know. > > Thanks in advance, > - Sanjay > Streams. And it is not (too) complicated (at least, when you are at 10.2 and up). It can be configured on a per table basis from within EM. But you need access to the source (= production) machine to configure streams. Unlike MV's, streams are initiated from the source, not the target database. To set up streams (IIRC) you need db-links both ways. Shakespeare
From: Frank van Bortel on 13 Mar 2010 04:40
Ora_DBA wrote: > I have a questions for Oracle Gurus: > > We have a database that has about 70 tables. We need to replicate 32 > out of these 70 tables into another database. Both the source and the > target database are Oracle 11gR1 and the OS is HP-Unix. The DB and the > OS version is the same for both the source and the target database. > > Out of these 32 tables, about 10-15 are transaction tables. Remaining > tables are lookup tables. > The volume of records changed( Inserted/Updated/Deleted ) is about 1.5 > millions per day. There are no restrictions in implementing streams > replication. > > Between Oracle Materialized Views with Fast Refresh option and Streams > Replication, which is the less resource- intensive option for the > replication ? Since we don't hace access to the production machine, we > can't do any benchmarking now. Development machine is airtual machine > wiyh less memory and less number of CPUs. > > From what I know, Oracle Materialized Views are less robust but easy > to implement and Streams Replication is Robust but more complicated. I > don't know how they compare performance wise. > > If you have any preference between the two options, plese let me know. > > Thanks in advance, > - Sanjay > As usual: it depends. MV's as well as Streams are valid options. Just test and see what fits your exact scenario best. I've seem Streams crumble and crash under load, but that was in an earlier version. -- Regards, Frank van Bortel Topposting in Usenet groups I regard as offensive - I will not reply |