Clarification needed on this KB - https://kb.netapp.com/app/answers/answer_view/a_id/1000287

[ASH2017]

Hi Folks,

According to this KB:
https://kb.netapp.com/app/answers/answer_view/a_id/1000287

In the output of sis status -l for the same volume, the following line is included:

Logical Data: 3509 GB/49 TB (7%)

Logical 4K records are = 919863296

Total checked 4K records are = 18115836411

Hence, Filer is consuming total 4KB blocks = 18115836411 - 919863296 = 17195973115 (4K records)

Total size in TB = 17195973115 / 1024 / 1024 / 1024 = 16TB

Does that mean = out of 49 TB, 16Tb is been consumed by stale-fingerprints, and if consider 20% of total logical data i.e = 20 % 3509GB = 701GB = 0.7 TB

Total space that can be recovered = 16 - 0.7 = 15.3Tb can be recovered 

Is that correct calculation ?

Thanks

Ash

[ASH2017 · Accepted solution]

I think I foud the clue in the same document:

Size of each record = 32 bytes

= 17195973115 x 32 = 550271139680 bytes

= 55027113968 / 1024 / 1024 / 1024 = 512GB NOT 16TB