EGI Application Database :: Wiki

Autocheck image file metadata integrity option is available on per image basis and if checked (default) it will command our system (upon verification - not upon saving) to temporarily download the image from the Location given, to our/AppDB servers, and calculate the sha512 checksum and the filesize. By following this option the user does not have to fill in the respective metadata values manually.

There are quite a few cases that this process could fail. For example:

• The image is not accessible neither over http nor https protocol (at the time being only http(s) protocol is supported).
• The source http server requires authentication
• The Location given was not found.
• etc..

One more thing that the user should be aware of, is the time needed for this process to be finalized. Downloading a couple of hundreds of data over http and calculate the sha512 checksum of the downloaded image file, could be considered as a time consuming process. Depending on the bandwidth of the network it could take from a few seconds up to a few tenths of minutes.