Hi,
We looking for solution for same problem. We have a wide column family with counters and we want to delete old data like 1 months old. One of potential ideas was to implement hook in compaction code and drop column which we don't need. Is this a viable option? Thanks, Ilya From: aaron morton [mailto:aa...@thelastpickle.com] Sent: Tuesday, February 12, 2013 9:01 AM To: user@cassandra.apache.org Subject: Re: Deleting old items So is it possible to delete all the data inserted in some CF between 2 dates or data older than 1 month ? No. You need to issue row level deletes. If you don't know the row key you'll need to do range scans to locate them. If you are deleting parts of wide rows consider reducing the min_compaction_level_threshold on the CF to 2 Cheers ----------------- Aaron Morton Freelance Cassandra Developer New Zealand @aaronmorton http://www.thelastpickle.com On 12/02/2013, at 4:21 AM, Alain RODRIGUEZ <arodr...@gmail.com> wrote: Hi, I would like to know if there is a way to delete old/unused data easily ? I know about TTL but there are 2 limitations of TTL: - AFAIK, there is no TTL on counter columns - TTL need to be defined at write time, so it's too late for data already inserted. I also could use a standard "delete" but it seems inappropriate for such a massive. In some cases, I don't know the row key and would like to delete all the rows starting by, let's say, "1050#..." Even better, I understood that columns are always inserted in C* with (name, value, timestamp). So is it possible to delete all the data inserted in some CF between 2 dates or data older than 1 month ? Alain
