Handle non existing redis keys

[dysonfrost]

This PR is for the handling of redis keys which are not present while a dump is in progress.

[Bertg]

Approved

@dysonfrost Is there a readson why we do our backup with this type of script, instead of using the SAVE and RESTORE . I understand, i guess its becaause this DB is manged, and so we can't take the backup.

Wouldn't it hen - maybe - make more sense to just use the backups of digital ocean themselves?

[dysonfrost]

Approved

@dysonfrost Is there a readson why we do our backup with this type of script, instead of using the SAVE and RESTORE . I understand, i guess its becaause this DB is manged, and so we can't take the backup.

Wouldn't it hen - maybe - make more sense to just use the backups of digital ocean themselves?

that's correct, however DigitalOcean doesn't provide an adhoc mechanism to restore from backup with Redis.