incubator-cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Sylvain Lebresne <sylv...@datastax.com>
Subject Re: time to live rows
Date Tue, 08 Feb 2011 15:52:44 GMT
> So the empty row will be ultimately removed then? Is there a way to
> for the GC to verify this?
>

Set a GcGraceSecond very low and force a major compaction.


>
> Thanks,
> -Kal
>
> On Tue, Feb 8, 2011 at 2:21 AM, Stu Hood <stuhood@gmail.com> wrote:
> > The expired columns were converted into tombstones, which will live for
> the
> > GC timeout. The "empty" row will be cleaned up when those tombstones are
> > removed.
> > Returning the empty row is unfortunate... we'd love to find a more
> > appropriate solution that might not involve endless scanning.
> > See
> > http://wiki.apache.org/cassandra/FAQ#i_deleted_what_gives
> > http://wiki.apache.org/cassandra/FAQ#range_ghosts
> >
> > On Mon, Feb 7, 2011 at 1:49 PM, Kallin Nagelberg
> > <kallin.nagelberg@gmail.com> wrote:
> >>
> >> I also tried forcing a major compaction on the column family using JMX
> >> but the row remains.
> >>
> >> On Mon, Feb 7, 2011 at 4:43 PM, Kallin Nagelberg
> >> <kallin.nagelberg@gmail.com> wrote:
> >> > I tried that but I still see the row coming back on a list
> >> > <columnfamily> in the CLI. My concern is that there will be a pointer
> >> > to an empty row for all eternity.
> >> >
> >> > -Kal
> >> >
> >> > On Mon, Feb 7, 2011 at 4:38 PM, Aaron Morton <aaron@thelastpickle.com
> >
> >> > wrote:
> >> >> Deleting all the columns in a row via TTL has the same affect as
> >> >> deleting th
> >> >> row, the data will physically by removed during compaction.
> >> >>
> >> >> Aaron
> >> >>
> >> >>
> >> >> On 08 Feb, 2011,at 10:24 AM, Bill Speirs <bill.speirs@gmail.com>
> wrote:
> >> >>
> >> >> I don't think this is supported (but I could be completely wrong).
> >> >> However, I'd love to see this functionality as well.
> >> >>
> >> >> How would one go about requesting such a feature?
> >> >>
> >> >> Bill-
> >> >>
> >> >> On Mon, Feb 7, 2011 at 4:15 PM, Kallin Nagelberg
> >> >> <kallin.nagelberg@gmail.com> wrote:
> >> >>> Hey,
> >> >>>
> >> >>> I have read about the new TTL columns in Cassandra 0.7. In my case
> I'd
> >> >>> like to expire an entire row automatically after a certain amount
of
> >> >>> time. Is this possible as well?
> >> >>>
> >> >>> Thanks,
> >> >>> -Kal
> >> >>>
> >> >>
> >> >
> >
> >
>

Mime
View raw message