partition table

When we need to use the partition table?

Partitioning defined

The concept of divide and conquer has been around since the time of Sun Tzu (500 BC). Recognizing the wisdom of this concept, Oracle applied to management of large tables and indexes. Oracle has continued to evolve and refine its capabilities of partitioning since its first implementation of the Oracle 8 range partitioning. Oracle 8i and 9i, Oracle has continued to add features and new methods of partitioning. The current version of Oracle 9i Release 2 continues this tradition by adding new features to the list partitioning and partitioning method new range-list.

When the partition

There are two main reasons to use partitioning in an environment of VLDB (very large database). These reasons are related to improving the management and performance.

Partitioning offers:

  • Management at the level of individual partition for data loads, creating indexes and reconstruction, and backup/restore. This may cause more quickly down, because only actively managed individual partitions are not available.
  • Performance of the queries increased by selecting only the relevant partitions. This process of weeding out the partitions that do not contain the data required by the application via a technique called the size of the partition.

Use the partitioning:

  • When a table reaches a size "large". Large being defined according to your environment. Greater than 2 GB should always be considered for partitioning of tables.
  • What performance benefits outweigh the extra management issues related to partitioning.
  • When the archive data is on a calendar and repetitive. For example, data warehouses are usually given for a certain period of time (rolling window). Old data is then output to archive.

Tags: Database

Similar Questions

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  • Qosmio x 500 - 14W - invalid partition table

    Hay guys,

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    Hello

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    ------------------------------------------------------------------------

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    ------------------------------------------------------------------------

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    976773167 1 dry GPT header

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    Thank you very much

    NEUMAC

    In Fdisk, the CHS numbers are arbitrary on modern disks. They are the time of BIOS and old disks with CHS geometry. Puts BCA from Mac 0-1023 (1024 cylinders), 0-255 (256 heads) and 0-63 (64 sectors). Modern disks far exceed those numbers and would drain them. Must match what is the triplet of start/end/size and it fits in GPT and MBR. You can put arbitrary 0,0,0 for CHS and you will see all issues on GPT disks.

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  • invalid partition table

    invalid partition table is displayed on my screen, pl help out me...

    Exactly what happened before you saw the error message?

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  • Partition table / no entry of safe mode

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    HELP ME OB 1... YOUR MY ONLY HOPE THOMAS

    Hi Thomas,

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    ·         You get the error message?

    I suggest you to run the disk check to check for possible errors.

    How to perform disk error checking in Windows XP

    http://support.Microsoft.com/kb/315265

    Note: If bad sectors are found in the hard drive, then it could try to fix this particular sector. If you have any data on that, it can get lost.

  • How to recover the partition table (corrupt) for the partition in good health?

    Partition (drive H) was working fine, then I rebooted my system normally and the drive is now inaccessible.

    "An error occurred reading the file: the file or directory is corrupted and unreadable." (1392).

    Window CMD CHKDSK says NTFS file system and "unable to determine the State and version volume.»

    [This is a disk external drive with 2 partitions on it - H and Mr. the second partition (drive M) discs works fine.]
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    Try the procedure described in the article below

    http://www.ehow.com/how_7500292_recover-bad-partition-table.html

  • Invalid partition table appear on my HP a1700n

    Can a

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  • Partition table does not have a valid system partition

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    Hi countryboyofal,

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    http://support.Dell.com/support/topics/global.aspx/support/DellCare/contact_us?c=us&l=en&s=Gen&redirect=1

     

    I hope this helps!

    Halima S - Microsoft technical support.

    Visit our Microsoft answers feedback Forum and let us know what you think.

  • Partition table is corrupted how to fix?

    Hello, I get this error after I turned off my computer (by the button) because it had frozen it had been frozen for 3 hours and I decided to hold it down for 5 seconds (stop the power) and I turned it back and it started. Is there a solution? I get the error message: "Partition table is corrupt on disk \Device\Harddisk0. Repair action: repair of partition result table: failure. Error code = 0 x 490 time: Mrs 160572

    Hello

    With the publication of the description, I understand that you are having problems to start your Windows 7 computer and gets also a errors of Partition table is corrupt on disk \Device\Harddisk0 code = 0 x 490. I will certainly help you get this fixed number.

    I suggest you refer to the suggestions by Stephanie Podder replied on 27 November 2011 in the below mentioned thread and check if this is useful:

    http://answers.Microsoft.com/en-us/Windows/Forum/all/partition-repair-startup-repair-failed-error-code/3af92d1a-e7ef-451D-9adc-3f7ffe8bb9c4?page=1

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    What is going on?

    I had the same problem and more research and found this, followed and he helped her get up and going again

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  • Partitioning of an existing partitioned table

    Dear Experts,

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    (

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    P2015_11 PARTITION,

    P2015_12 PARTITION,

    P2016_01 PARTITION,

    PARTITION P_DEFAULT);

    However, now in Oracle 12 c I am able to use the reference interval partitioning. How can I redefine the partitioning of the parent table so that there can be scope-level?

    Thank you for your help.

    Best regards, Atanas.

    To change range partition to partition interval, the table should not have MAXVALUE partition... Follow the steps below to convert to partition interval

    (1) check if all data of the MAXVALUE partition (p_default) using query below

    SELECT COUNT (*) FROM parent PARTITION (p_default).

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    (3) use the clause SET INTERVAL to convert the range partition partition interval as below

    ALTER TABLE parent SET INTERVAL (NUMTOYMINTERVAL(1,'MONTH'));

    I guess, you have the range partition up to until, so there should not be any folder in p_default partition.

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