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Red Hat → Google
，详情可参考体育直播
Surviving SQS and building B-link Trees on S3As mentioned above, to bypass the severe latency of writing full data pages directly to S3, clients commit transactions by shipping small redo log records to SQS queues. Subsequently, clients act as checkpointers, asynchronously pulling these queued logs and applying the updates to their local copies before writing the newly materialized B-tree pages back to S3. This asynchronous log-shipping model means B-tree pages on S3 can be arbitrarily out-of-date compared to the real-time logs in SQS. Working on such stale state seems impossible, but the authors bound the staleness: writers (and probabilistically readers) run asynchronous checkpoints that pull batches of logs from SQS and apply them to S3, keeping the database consistent despite delays.
近日重读钱锺书的《七缀集》，因序言里的一句感慨而引发联想。作者说：“我国读者似乎有个习惯，买不到书，就向常常无能为力的作者本人写信诉苦。”这的确是写作者的一种苦恼，因为无能为力，这种苦恼又会变成一种烦恼。然而，对今天的绝大多数写作者而言，这样的烦恼又何尝不是带着一丝甜蜜甚至一点“傲娇”。当下，写作的环境变了，阅读的环境变化更大，任何人只要有一部手机就几乎可以得到想要的任何书，出版、写作、阅读的供需关系发生了复杂的变化。很难想象今天还会有读者想办法联系作者，希望买书，或希望作者尽快出书。从前的烦恼差不多就是一种佳话。
Ukraine has pioneered the development of cut-price drone killers that cost as little as $1,000, rewriting the air defense rule book and making other countries take notice.