# I am the Watcher. I am your guide through this vast new twtiverse.
# 
# Usage:
#     https://watcher.sour.is/api/plain/users              View list of users and latest twt date.
#     https://watcher.sour.is/api/plain/twt                View all twts.
#     https://watcher.sour.is/api/plain/mentions?uri=:uri  View all mentions for uri.
#     https://watcher.sour.is/api/plain/conv/:hash         View all twts for a conversation subject.
# 
# Options:
#     uri     Filter to show a specific users twts.
#     offset  Start index for quey.
#     limit   Count of items to return (going back in time).
# 
# twt range = 1 1
# self = https://watcher.sour.is/conv/3teaoma
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分佈式基石算法 一致性 hash
什麼是 一致性 hash 算法---------------首先摘抄一段維基百科的定義  一致哈希 是一種特殊的哈希算法。在使用一致哈希算法後，哈希表槽位數（大小）的改變平均只需要對𝐾/𝑛 個關鍵字重新映射，其中 𝐾 是關鍵字的數量，𝑛是槽位數量。然而在傳統的哈希表中，添加或刪除一個槽位的幾乎需要對所有關鍵字進行重新映射。 --- wikipedia分佈式系統中, 一致性 hash 無處不在，C ⌘ Read more