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Remove the bom (Mumbai) region - #2508

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remove-bom-region
Sep 25, 2026
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Lillian asked for bom to come out of the docs. Customers running there have already been told, so these are deletions rather than deprecation notices. Closes superfly/docs-tracking#316.

Four files, five edits:

  • reference/regions.mdx, the table row
  • snippets/RegionPricingSelector.jsx, the pricing selector entry
  • machines/guides-examples/machine-placement.mdx, the list of region codes and the "regions in high demand" example
  • reference/load-balancing.mdx, which needed rework rather than trimming

On the load balancing example. It deployed 10 Machines across ams, bom, sea and sin, and every figure in the walkthrough depends on three Machines being in ams and ten in total, not on which the other three regions are. 60 is three at the soft limit, 200 is ten at the soft limit, 250 is ten at the hard limit.

So bom and sea are replaced with nrt and sjc, the counts are untouched, and no number in the walkthrough changes. sea went because it is not in the regions table and has not been for some time, so the example was already naming a region that does not exist.

Left alone on purpose. app-guides/minio.mdx names bom and maa inside a quoted fly launch output block. Editing it would misreport what the tool prints, the same reasoning applied to the flyctl URLs in #2502 and the --volume-size description in #2488. maa appearing there is itself evidence that the block is old output.

Verified. The docs regions table, the docs pricing selector and FlyioPriceCalc.Regions in superfly/ui-ex now list an identical 17 regions. Before this they disagreed on bom, which fly.io/pricing had already dropped, so the two pricing pages were showing different regions.

One thing I did not fix, and it predates this. The load balancing walkthrough jumps from "61+ concurrent requests, the proxy does not route to other regions on soft limits alone" straight to "200+, all Machines are at their soft limit". It never says what happens at 75, where the three ams Machines hit their hard limit and traffic must start reaching the other seven. Worth a separate look by someone who can confirm the proxy behavior.

Lillian asked for bom to come out of the docs. Customers running there
have already been told, so these are deletions rather than deprecation
notices.

Five edits. The regions table row, the pricing selector entry, the
region code list on the Machine placement page, and the high-demand
example on the same page.

The load balancing example needed rework rather than trimming. It
deployed 10 Machines across ams, bom, sea and sin, and the walkthrough
depends on three of them being in ams and ten in total, not on which the
other three regions are. Also sea is not in the regions table and has
not been for some time, so both it and bom are replaced with nrt and
sjc. The counts and every figure in the walkthrough are unchanged.

Left alone: app-guides/minio.mdx names bom and maa inside quoted
fly launch output. Editing that would misreport what the tool prints.
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@kcmartin
kcmartin merged commit ef91a86 into main Sep 25, 2026
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kcmartin deleted the remove-bom-region branch September 25, 2026 22:07

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