Tom, Old cells will get deleted as a part of the next major compaction, which is typically recommended to be done once a day, when the load on the system is at its lowest.
FWIW… To have a TTL of 3600 take effect, you'll have to do a major compaction every hour, which is an expensive operation specially at scale. Chances are that your I/O loads will shoot up and latencies will spike for operations to HBase. Can you tell us why a TTL of 3600s is of interest? What are your access patterns? -Amandeep On Friday, June 1, 2012 at 3:59 PM, Tom Brown wrote: > I have a table that holds rotating data. It has a TTL of 3600. For > some reason, when I scan the table I still get old cells that are much > older than that TTL. > > I have tried issuing a compaction request via the web UI, but that > didn't seem to do anything. > > Am I misunderstanding the data model used by HBase? Is there anything > else I can check to verify the functionality of my integration? > > I am using HBase 0.92 with Hadoop 1.0.2. > > Thanks in advance! > > --Tom
