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Add missing word in cache write through discussion (#245)
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Donne Martin

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@@ -1218,7 +1218,7 @@ Write-through is a slow overall operation due to the write operation, but subseq
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##### Disadvantage(s): write through
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* When a new node is created due to failure or scaling, the new node will not cache entries until the entry is updated in the database. Cache-aside in conjunction with write through can mitigate this issue.
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* Most data written might never read, which can be minimized with a TTL.
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* Most data written might never be read, which can be minimized with a TTL.
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#### Write-behind (write-back)
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