1 Reply Latest reply: Nov 6, 2013 3:30 AM by richard_mackerras RSS

Rate of change

GTHOMAS13 Novice
Currently Being Moderated

Hi all

 

Could someone please assist me on how the process of calculating the ROC works.

I have results of "snap delta" command, just not exaclty sure of the formula used to get the final result..

 

Many thanks

  • Re: Rate of change
    richard_mackerras Novice
    Currently Being Moderated

    Hi,

     

    The first thing to do is delete any snapshots that you don't want in the calculation and give the system time to free the disk space. This matters if you have a 6 month old snapshot the DBAs left there after an upgrade.

     

    You know how much data changed in the volume from "df -k vol_name". You don't know if it is growth or churn from "df".

    The "snap delta" tells you the rate.

     

    Why not post here the output of "df -k vol", "snap list vol" and "snap delta vol". I'm sure several of us will give you some (contradictory) answers.

     

    Cheers,  Richard

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