Category Archives: Cassandra

Reddit 在處理 Page View 的方式

Reddit 說明了他們如何處理 pageview:「View Counting at Reddit」。 以 Reddit 的規模有提到兩個重點,第一個在善用 Redis 的 HyperLogLog 這個資料結構,當量大的時候其實可以允許有微小的誤差: The amount of memory varies per implementation, but in the case of this implementation, we could count over 1 million IDs using just 12 kilobytes of space, … Continue reading

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ScyllaDB 1.7 支援 Counters 了

在「Scylla release: version 1.7」這邊看到 ScyllaDB 支援 Counters 的消息了 (雖然剛出來,掛著 Experimental 的消息): Scylla now supports Counters as a native type. A counter column is a column whose value is a 64-bit signed integer and on which two operations are supported: incrementing … Continue reading

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