I am trying to set up 2 clients with both using the same block directory is this possible?

1 Answer 1


bitcoin-cli simply acts as a convenience interface to the JSON-RPC api of bitcoind - as long as you only have one instance of bitcoind using a given datadir, you can safely use multiple bitcoin-cli calls at the same time.

  • 3
    Right, though beware of the maximum number of concurrent calls (4 by default, adjustable with-rpcthreads). bitcoind will ignore any calls made above this limit. May 14, 2020 at 10:05
  • Does this mean that by default only 4 bitcoin-cli can ever use the same blocksdir or only 4 at a time?
    – Harmalarm
    May 14, 2020 at 19:51

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