Both of those things are done as well.  

Sent from my  iPhone

> On Dec 13, 2020, at 19:24, Dave Warren via clamav-users 
> <clamav-users@lists.clamav.net> wrote:
> 
> On 2020-12-11 08:51, Paul Kosinski via clamav-users wrote:
>> "The whole CVD filename is not versioned (always "daily.cvd") which is
>> why the CloudFlare caching issue may result in serving the previous
>> version."
>> HTML filenames for Web pages are not versioned either. Does this mean
>> that CDNs like Cloudflare often serve up obsolete Web pages? If so, does
>> nobody notice (and complain)?
>> A delay of an hour could have an adverse effect on online commerce,
>> especially during the busy holiday season.
> 
> By default Cloudflare does not cache HTML. Cloudflare also respects 
> cache-control headers, which is the normal mechanism used for websites which 
> want caching, but only to a point.
> 
> Cloudflare also has an API to clear the cache (at least by URI, or 
> everything, and possibly more depending on the particular options offered by 
> your plan). But in practice clearing the cache is not completely reliable and 
> seems to be intended for cases where it is strictly needed and not for every 
> "I updated this file" situation. I have the impression that this applies when 
> using Cloudflare's tiered caching, my idle speculation wonders if perhaps 
> this is a timing issue, where server #1 clears the cache, processes a request 
> for the file which it obtains from server #2 all before server #2 clears the 
> file from cache and then processes a request by pulling it from server #1.
> 
> From a ClamAV perspective, one solution to solve this would be to call 
> daily.cvd?version=26013 -- Note that the underlying web server could ignore 
> the version parameter completely, but this would ensure that each Cloudflare 
> cache retrieves a fresh version of the file and negates the need to push a 
> cache clear message at all. If ClamAV's server serves an outdated version of 
> the file then it would still get cached, but this would defeat any caching 
> within Cloudflare for new versions as they're released.
> 
> 
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