Database Backup and Recovery (MOSC)

MOSC Banner

RMAN & CIO/ASYNC

edited Jul 8, 2015 10:03AM in Database Backup and Recovery (MOSC) 2 commentsAnswered

Hi All,

I'm currently doing some testing with RMAN ACTIVE DUPLICATE with our 1.8TB EBS environment which is sat on AIX 6.1.  We're currently using CIO (via filesystemio_options=setall) and I've found the RMAN Duplicate to take a long time (approx 14 hours), but when changing to ASYNC (filesystemio_options=async) the RMAN Duplicate takes around 7 hours.

I was always led to belive that the Oracle recommendation was to use CIO or DIO so that the data isn't passing through the FS Cache.

Could there be something wrong with our configuration (Oracle or AIX), or is this expected behaviour?  Are there any setting that people can advise we look at?

Howdy, Stranger!

Log In

To view full details, sign in to My Oracle Support Community.

Register

Don't have a My Oracle Support Community account? Click here to get started.

Category Leaderboard

Top contributors this month

Instructions for posting

×

1. Select a discussion category from the picklist.


2. Enter a title that clearly identifies the subject of your question.


3. In the body, insert detailed information, including Oracle product and version.


Please abide by the Oracle Community guidelines and refrain from posting any customer or personally identifiable information (PI/CI).


Cloud / Fusion customers - Our Cloud community has moved! Please go to Cloud Customer Connect .


New to My Oracle Support Community? Visit our Welcome Center

MOSC Help Center