Virtual Disks, aka persistent data, are SSD storage disks used to store data that is not part of your build, which you need to keep between restarts or new builds of your application. Every app gets 5GB free disk space usable as virtual disks.
Note that all data inside a container gets wiped out each time your application restarts. So if your app collects data from users, like photos and other media, and doesn’t use an external storage solution, like Amazon S3, a virtual disk is required to keep the data persistent.
Virtual Disks backups are completed every day between Midnight (12:00 AM) and 2 AM EST time (New York, USA time). The backups get carried out with ransomware mitigation, and you have access to it for the next 10 days after the backup is complete.
The daily backups are free, no matter the size of your disk.
Each ‘instance’ type includes a 5GB free disk space but, the ephemeral disk space used by the container itself (build image, temporary data, logs) is not within this limit but gets whipped out every time the app restart and at least once a day.
Each node gets 5GB free virtual disk space. Each additional GB used is billed at $0.016/GB/hour which is approximately $0.50/GB/month.
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