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Traffic cache hardware

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

Deployed 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
L Dell R430 2x Xeon E5-2650 v4 @ 2.20GHz 24 384 GB 2x Intel S3710 800GB SSD 10G, BCM57810, bnx2x Legacy
F Dell R440 2x Xeon Gold 5118 @ 2.3Ghz 24 384 GB 1x Samsung PM1725b 1.6TB NVMe (HHHL Card) 10G, BCM57412, bnxt F-10G, add custom Cache Storage card

Note: The first batch of F-config hosts (all 16 in eqiad) had a slightly different Cache Storage config: "1x Samsung PM1725a 1.6TB NVMe (U.2 SFF)"

Deployed Server Hardware by Datacenter and Cluster

Datacenter text upload total
eqiad 8xF 8xF 16xF
codfw 8xF 8xF 16xF
esams 8xF 8xF 16xF
ulsfo 6xL 6xL 12xL
eqsin 6xL + 2xF 6xL + 2xF 12xL + 4xF = 16
total 12xL + 26xF = 38 12xL + 26xF = 38 24xL + 52xF = 76

Known upcoming changes

  • drmrs - New site being built out in Marseille, to come online in late 2021. 16xF, but with bnxt NICs upgraded to 25G models
  • ulsfo - Being expanded with 4xF in late 2021 to increase capacity/redundancy, just like we did earlier with eqsin