Linked by Thom Holwerda on Mon 7th Aug 2017 20:16 UTC

When you get that "out of space" error message during an update, you're only "out of space" on the user storage partition, which is just being used as a temporary download spot before the update is applied to the system partition. Starting with Android 8.0, the A/B system partition setup is being upgraded with a "streaming updates" feature. Update data will arrive from the Internet directly to the offline system partition, written block by block, in a ready-to-boot state. Instead of needing ~1GB of free space, Google will be bypassing user storage almost entirely, needing only ~100KB worth of free space for some metadata.

I promise not to make some snide remark about Android's update mess.

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RE: Comment by grandmasterphp
by cacheline on Tue 8th Aug 2017 01:18 UTC in reply to "Comment by grandmasterphp"
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In a way, I could see that. But, it sounds more like they're just marking a portion of your free space as reserved, so in reality, it's not free to user apps or the system for storing data, cache, etc.

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