关于hash分片计算方法，请赐教

单实例下，现有128个分库，8039709005，5907536637 这两个字符串，我用他们的hashcode取值后，对1024取模，结果是543，-383。怎么算也不在一个库里。请教下，字符串是怎么计算分片的

No file, test, or entry point is named in the issue. Start by locating Cobar's hash-based sharding algorithm and its configuration or documentation, then trace how the two supplied strings are converted and mapped with 1024 buckets. Done means explaining why the two values do or do not map to the same database.

Written by the indexing model from the issue text.