You are viewing a plain text version of this content. The canonical link for it is here.
Posted to user@cassandra.apache.org by Carlos Sanchez <ca...@riskmetrics.com> on 2010/04/23 00:29:12 UTC
Row deletion and get_range_slices (cassandra 0.6.1)
I have a curious question..
I am doing some testing where I insert 500 rows to a super column family and then delete one row, I make sure the row was indeed deleted (NotFoundException in the get call) and then I ran a get_range_slices and the row indeed returned. The shutdown Cassandra and restarted it. I repeated the test (with inserting the rows) and even though I get the NotFoundException for that row, the get_rance_slices still returns it. Is this the expected behavior? How long should I wait before I don't see the row in the get_range_slices? Do I have to force a flush or change consistency level?
Thanks,
Carlos
This email message and any attachments are for the sole use of the intended recipients and may contain proprietary and/or confidential information which may be privileged or otherwise protected from disclosure. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not an intended recipient, please contact the sender by reply email and destroy the original message and any copies of the message as well as any attachments to the original message.
Re: Row deletion and get_range_slices (cassandra 0.6.1)
Posted by Jonathan Ellis <jb...@gmail.com>.
On Fri, Apr 23, 2010 at 3:53 AM, David Harrison
<da...@gmail.com> wrote:
> So I'm guessing that means compaction doesn't include purging of
> tombstone-d keys ?
Incorrect.
http://wiki.apache.org/cassandra/DistributedDeletes
http://wiki.apache.org/cassandra/MemtableSSTable
Re: Row deletion and get_range_slices (cassandra 0.6.1)
Posted by David Harrison <da...@gmail.com>.
So I'm guessing that means compaction doesn't include purging of
tombstone-d keys ? Is there any situation or maintenance process that
does ? (or are keys forever?)
On 23 April 2010 17:44, Ryan King <ry...@twitter.com> wrote:
> On Thu, Apr 22, 2010 at 8:24 PM, David Harrison
> <da...@gmail.com> wrote:
>> Do those tombstone-d keys ever get purged completely ? I've tried
>> shortening the GCGraceSeconds right down but they still don't get
>> cleaned up.
>
> The GCGraceSeconds will only apply when you compact data.
>
> -ryan
>
Re: Row deletion and get_range_slices (cassandra 0.6.1)
Posted by Ryan King <ry...@twitter.com>.
On Thu, Apr 22, 2010 at 8:24 PM, David Harrison
<da...@gmail.com> wrote:
> Do those tombstone-d keys ever get purged completely ? I've tried
> shortening the GCGraceSeconds right down but they still don't get
> cleaned up.
The GCGraceSeconds will only apply when you compact data.
-ryan
Re: Row deletion and get_range_slices (cassandra 0.6.1)
Posted by David Harrison <da...@gmail.com>.
Do those tombstone-d keys ever get purged completely ? I've tried
shortening the GCGraceSeconds right down but they still don't get
cleaned up.
On 23 April 2010 08:57, Jonathan Ellis <jb...@gmail.com> wrote:
> http://wiki.apache.org/cassandra/FAQ#range_ghosts
>
> On Thu, Apr 22, 2010 at 5:29 PM, Carlos Sanchez
> <ca...@riskmetrics.com> wrote:
>> I have a curious question..
>>
>> I am doing some testing where I insert 500 rows to a super column family and then delete one row, I make sure the row was indeed deleted (NotFoundException in the get call) and then I ran a get_range_slices and the row indeed returned. The shutdown Cassandra and restarted it. I repeated the test (with inserting the rows) and even though I get the NotFoundException for that row, the get_rance_slices still returns it. Is this the expected behavior? How long should I wait before I don't see the row in the get_range_slices? Do I have to force a flush or change consistency level?
>>
>> Thanks,
>>
>> Carlos
>>
>> This email message and any attachments are for the sole use of the intended recipients and may contain proprietary and/or confidential information which may be privileged or otherwise protected from disclosure. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not an intended recipient, please contact the sender by reply email and destroy the original message and any copies of the message as well as any attachments to the original message.
>>
>
Re: Row deletion and get_range_slices (cassandra 0.6.1)
Posted by Jonathan Ellis <jb...@gmail.com>.
http://wiki.apache.org/cassandra/FAQ#range_ghosts
On Thu, Apr 22, 2010 at 5:29 PM, Carlos Sanchez
<ca...@riskmetrics.com> wrote:
> I have a curious question..
>
> I am doing some testing where I insert 500 rows to a super column family and then delete one row, I make sure the row was indeed deleted (NotFoundException in the get call) and then I ran a get_range_slices and the row indeed returned. The shutdown Cassandra and restarted it. I repeated the test (with inserting the rows) and even though I get the NotFoundException for that row, the get_rance_slices still returns it. Is this the expected behavior? How long should I wait before I don't see the row in the get_range_slices? Do I have to force a flush or change consistency level?
>
> Thanks,
>
> Carlos
>
> This email message and any attachments are for the sole use of the intended recipients and may contain proprietary and/or confidential information which may be privileged or otherwise protected from disclosure. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not an intended recipient, please contact the sender by reply email and destroy the original message and any copies of the message as well as any attachments to the original message.
>