这段时间在做个社区系统，发现用户头像是随处可见的如果通过用户ID去数据库查询，查询太频繁了，有人知道sf的头像存储和读取是怎么实现的吗？
头像地址
http://sfault-avatar.b0.upaiyun.com/377/866/3778663381-1030000000092007_huge128
http://sfault-avatar.b0.upaiyun.com/ ：图片域名地址
1030000000092007 用户ID
huge128 尺寸
3778663381是什么？随机数？
377/866通过这个数生成的目录
在读取用户头像的时候是怎么读取的，通过规则来拼接地址，还是直接根据用户ID去数据库读取用户头像的地址？
回复内容：
这段时间在做个社区系统，发现用户头像是随处可见的如果通过用户ID去数据库查询，查询太频繁了，有人知道sf的头像存储和读取是怎么实现的吗？
头像地址
http://sfault-avatar.b0.upaiyun.com/377/866/3778663381-1030000000092007_huge128
http://sfault-avatar.b0.upaiyun.com/ ：图片域名地址
1030000000092007 用户ID
huge128 尺寸
3778663381是什么？随机数？
377/866通过这个数生成的目录
在读取用户头像的时候是怎么读取的，通过规则来拼接地址，还是直接根据用户ID去数据库读取用户头像的地址？
去看看又拍云的文档。
用户名和id也是随处可见的，也需要频繁查询（无论存储在mysql或是别的kvdb里）。
有了用户名和id，生成一个唯一的图片名不是轻而易举。
SF的头像地址每个用户是固定的，中间的用户ID，前边的目前还不知道是什么。
不过肯定不会是是从数据库读取的，效率太低。应该是根据某种算法生成的地址，不管怎么上传头像也会是同一地址。
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