20 Jul
2020
20 Jul
'20
7:38 a.m.
On Monday 20 of July 2020 02:40:48 Mike Bird wrote:
Cheers
--
Slávek
On Sun July 19 2020 17:12:12 Slávek Banko wrote:
For use in the redirector, it will be important if all accessible backends
are updated - ie "green" status. If any of the backends is inaccessible,
this is not an obstacle for use with the redirector.
For detailed information suitable for diagnostics, in addition to the
summary status, the status of individual backends could also be listed
there. Instead of the summary "partial", a real state could be seen.
For information, the redirector uses a special page mode to find usable
mirrors, where it gets a plain list of usable urls - mirrors that are not
ready are not listed:
https://www.trinitydesktop.org/mirrorstatus.php?mr
I'm afraid that will require a slightly more
complex solution.
Redirector selects the mirror primarily based on GeoIP information.
Therefore, it is very likely that in the current configuration, the
same backend will be selected repeatedly in the case of
MirrorService.org (in case both urls are accessible and updated). And
that would make it impossible to use a balancer on the
MirrorService.org side.
I would imagine that is OK as we are but a tiny portion of Tim's
traffic.
The important thing is not to redirect user requests for 2,000 newish
files to a server that does not have them yet.
The ideal solution would probably be to add the
"base URL" and
"backend URLs" option to the mirror configuration. A "base URL"
would
be used for address listing and redirection. To test the usability of
the mirror, all available "backend URLs" would then be tested and the
overall status of the mirror would be determined by whether at least
one "backend URL" is accessible and at the same time whether all of
the accessible "backend URLs" are updated.
Maybe some kind of "partial" status on the web page if some but not all
backends are up?
What is your
opinion on this idea? This should ensure reliable
operation for use with the redirector, while allowing proper use of
the balancer on the MirrorService.org side.
Sounds great to me. Let's see what Tim B thinks.
--Mike