I know that 10% of node space allocation is the recommended reserve space for a node. However 10% of a 10TB drive, i.e. 1TB, is a lot more than 10% of a 1TB drive, i.e. 100GB. So how much is really needed to insure proper node operation or does it really vary by node size?
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I personally reserve about 100GB no matter the size of the drive. There is no technical reason for the 10% figure as far as I know, and I feel that 100GB should be more than enough space for databases, logs, and the rare case (i.e. bug) where the node could use space beyond it’s allocation.
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Does trash need to be accounted for in the reserve space?
no, unless there is a bug in the code.
The reserve is more for safety against the bugs in the code. Most of them are eliminated at this time, so maybe 100GB is a safe limit now. However, it doesn’t guarantee that we would not introduce a bug somewhere after a while.
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