Are you sure your app is setting TTL correctly?
TTL is in seconds. For 90 days it have to be 90*24*60*60=7776000.
What If you set by accident 777600 (10 times less) - that will be 9 days, 
almost what you see.

Best regards / Pagarbiai
Viktor Jevdokimov
Senior Developer

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From: Matthias Zeilinger [mailto:matthias.zeilin...@bwinparty.com]
Sent: Monday, January 28, 2013 15:57
To: user@cassandra.apache.org
Subject: data not shown up after some time

Hi,

I´m a simple operations guy and new to Cassandra.
I have the problem that one of our application is writing data into Cassandra 
(but not deleting them, because we should have a 90 days TTL).
The application operates in 1 KS with 5 CF. my current setup:

3 node cluster and KS has a RF of 3 (I know it´s not the best setup)

I can see now the problem that after 10 days most (nearly all) data are not 
showing anymore in the cli and also our application cannot see the data.
I assume that it has something to do with the gc_grace_seconds, it is set to 10 
days.

I have read many documentations about tombstones, but our application doesn´t 
perform deletes.
How can I see in the cli, if I row key has any tombstone or not.

Could it be that there are some ghost tombstones?

Thx for your help

Br,
Matthias Zeilinger
Production Operation - Shared Services

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