Tomorrow, Wednesday July 14th, we are planning on publishing a brand new main.cvd and daily.cvd, as we do periodically to move more of the long term signatures into the main.cvd and make the daily.cvd smaller again.
This will have an impact on your downloads of these files (as every ClamAV instance will have to re-download both files), so you may see a spike in your bandwidth usage.
We will monitor the situation on the mirror side and make any adjustments necessary, but we anticipate no issues.