Home | About | Sematext search-lucene.com search-hadoop.com
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB
 Search Hadoop and all its subprojects:

Switch to Threaded View
HBase >> mail # user >> Possible to delete a specific cell?


Copy link to this message
-
Re: Possible to delete a specific cell?
Today are you not going to delete t1 and t2 and keep t3? The marker
will delete everything older than t2 only, right?

To today we will keep only t3 but the idea is to keep also t1 if I
understand correctly.

2013/3/7 Kevin O'dell <[EMAIL PROTECTED]>:
> JM,
>
>   If you delete t2, you will also wipe out t3 right now.
>
> On Thu, Mar 7, 2013 at 1:37 PM, Jean-Marc Spaggiari <[EMAIL PROTECTED]
>> wrote:
>
>> Kevin,
>>
>> How do you see that? Like a specific cell format which can "cancel"
>> once timestamp and no delete all the previous one?
>>
>> Like before compaction we can have
>>
>> v1:t1
>> v1:t2
>> v1:t3
>> v1:d2 <= Delete only t2 version.
>>
>> And at compaction time we only keep that in mind and give this as a result:
>> v1:t1
>> v1:t3
>>
>> ?
>>
>> 2013/3/7 Jeff Kolesky <[EMAIL PROTECTED]>:
>> > Yes, this behavior would be fantastic.  If you follow the Kiji/Wibi model
>> > of using many versioned cells, being able to delete a specific cell
>> without
>> > deleting all cells prior to it would be very useful.
>> >
>> > Jeff
>> >
>> >
>> > On Thu, Mar 7, 2013 at 10:26 AM, Kevin O'dell <[EMAIL PROTECTED]
>> >wrote:
>> >
>> >> The problem is it kills all older cells.  We should probably file a JIRA
>> >> for this, as this behavior would be nice.  Thoughts?:
>> >>
>> >> hbase(main):028:0> truncate 'tre'
>> >>
>> >> Truncating 'tre' table (it may take a while):
>> >>
>> >> - Disabling table...
>> >>
>> >> - Dropping table...
>> >>
>> >> - Creating table...
>> >>
>> >> 0 row(s) in 4.6060 seconds
>> >>
>> >>
>> >> hbase(main):029:0> put 'tre', 'row1', 'cf1:c1', 'abc', 111
>> >>
>> >> 0 row(s) in 0.0220 seconds
>> >>
>> >>
>> >> hbase(main):030:0> put 'tre', 'row1', 'cf1:c1', 'abcd', 112
>> >>
>> >> 0 row(s) in 0.0060 seconds
>> >>
>> >>
>> >> hbase(main):031:0> put 'tre', 'row1', 'cf1:c1', 'abce', 113
>> >>
>> >> 0 row(s) in 0.0120 seconds
>> >>
>> >>
>> >> hbase(main):032:0> scan 'tre', {NAME => 'cf1:c1', VERSIONS => 4}
>> >>
>> >> ROW                                                          COLUMN+CELL
>> >>
>> >>
>> >>
>> >>
>> >> row1
>>  column=cf1:c1,
>> >> timestamp=113, value=abce
>> >>
>> >>
>> >>
>> >> row1
>>  column=cf1:c1,
>> >> timestamp=112, value=abcd
>> >>
>> >>
>> >>
>> >> row1
>>  column=cf1:c1,
>> >> timestamp=111, value=abc
>> >>
>> >>
>> >> hbase(main):033:0> delete 'tre', 'row1', 'cf1:c1', 112
>> >>
>> >> 0 row(s) in 0.0110 seconds
>> >>
>> >>
>> >> hbase(main):034:0> scan 'tre', {NAME => 'cf1:c1', VERSIONS => 4}
>> >>
>> >> ROW                                                          COLUMN+CELL
>> >>
>> >>
>> >>
>> >>
>> >>  row1
>>  column=cf1:c1,
>> >> timestamp=113, value=abce
>> >>
>> >>
>> >>
>> >> 1 row(s) in 0.0290 seconds
>> >>
>> >>
>> >> On Thu, Mar 7, 2013 at 1:22 PM, Sergey Shelukhin <
>> [EMAIL PROTECTED]
>> >> >wrote:
>> >>
>> >> > Shouldn't you be able to insert delete with t belonging to (t2, t3) to
>> >> > achieve this effect?
>> >> >
>> >> > On Thu, Mar 7, 2013 at 10:12 AM, Jonathan Natkins <[EMAIL PROTECTED]
>> >> > >wrote:
>> >> >
>> >> > > Yep, that's the scenario I was curious about. Thanks!
>> >> > >
>> >> > >
>> >> > > On Thu, Mar 7, 2013 at 10:04 AM, Jean-Marc Spaggiari <
>> >> > > [EMAIL PROTECTED]> wrote:
>> >> > >
>> >> > > > Hi Jonathan,
>> >> > > >
>> >> > > > Is that what you mean?
>> >> > > >
>> >> > > > In the same CF:C
>> >> > > > insert r1 v1 t1
>> >> > > > insert r1 v2 t2
>> >> > > > insert r1 v3 t3
>> >> > > >
>> >> > > > Then you want to be able to delete r1 v3 t3 to see r1 v2?
>> >> > > >
>> >> > > > This is not possible. If you put a delete with t4, everything
>> older
>> >> > > > than t4 will be deleted when the compression will occur.
>> >> > > >
>> >> > > > JM
>> >> > > >
>> >> > > > 2013/3/7 Jonathan Natkins <[EMAIL PROTECTED]>:
>> >> > > > > It was suggested to me that there might be a way to delete a
>> cell
>> >> in
>> >> > a
>> >> > > > > column for a particular timestamp, without masking all older
>> >> values.
>> >> > Is
>> >
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB