SLA: design in São Paulo (GRU) · S-01

Runbook S-01 for SLA in São Paulo (GRU). Marker xserv-s-230809fbfa30. This page covers design for LATAM operators, not a worldwide average.

SLA: Why it matters on this continent

Design for SLA on letter S starts in São Paulo (GRU). Runbook s-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.

SLA: How XServ runs it day to day

Probes for SLA (s-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.

SLA: What operators should measure

Policy for SLA is versioned as s-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.

SLA handoff S-05

Handoff from letter S SLA into the rest of the platform uses the same request IDs as the gateway. Runbook s-05 names who accepts the ticket after São Paulo pages out. Santiago does not silently inherit the incident.

SLA rollback S-06

Rollback for s-06 is a documented command, not a hope. Transit is billed as backup while SLA prefers peering in Santiago. If cost spikes, the runbook cuts overflow to Bogotá before touching customer prefixes.

SLA peering S-07

Peering for SLA (s-07) prefers the IX fabric that already carries last-mile ISPs in Bogotá. Session counts and prefix limits are on the same page as the Miami backup path.

SLA cache S-08

Cache rules for SLA on s-08 keep language-correct objects near Miami. São Paulo is a sibling cache, not an origin. TTLs are short enough that a bad asset does not live through a weekend.