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ASM : Intelligent Data Placement (IDP)

Starting 11gr2,

ASM now classifies reads/writes into two - COLD and HOT. As you guessed, HOT read/writes are those coming from the blocks which are classified as HOT - meaning placed in the outer sectors. COLD is the default - meaning data placed in inner sectors. Data blocks of most often accessed segments are candidates for placement in HOT region. This is done at the datafile level in an ASM disk.

ALTER DISKGROUP ASMDISK01 MODIFY FILE '+ASMDISK01/BDBE01/DATAFILE/APP_DATA.256.697380955' ATTRIBUTES (HOT)

Checking different compatibility modes of disk attributes

image

-Thanks

Geek DBA

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