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  Oracle Backup VLDB tips

Oracle Database Tips by Donald BurlesonMarch 26, 2015

Question:  How to I manage a Oracle backup of a VLDB (very large database)?

Answer:  RAC with Grid is an ideal solution to take advantage of these developments. RAC supports VLDB databases for data consolidation and large data warehousing databases. Even in a packaged application environment, as in SAP or PeopleSoft, there is a tendency towards consolidating the databases to provide lower cost and better administrative flexibility.

With the power of processors today, reducing a corporation's database server footprint to be a tenth of what it was is a real possibility. Virtual machines are a big part of enterprise server consolidation efforts. Oracle VM is a less known product in the Virtual Machine marketplace but is interesting because it is fully supported for various Oracle products. See MOSC Doc 464754.1 for the latest information about RAC on Oracle VM.

Partitioning an Oracle backup VLDB

Database size has grown to a point where they are now measured in the hundreds of gigabytes, and in some cases, several terabytes. The characteristics of very large databases (VLDB) demand a different style of administration. The administration of VLDB often includes the use of partitioning of tables and indexes.

Since partitioning is such an integral part of VLDB the remainder of this article will focus on how to partition, specifically, the partitioning of tables in an Oracle  environment.

  • Partitioning Defined

  • When To Partition

  • Different Methods Of Partitioning

  • Partitioning Of Tables

  • Partitioning Of Indexes

There are two main reasons to use partitioning in a VLDB environment. These reasons are related to management and performance improvement.

Partitioning offers:

  • Management at the individual partition level for data loads, index creation and rebuilding, and backup/recovery. This can result in less down time because only individual partitions being actively managed are unavailable.
  • Increased query performance by selecting only from the relevant partitions. This weeding out process eliminates the partitions that do not contain the data needed by the query through a technique called partition pruning.

See these related notes on Oracle Backup VLDB.

   
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Note: This Oracle documentation was created as a support and Oracle training reference for use by our DBA performance tuning consulting professionals.  Feel free to ask questions on our Oracle forum.

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