# 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/pylfh5q
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如何實現多級緩存？**
對於高併發系統來說，有三個重要的機制來保障其高效運行，它們分別是：緩存、限流和熔斷。而緩存是排在最前面也是高併發系統之所以高效運行的關鍵手段，那麼問題來了：緩存只使用 Redis 就夠了嗎？冗餘設計理念---------當然不是，不要把所有雞蛋放到一個籃子裏，成熟的系統在關鍵功能實現時一定會考慮冗餘設計，注意這裏的冗餘設計不是貶義詞。 “ 冗餘設計是在系統或設備完成任務起關鍵作用的地方，增 ⌘ Read more