问是否可以在没有ACID数据库的情况下拥有事务(就数据一致性而言)？

EN

# creating the resource, take a look on _version field
# POST test/resources/42
{
  "_index": "test",
  "_type": "resources",
  "_id": "42",
  "_version": 1,
  "result": "created",
  "_shards": {
    "total": 1,
    "successful": 1,
    "failed": 0
  },
  "created": true
}

# reading the resource    
# GET test/resources/1
{
  "_index": "test",
  "_type": "resources",
  "_id": "1",
  "_version": 1,
  "found": true,
  "_source": {
    "value": 1
  }
}

# service number 1 trying to update the resource using version in url
# POST test/resources/1?version=1
# {...} 
# response has new version
{
  "_index": "test",
  "_type": "resources",
  "_id": "1",
  "_version": 2,
  "result": "updated",
  "_shards": {
    "total": 1,
    "successful": 1,
    "failed": 0
  },
  "created": false
}

# service number 1 trying to update the resource -- fails
# POST test/resources/1?version=1
# {...}
{
  "error": {
    "root_cause": [
      {
        "type": "version_conflict_engine_exception",
        "reason": "[resources][1]: version conflict, current version [2] is different than the one provided [1]",
        "index_uuid": "nQcwn90wQ9WauH9ySC7qEw",
        "shard": "3",
        "index": "test"
      }
    ],
    "type": "version_conflict_engine_exception",
    "reason": "[resources][1]: version conflict, current version [2] is different than the one provided [1]",
    "index_uuid": "nQcwn90wQ9WauH9ySC7qEw",
    "shard": "3",
    "index": "test"
  },
  "status": 409
}