[Pulp-list] delayed download questions

[Jeremy Cline]

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On 02/06/2016 11:22 AM, Dennis Gregorovic wrote:
> Hi,
> 
> Just attended the Pulp talk at DevConf[0].  Kudos to Ina for that!
> 
> The delayed download feature was presented and I have a couple of
> questions.
> 
> * How does Pulp map the user-requested URL to a Pulp object for
> download?

The summary is that a requested URL maps to a unique storage path for
the file, and we keep a catalog of file -> upstream URLs.

More detailed documentation is available[0].

> * What happens if the downloaded file doesn't match the checksum in
> the pulp db for that content unit?

This depends. When a client requests the file, we stream it back to the
client as we receive it, so the client will get the corrupt file. Pulp,
however, will not save the unit permanently unless the checksum is
correct.

> * Likewise, what happens if Pulp downloader is unable to complete
> the download?

Whatever the reason, the client will receive the appropriate response
(HTTP 404, 403, etc). Beyond passing the upstream repository response to
the client, Pulp doesn't anything.

[0]
https://github.com/pulp/pulp/blob/master/docs/dev-guide/design/deferred-
download.rst

- -- 
Jeremy Cline
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