FBR: Change to category based crawling

[Adrian Reber]

As discussed previously I would like to change the crawler to crawl each
category separately. The goal is to reduce the load on the database by
distributing the crawling better over the whole day and to reduce the
chance of mirrors being disabled because of the high database load.

This should also remove the need for mirror administrators to create
multiple hosts in MirrorManager to work around the 4 hours timeout per
host.

Attached is my patch. Please +1. This affects mm-crawler01 and
mm-crawler02.

		Adrian

[Kevin Fenzi]

+1

kevin

[Stephen John Smoogen]

+1

On 19 April 2018 at 02:54, Adrian Reber <adrian(a)lisas.de&gt; wrote:
>  As discussed previously I would like to change the crawler to crawl
> each
>  category separately. The goal is to reduce the load on the database by
>  distributing the crawling better over the whole day and to reduce the
>  chance of mirrors being disabled because of the high database load.
>
>  This should also remove the need for mirror administrators to create
>  multiple hosts in MirrorManager to work around the 4 hours timeout per
>  host.
>
>  Attached is my patch. Please +1. This affects mm-crawler01 and
>  mm-crawler02.
>
>                  Adrian
>
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>  


-- 
Stephen J Smoogen.

[Adrian Reber]

On Thu, Apr 19, 2018 at 08:54:21AM +0200, Adrian Reber wrote:
>  As discussed previously I would like to change the crawler to crawl
> each
>  category separately. The goal is to reduce the load on the database by
>  distributing the crawling better over the whole day and to reduce the
>  chance of mirrors being disabled because of the high database load.
>  
>  This should also remove the need for mirror administrators to create
>  multiple hosts in MirrorManager to work around the 4 hours timeout per
>  host.
>  
>  Attached is my patch. Please +1. This affects mm-crawler01 and
>  mm-crawler02. 
Thanks for the '+1's. This change is active since yesterday and so far
it seems to work. If we still see hosts timing out, especially when
crawling the archive hosts, we can increase the timeout for archive
crawling to 6 hours. Another option to decrease the number of wrongly
auto-deactivated mirrors is to increase CRAWLER_AUTO_DISABLE from 4 to 6
or 8 crawls.

I will look at those changes after the freeze.

		Adrian

[Adrian Reber]

On Thu, Apr 19, 2018 at 08:54:21AM +0200, Adrian Reber wrote:
>  As discussed previously I would like to change the crawler to crawl
> each
>  category separately. The goal is to reduce the load on the database by
>  distributing the crawling better over the whole day and to reduce the
>  chance of mirrors being disabled because of the high database load.
>  
>  This should also remove the need for mirror administrators to create
>  multiple hosts in MirrorManager to work around the 4 hours timeout per
>  host. 
On the mirror-admin mailing list there have been reports that mirrors
are no longer part of the mirrorlist/metalink.

With the switch to category based crawling a bug in the crawler was
uncovered:

https://github.com/fedora-infra/mirrormanager2/issues/249

It is fixed and the crawler should now mark directories correctly during
crawl.

		Adrian