In Mongo, when using w: 1 in a write concern, the write operation is acknowledged after being successfully applied to the primary's instance memory. However, w: 1 alone does not guarantee durability unless combined with j: true (journaling). Running standalone Mongo, as we did in the tests, defaults to j: false. I have explicitly set it to true in the testing script to make write comparisons to Postgres objective. You can dive deeper into this here: https://www.mongodb.com/docs/manual/reference/write-concern/#acknowledgment-behavior and here: https://www.mongodb.com/docs/manual/core/journaling/. Unfortunately, docs are a bit convoluted about it
Артем Соколов (Редактор отдела «Силовые структуры»)
。电影是该领域的重要参考
A decisive victory for the Elephant - 30 018 QPS vs 22 126 QPS throughput, 1.36x better; it also delivers significantly lower latency.
Артем Соколов (Редактор отдела «Силовые структуры»)，详情可参考电影
Local road conditions, traffic patterns, and edge cases are all analyzed and mapped out so that the autonomous vehicles are prepared for the location. After months of testing, Waymo will start testing the driverless version of the service. If all goes well, this will be followed by launching the full Waymo experience — where you hail a driverless car on the Waymo app — in the city.，这一点在服务器推荐中也有详细论述
Фото: Министерство обороны / «Лента.ру»