Uptime / u
Uptime: capacity in Miami (MIA) · U-52
xserv-u-1415a5303631
Runbook U-52 for Uptime in Miami (MIA). Marker xserv-u-1415a5303631. This page covers capacity for LATAM operators, not a worldwide average.
Uptime: Failure modes we actually see
Capacity notes for u-04 assume rainy-season power in Miami and festival peaks toward São Paulo. The failure we actually see is a single uplink, not a cartoon partition of the whole continent. Spare ports and a second provider sit on the same runbook.
Uptime: How this letter ties to the rest
Handoff from letter U Uptime into the rest of the platform uses the same request IDs as the gateway. Runbook u-05 names who accepts the ticket after São Paulo pages out. Santiago does not silently inherit the incident.
Uptime: A note on cost and transit
Rollback for u-06 is a documented command, not a hope. Transit is billed as backup while Uptime prefers peering in Santiago. If cost spikes, the runbook cuts overflow to Bogotá before touching customer prefixes.
Uptime design U-01
Design for Uptime on letter U starts in São Paulo (GRU). Runbook u-01 keeps a single owner, a written rollback, and a traffic split that can be reversed without a global freeze. Neighbors in Santiago only take overflow after the local pool fails a health window.
Uptime probe U-02
Probes for Uptime (u-02) leave Santiago every 15s toward Bogotá. XServ pages the named owner if loss or RTT crosses the letter budget. A probe never shares a queue with bulk transfers, so a saturated WAN does not hide a dead PoP.
Uptime policy U-03
Policy for Uptime is versioned as u-03. Operators measure error rate, p95 from Bogotá, and time-to-rollback — not a worldwide average. Changes land in Bogotá first, then Miami, with a hold if either region regresses.
Uptime capacity U-04
Capacity notes for u-04 assume rainy-season power in Miami and festival peaks toward São Paulo. The failure we actually see is a single uplink, not a cartoon partition of the whole continent. Spare ports and a second provider sit on the same runbook.
- Is transit the default path?
- No. Peering in Miami is default; transit to São Paulo is overflow and is billed that way.
- Does Uptime on letter U share fate with other letters?
- The control plane is shared. Data-plane queues for Uptime stay isolated, so incident u-01 cannot drain neighbor letters.