What is a local_content table in Mnesia?

A local_content table is replicated in the sense that its schema exists on every listed node, but each node keeps its own independent data in it — writes on one node are never propagated to other nodes' copies, unlike a normal replicated table where every copy is meant to converge on the same content.

mnesia:create_table(node_stats,
    [{ram_copies, [node1@host, node2@host]},
     {local_content, true},
     {attributes, [metric, value]}]).

It's a way of using Mnesia's table/schema machinery for data that's genuinely node-specific by nature — per-node metrics, local caches, or node-specific logs — while still getting Mnesia's table management (starting, stopping, backup integration) for free, without the overhead or semantic mismatch of trying to keep genuinely different per-node data artificially "consistent" across replicas.

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