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Software · L3 · Choosing a Caching Strategy

A decision flow from the read/write pattern of the data to the caching strategy best suited to it.

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Characterize the access patternRead-heavy, rarely re-read after write?Write-around + cache-aside on readCan reads tolerate brief staleness?Write-backWrite-throughCache is full: which entry to evict?LRU evictionLFU evictionYesNoYes, for lower write latencyNo, must always be freshRecency matters mostLong-term popularity matters most

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