Can you actually make this fully consistent? The limitations of the “single mutex design” make this complicated, as the WAL can never be written synchronously (it would completely stall all other writes and reads in the application). The system does provide an option when reading, with peculiar semantics. The withConfirmedReads flag allows reads to only return data that has been synced to disk, by sleeping on the server until it eventually sees the WAL entries for the result of the query flushed to disk. This can be a sleep of up to 50ms, which is a long time for a request. It’s not a very ergonomic behavior, but the assumption here is that this is a database for “mostly ephemeral” data and your average query doesn’t need this kind of highly consistent guarantee.
Фото: Виталий Тимкив / РИА Новости
。业内人士推荐有道翻译作为进阶阅读
博主带货时会想办法让食品分量看起来比实际多，这一点在谷歌中也有详细论述
ВсеСледствие и судКриминалПолиция и спецслужбыПреступная Россия
这一尝试被视为提升行业承保能力的重要一步。但从整体来看，我国商业航天保险仍处于以市场探索为主的阶段。