 {
    "action_id": "action.launch.alltoall.aiv.rank0.block0.a00334",
    "kind": "urma_write",
    "resource": "urma_engine",
    "rank_id": 0,
    "peer_rank": 1,
    "bytes": 256,
    "reads": [
      {
        "region_id": "memory.ccl_in.rank0",
        "owner_rank": 0,
        "byte_offset": 2097408,
        "bytes": 256
      }
    ],
    "writes": [
      {
        "region_id": "memory.ccl_out.rank1",
        "owner_rank": 1,
        "byte_offset": 2097152,
        "bytes": 256
      }
    ],
    "attributes": {
      "control": 387,
      "opcode": 3,
      "message_length": 256,
      "sge_length": 256,
      "lkey": 4097,
      "rkey": 8194,
      "local_va": 5370806528,
      "remote_va": 6176112640,
      "queue_index": 1,
      "slot_index": 0,
      "wqe_byte_offset": 512,
      "transport_verb": "write"
    }
  }
