CC'ing your comments over to Micah.  We have a heavy freshclam rewrite in the 
pipeline.

The amount of people using ClamAV version 0.90 and below is surprising as well. 
 None of those versions support .diff files on the daily file.  So, those 
versions are downloading the whole daily.cvd (sometimes hundreds of times a 
day) even though those versions  of ClamAV won't work with the current options 
in daily.cvd, so they can't even start up. But Freshclam is still updating!



> On Aug 20, 2018, at 10:25 PM, Paul Kosinski <clamav-us...@iment.com> wrote:
> 
> It's good to save so much (5 PB) Internet traffic.
> 
> What we were seeing from our end was that there were a lot of full-size
> downloads of daily.cvd that were useless because they were the old
> version rather than the new version advertised by the DNS TXT record.
> 
> Besides being annoying because of lots of extra logging by freshclam,
> it kept killing off the mirror IP addresses due to the update failures,
> and thus eventually blocked all downloads.
> 
> Since we already had a wrapper around freshclam to do some extra stuff
> in our environment, I decided to write the extra code to only invoke
> freshclam if the prefix of the cvd file(s) showed the correct version.
> After that, it was easy to log the delay to separate file.
> 
> I guess my question at this point is: how many other users of freshclam
> are seeing the problem we had? The behavior we were seeing not only
> wasted bandwidth, it also caused semi-permanent blockage of future
> updates. Users who don't monitor their logs (like many desktop users?)
> could be far out of date with their ClamAV signatures.
> 
> P.S. It shouldn't be too hard to modify freshclam itself to deal with
> this problem in a similar fashion. But I didn't want to fork a fairly
> complicated program which mainly does stuff that has nothing to do with
> this particular problem.
> 
> 
> 
> On Mon, 20 Aug 2018 15:43:14 +0000
> "Joel Esler (jesler)" <jes...@cisco.com> wrote:
> 
>> Thank you.  We have to make adjustments very slowly to not disrupt
>> anyone.
>> 
>> Cloudflare has helped us save 2 PB in the last month, delivering
>> updates an average of 39% faster.  We are seeing excellent results.  
>> 
>>> On Aug 18, 2018, at 1:09 AM, Paul Kosinski <clamav-us...@iment.com>
>>> wrote:
>>> 
>>> Joel,
>>> 
>>> Still lots of delays since "2018-08-11 13:18:02  No delay", but none
>>> quite as long as the previous batch:
>>> 
>>> 2018-08-11 21:33:02  00:15:00 delay
>>> 2018-08-12 05:48:02  01:00:00 delay
>>> 2018-08-12 14:33:01  01:15:00 delay
>>> 2018-08-12 22:48:02  01:00:00 delay
>>> 2018-08-13 05:18:01  No delay
>>> 2018-08-13 13:18:02  No delay
>>> 2018-08-13 21:33:01  00:14:59 delay
>>> 2018-08-14 05:18:01  No delay
>>> 2018-08-14 13:18:02  No delay
>>> 2018-08-14 21:33:02  00:30:01 delay
>>> 2018-08-15 05:03:02  No delay
>>> 2018-08-15 13:48:01  00:45:00 delay
>>> 2018-08-15 22:03:01  No delay
>>> 2018-08-16 05:03:02  No delay
>>> 2018-08-16 14:03:02  01:00:01 delay
>>> 2018-08-16 21:18:01  00:14:59 delay
>>> 2018-08-17 06:03:01  No delay
>>> 2018-08-17 13:33:02  00:30:01 delay
>>> 2018-08-17 21:03:02  No delay
>>> 
>>> 
>>> On Thu, 16 Aug 2018 22:13:48 +0000
>>> "Joel Esler (jesler)" <jes...@cisco.com> wrote:
>>> 
>>>> Paul, how are things looking from your side?
> 
>> 
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