Fully describing Tranquility Tech IV’s Ecosystem today is not simple. EVE Online now spans across the on-premise cluster and services and also various cloud services that both the EVE Client and Tranquility connect to: this includes Chat, Search, Image Server, a message bus with multiple gateways, and a whole host of smaller domain services, each one with a targeted scope. In addition, there are fully external services such as Project Discovery. The difference between PROXY nodes and SOL nodes in the Tranquility cluster is mostly that session management is on the PROXY nodes even if some processing happens there as well (e.g. there is a dedicated market proxy service that fronts the market sol service). But there was also an intended architecture of the PROXY nodes being spread across the world with dedicated network backhaul. Instead, we eventually ended up moving the London datacenter’s network behind Cloudflare’s network services in early 2020, after adjusting our DDoS protection for over a decade, using Cloudflare since then as the front door.
E7-8893 v3 CPUs and there were another identical set of machines for other databases. It was clear that a single such machine wasn’t enough for the game DB, but since that other set of machines was effectively idling they were joined together. As in, literally joined together physically with a special clip. Lenovo calls this QuickPath Interconnect (QPI). Out of the four machines we then got a set of primary/standby 'machines' where each one was actually two machines joined together and acting as one. There was a dramatic video of this at Fanfest 2018.The old database hardware were magnificent beasts of a different era. After the datacenter move in 2016, the game DB was running on two machines (primary/standby pair) with
E5-2667 v3 machine, then later moved to a Gold 5122 machine, and then a Gold 5222 machine, all of which were not the rank-and-file machines of Tranquility Tech III. By contrast, currently Jita is on a Gold 6334 machine, which are the rank-and-file machines of Tranquility Tech IV.So it was decided to buy fewer but larger machines to replace them. Tranquility is arranged in five 'Rank-and-file' is how we refer to the largest group of machines in Tranquility that mostly handle solar system simulation. Tranquility isn’t a homogeneous cluster, neither from a hardware perspective nor a software perspective. Various services, such as the market, are on different hardware and loaded solar system such as Jita are separate. In Tranquility Tech III Jita started off on a FLEX chassis (with a 6th spare chassis).
The new machines are Lenovo ThinkSystem SN550 v2 dual-CPU machines with two octo-core Intel Xeon A node is a PROXY or SOL process in the game cluster that is assigned specific tasks. For example in Tranquility Tech IV there are 170 nodes assigned to general solar system simulation for all Empire, Null, and Wormhole solar systems. But on the other end of the spectrum Jita is solo on one node and the market for The Forge is solo on another node.Gold 6334 3.60 GHz processors and 512GB DDR4 memory at 3200 MHz.