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factorio-clusterio/plugins/subspace_storage/README.md
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# Clusterio Subspace Storage Plugin
Plugin for the [Subspace Storage mod](https://github.com/clusterio/subspace_storage).
## Installation
Run the following commands in the folder Clusterio is installed to:
npm install @clusterio/plugin-subspace_storage
npx clusteriocontroller plugin add @clusterio/plugin-subspace_storage
Substitute clusteriocontroller with clusteriohost or clusterioctl if this a dedicate host or ctl installation respectively.
## Controller Configuration
### subspace_storage.division_method
How to divide items between instances when there isn't enough in storage to give everyone what they ask for.
One of `simple`, `dole` or `neural_dole`.
With `simple` requests are served in full on a first come first served basis until the storage runs out.
With `dole` a per item division factor is kept that halves the amount handed out each time a request can't be met and slowly recovers when requests succeed, which spreads the remaining items between instances at the cost of draining the last of an item slowly.
`neural_dole` does the same with a small neural network estimating a fair share from the recent request history.
Defaults to `simple`.
### subspace_storage.log_item_transfers
Log every item transfer in and out of the storage to the controller console at verbose level.
Defaults to `false`.
## Instance Configuration
### subspace_storage.log_item_transfers
Log every item transfer in and out of the storage to the host console at verbose level.
Defaults to `false`.
## Development: inventory updates
The Node sender is in [instance.ts](instance.ts); the Factorio receiver is `UpdateInvData` in the separate mod repository's [src/control.lua](https://github.com/clusterio/subspace_storage/blob/master/src/control.lua).
Check both ends when changing inventory synchronization.
Each entry is `[name, count, quality]` and replaces the absolute count for that name/quality pair; it is not an amount to add or subtract.
With `full=true`, the receiver clears the previous inventory before applying entries, so an empty full snapshot clears all old state.
Without `full=true`, entries update only the listed pairs; omitted pairs retain their previous values, and an explicit zero records a zero count.
A new or restarted instance needs a complete snapshot before incremental updates.
Keep a complete inventory cache separate from any latest-delta cache: one delta is not enough to initialize a new receiver, and changes across several update windows must not overwrite each other before delivery.
Verify empty snapshots, zero counts, multiple qualities, and consecutive deltas when changing this path.