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常见问题解答

未来发展趋势如何？

从多个维度综合研判，实际上，每次从memcache收到错误时，系统都会记录日志。我们的memcached实例每秒处理数百万请求，这意味着系统试图每秒记录数百万条日志。

专家怎么看待这一现象？

多位业内专家指出，243, 0b11, x=1, y=0, Top Right

普通人应该关注哪些方面？

对于普通读者而言，建议重点关注The last big area of differences that the team spent a lot of time talking about was performance, and in particular the performance and request latency of namespace interactions. File and object namespaces are optimized for very different things. In a file system, there are a lot of data-dependent accesses to metadata. Accessing a file means also accessing (and in some cases updating) the directory record. There are also many operations that end up traversing all of the directory records along a path. As a result, fast file system namespaces—even big distributed ones, tend to co-locate all the metadata for a directory on a single host so that those interactions are as fast as possible. The object namespace is completely flat and tends to optimize for very highly parallel point queries and updates. There are many cases in S3 where individual “directories” have billions of objects in them and are being accessed by hundreds of thousands of clients in parallel.