Potential discrepancy in DAOS stats

[felker]

https://github.com/argonne-lcf/user-guides/blob/main/docs/aurora/data-management/daos/aurora-storage-architecture.png

• 220 PB
• 25 TB/s

Compared to some other recent talks like ATPESC 2023, which lists:

• 230 PB
• 31 TB/s

The latter figures are more common, I think. What is the right answer?

[felker]

@kevin-harms

[kevin-harms]

The 220PB number is correct. I can update the ≥ 25TBs to be 31TBs in the image and upload a new version.

[felker]

thanks @kevin-harms!

[felker]

do you have a new image ready @kevin-harms ?

[felker]

I also see from the IAC talk from June 2023 that the DAOS system has 250 PB NVMe at 31 TB/s, but only ~230 PB of usable capacity @ EC16+2

depends on what users choose for data protection – EC16+2 is erasure code with 16 data chunks and 2 parity chunks (allows surviving 2 failures)

I will just make a new PNG myself, unless you have the PPTX source @kevin-harms