CDN/Hardware

This is an overview of our currently deployed and active cache hardware at the Traffic layer.

Hardware classes

We have purchased and retired multiple classes of server hardware over the years in staggered timeframes. In the general case we'll always have multiple overlapping classes of hardware as various warranty and support periods expire. These are the currently-active hardware configuration classes:

Label	Model	CPU Type/Speed	Phys Cores	RAM	Cache storage	NIC speed, type, driver	DC Ops Config
F2	Dell R440	2x Xeon Gold 5118 @ 2.3Ghz	24	384 GB	1x Samsung PM1725b 1.6TB NVMe (HHHL Card)	10G, BCM57412, bnxt	F-10G, +storage card
F3	Dell R440	2x Xeon Gold 5118 @ 2.3Ghz	24	384 GB	1x Samsung PM1725b 1.6TB NVMe (HHHL Card)	10/25G, BCM57412, bnxt	F-10G, +storage card, +10/25G NIC variant
F4S	Dell R450	2x Xeon Gold 5318Y @ 2.1Ghz	48	512 GB	1x 6.4TB NVMe Card	10/25G, BCM57414, bnxt	F (*)
F4D	Dell R450	2x Xeon Gold 5318Y @ 2.1Ghz	48	512 GB	2x 6.4TB NVMe Card	10/25G, BCM57414, bnxt	F (*)

F4: The new DC Ops Config F from mid-2022 is exclusive to these edge cache roles, and thus our F4 config using it includes the storage cards and NIC upgrades as part of its base definition.
F4S configs are being phased out early by upgrading them to F4D by adding the extra storage card. They should all be F4D well before we get to the next refresh of drmrs, at which point we'll probably just go back to calling them all F4.

Deployed hardware

Currently deployed hardware by data center and caching cluster.

Current as of March 2024
Data center	cache_text	cache_upload	total	Next refresh (~5y out, CY)
eqiad	8x F4D	8x F4D	16x F4D	Q4 2028
codfw	8x F2	8x F2	16x F2	Q1 2025
esams	8x F4D	8x F4D	16x F4D	Q3 2028
ulsfo	8x F4S	8x F4D	16x F4x	Q4 2027
eqsin	8x F4S	8x F4D	16x F4x	Q4 2027
drmrs	8x F3	8x F3	16x F3	Q4 2026
magru	8x F4D	8x F4D	16x F4D	Q2 2029
Totals	56	56	112