As long as you have enough space in the host, other applications won’t notice Other applications shouldn’t need to know about that folder. The limitation is only applied to the target folder, and it’s only known to the application. You don’t bother other applications and services.This means that the target folder will have contents up to reaching those 50MB. The key point is that tmpfs allows us to control the size of the FS. This is mainly to ensure that each piece writing in the disk can handle the error properly Depending on how the application writes into the storage, you might need different mounts: one for the logs, one for uploaded assets, one for uploaded certificates, etc. We expect the application to write everything inside that folder. The main trick we’re going to use is to mount a tmpfs FS in a specific folder. Obviously, the mobile app needs to handle that error. The server needs to cleanup everything after the failed operation (metadata that could remain assuming the operation succeeded), and it also needs to ensure the client receives an appropriate error. For example, a mobile app can upload a file to your server, but the server might not have enough space. This isn’t just a matter for your server application, but to any client that your application could have. Even if you control the available disk space, you might need to do something when you’re under 10% of disk space. ![]() You might get an error about insufficient space on disk at any time. Why do we need to test with a size-limited storage?Īs said, you can’t really trust that your application will have an unlimited storage size. Moreover, cloud-based deployments might impose quotas, limiting your effective storage to 10GB unless you pay for more. ![]() In addition, other apps will take disk space, so your remaining size could be reduced to less than a half. A big file could use 50GB or even more, and you’ll likely need to store a bunch of them. ![]() However, if you work with big files, you won’t be able to keep the disk usage under normal constraints. You’re sure the application won’t use more than 5GB of disk space. Normally you don’t have to worry about lacking disk space, but depending on the application you’re developing you might fill the storage at some point.įor example, if you have to manage information about a maximum of 50 users, as long as you have enough space, the size it takes on disk will remain stable. You can easily have storages with 1TB and you usually can expand the storage somehow. You consider storages to have an unlimited size. Did you ever have problems regarding the size of your storage? If you use docker in your daily life, either for deployment or simply for testing, let’s see how you can reproduce these problems with the storage.
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