memkeys:用 C++ 寫的 mctop (memcache top)

在「mctop:memcache top」介紹過由 Etsy 所開發的 memcache top 工具 mctop

這套軟體用 Ruby 寫,其實就是個 sniffer + packet analyzer,但這套軟體有效能問題。在流量很高的時候無法處理所有封包,而變成 sampling 類型的監控。

Tumblr 用 C++ 新寫了一個版本,叫做 memkeys。依照軟體的說明,在 1Gbps 滿載時 mctop 約 50% 到 75% 的 packet drop (sampling rate 約 25% 到 50%),而 memkeys 只有 3% packet drop (sampling rate 約 97%):「Open Source - Memcache Top」。

This was originally inspired by mctop from etsy. I found that under load mctop would drop between 50 and 75 percent of packets. Under the same load memkeys will typically drop less than 3 percent of packets. This is on a machine saturating a 1Gb network link.

效能好不少 :p

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One Response to memkeys:用 C++ 寫的 mctop (memcache top)

  1. Pingback: Memcache Top 安裝 | Tsung's Blog

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