Reallocation Measurement - Interpretation

rnugent2068 — Thu, 05 Jun 2025 07:01:43 GMT

I'm running reallocation measurments on a number of SQL LUNs, and have been unable to find a few definitions. If anyone can point me to a reallocate TR, that would make my day.

If not - can anyone define for me the following (to begin with, anyway...) from the Layout Measurment Log?

"min_zones/actual zones" , "Hot-spot VBNs" , and - "Hot-spot Factor"

Here are the terms in context:

Layout Measurement Log

Volume: stage_a2, inode 101

Block ratios

min_zones/            count of
actual zones           L1 blocks.
0%                           0
1%                           2
2%                           11
3%                           3
.......
98%                           0
99%                           0
100%                        12
Total L1 blocks: 23290
Total VBN: 11866124
Average VBN/L1: 509
Average VBN/inode: 11866124
Total min_zones: 186181
Total holes: 11776
Total zones: 622508
Total sig holes: 17820
Total small gaps: 39220
Total factor: 627381
Total Hot-spot VBNs: 389108, 3%

Hot-spot Factor: 17.43
Result Ratio: 3.36
Expected Ratio: 1.25

Re: Reallocation Measurement - Interpretation

radek_kubka — Sat, 22 Jan 2011 16:40:35 GMT

Hi,

Reallocate TR doesn't exist I am afraid - but no doubt it is needed!

Probably the biggest amount of reallocation-related info in one place can be found here:

http://communities.netapp.com/message/20969#20969

Regards,

Radek

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Reallocation Measurement - Interpretation

Re: Reallocation Measurement - Interpretation