What happens with AppStream session in case of instance failure
I'm in the developing phase of an AppStream application. My team is wondering if there are any guardrails for session users in case of an instance failure. What happens to users' data in that case? Is the data retrievable? Will the instance be automatically replaced with the new one with users' data? Those are relevant questions that a potential end-user might ask when working with delicate and time-consuming workloads, but I wasn't able to find any answers in AppStream documentation.
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AppStream 2.0 is a non-persistent application and desktop streaming solution. If you don't have persistent storage for your users, anything they save locally will be lost when their session ends.
There are a number of built in options for persistent storage like Home folders, Google Drive and OneDrive. You can also uses file servers like Amazon FSx (Windows fleets) or Amazon EFS (Linux fleets).
If a fleet instance fails, the user will loose anything not saved in persistent storage. You should design your fleets so they use multiple availability zones. The user would start a new session and get a brand new instance.
Whether the user ends the session intentionally, or the session is ended through some other failure, if you're not utilizing Home Folders or any other means of persisting user data, the data is lost along with the fleet instance.
