Re: TerraSync CDN not responding

> On 23 Jun 2026, at 09:31, James Turner <[email protected]> wrote:
> 
> In the medium term we’re going to move the TerraSync source-of-truth to the same host as the CDN (Bunny,net) since this will be more flexible than Heliohost, for the same recurring cost.
> 
> The good news is Ibiblio exists as source-of-truth for FGaddon and downloads, the bad news is some people (including Chris) were using us1mirror as source-of-truth, *because I told them to*, but I think we’re at the point of considering Heliohost as best-effort, not something really reliable. (The web servers also seem to get stuck / fall over once per month, no idea why…)
> 
> So we’re /probably/ going to gradually wind down that server in the next few months in favour of other hosts, such as de3mirror (Hetzner).

The medium-term became the short-term: sometime later today, TerraSync should be back up and more reliable, since the upstream storage *and* the CDN are now running on the same infrastructure. (And a bunch of scalability concerns vanished, as well)

So we are ‘off’ HelioHost, but I do need to recreate download.flightgear.org <http://download.flightgear.org/> and update.flightgear.org <http://update.flightgear.org/> on Hetzner aka de3mirror. 

In the actual medium term, I’m going to look at using the same infra for FGaddon downloads: this should improve the end-user experience for aircraft installs/updates, but that will need to be trialed first, to check the costs are ok.

If you were previously syncing a mirror *from* us1mirror, please get in touch with me directly, since depending on what you’re mirroring, it may not make sense any more. (Anything on the CDN peers globally, from pretty well located data-centers, so custom mirrors only make sense for special use cases, but, that’s fine, if you have such a use case….). Which also brings us to one of the special cases:

We probably need tp replace the upstream for TerraMaster etc, since using the CDN for a ‘pull the whole world’ is inefficient and expensive. So converting one of the existing mirrors that has uncapped bandwidth into the official server for that, which we document in the wiki etc, is probably wise. Hearing what the typical use case is from people who work that way would help, since of course I am clueless about it.

(FYI the WS2 data set is 91GB and the OSM2City set is 137GB)

Kind regards,
James

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