Different size TDATS in Thin Pool for max capacity config

Question

Hi --    We have a bin for a new vmax and i noticed two different size TDATs that were created to maximize the use of the spindles.  I beleive the offset was created to include gatekeepers.   My question -  Is it Ok to run two different size TDATS in a thin pool?

Quincy561 · Accepted Answer

It is OK to have slightly different TDAT sizes in the pool to accommodate various internal devices such as SFS, Vault, gatekeepers, etc.

Quincy561 · Answer

The smaller ones are 5% difference in capacity, the larger ones are less than 1% off. This means you may have a difference in IOPs on those TDATS of 5%. Nothing to worry about in my opinion.

If some were twice as large, they could have twice the IO rate, and the smaller ones would fill first causing all new allocations to come from only the larger ones.

red1918sox · Answer

Thanks --    What number kind of numbers should i be worrying about?  Differences shown below.. 34975 36642 259341 261160

sauravrohilla · Answer

is it 5876 code? Why not use Thin GK devices? regards, Saurabh

Symmetrix

Different size TDATS in Thin Pool for max capacity config

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