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From Omer van der Horst Jansen <>
Subject get() with TTL update?
Date Mon, 24 May 2010 19:19:19 GMT
We have an application that stores session data in Cassandra. The
session data needs to be deleted after, say, one hour of inactivity. The
CASSANDRA-699 TTL update in 0.7 looks like it will work very well for

However, we have a few scenarios where some session data will be
retrieved frequently, but not be updated at all. In that scenario we
need to make sure that the TTL gets refreshed on each read. I'm
currently handling this by rewriting the entire column with a new
timestamp and TTL.

That seems a bit inefficient. Sometimes the column data can be several
megabytes in size, and the only things in the column that need to be
updated are the timestamp and the TTL.

Is there currently a way to just update the timestamp and TTL? If not,
would it make sense to update the get method and the associated internal
plumbing to allow for an optional TTL parameter?


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