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Posted to user@cassandra.apache.org by Roshan Dawrani <ro...@gmail.com> on 2010/12/26 16:14:55 UTC

The mutations to delete sub-columns can't be batched?

Hi,

Is it correct that mutations that delete subcolumns of a super column can't
be batched - unlike inserts and deletes of normal columns?

If yes, could someone share why that is so?

Thanks.

-- 
Roshan
Blog: http://roshandawrani.wordpress.com/
Twitter: @roshandawrani <http://twitter.com/roshandawrani>
Skype: roshandawrani

Re: The mutations to delete sub-columns can't be batched?

Posted by Ran Tavory <ra...@gmail.com>.

an oversight as well. as you can imagine, non of us is a fan of super
columns...

On Tue, Dec 28, 2010 at 6:28 AM, Roshan Dawrani <ro...@gmail.com>wrote:

> Hi,
>
> I think I may have found another oversight on the Hector API.
>
> OrderedRows has a convenient peekLast() method, but it is missing in
> OrderedSuperRows.
>
> I am trying to get the rows in a batched manner, and being able to peek at
> the last one to make it the start key of the next batch is convenient.
>
> Of-course, I am able to pick the last row in a not-so-convenient way, but
> the API should be symmetrical.
>
>
>
> On Mon, Dec 27, 2010 at 10:22 PM, Nate McCall <na...@riptano.com> wrote:
>
>> Huh. That appears to be an oversight on our part. I'll add an
>> addSubDeletion to the Mutator class in trunk. Thank you for bringing
>> this up.
>>
>> On Sun, Dec 26, 2010 at 10:47 PM, Roshan Dawrani
>> <ro...@gmail.com> wrote:
>> > There doesn't really seem to be an inherent limitation in batching
>> > sub-column deletes.
>> >
>> > Pelops seem to be doing it -
>> >
>> http://pelops.googlecode.com/svn/trunk/src/org/wyki/cassandra/pelops/Mutator.java
>> > [deleteSubColumn() / deleteSubColumns()]
>> >
>> > Is it worth an improvement request on Hector?
>> >
>> > On Mon, Dec 27, 2010 at 10:07 AM, Roshan Dawrani <
>> roshandawrani@gmail.com>
>> > wrote:
>> >>
>> >> Which "No"?
>> >>
>> >> 1) No, it is "not" correct correct that they can't be batched, or
>> >>
>> >> 1) No, they can't be batched
>> >>
>> >> :-)
>> >>
>> >>
>> >> On Mon, Dec 27, 2010 at 10:04 AM, Jonathan Ellis <jb...@gmail.com>
>> >> wrote:
>> >>>
>> >>> On Sun, Dec 26, 2010 at 9:14 AM, Roshan Dawrani <
>> roshandawrani@gmail.com>
>> >>> wrote:
>> >>> > Is it correct that mutations that delete subcolumns of a super
>> column
>> >>> > can't
>> >>> > be batched - unlike inserts and deletes of normal columns?
>> >>>
>> >>> No.
>> >>>
>> >>> --
>> >>> Jonathan Ellis
>> >>> Project Chair, Apache Cassandra
>> >>> co-founder of Riptano, the source for professional Cassandra support
>> >>> http://riptano.com
>> >>
>> >>
>> >>
>> >> --
>> >> Roshan
>> >> Blog: http://roshandawrani.wordpress.com/
>> >> Twitter: @roshandawrani
>> >> Skype: roshandawrani
>> >>
>> >
>>
>
>
>
> --
> Roshan
> Blog: http://roshandawrani.wordpress.com/
> Twitter: @roshandawrani <http://twitter.com/roshandawrani>
> Skype: roshandawrani
>
>


-- 
/Ran

Re: The mutations to delete sub-columns can't be batched?

Posted by Roshan Dawrani <ro...@gmail.com>.

Hi,

I think I may have found another oversight on the Hector API.

OrderedRows has a convenient peekLast() method, but it is missing in
OrderedSuperRows.

I am trying to get the rows in a batched manner, and being able to peek at
the last one to make it the start key of the next batch is convenient.

Of-course, I am able to pick the last row in a not-so-convenient way, but
the API should be symmetrical.


On Mon, Dec 27, 2010 at 10:22 PM, Nate McCall <na...@riptano.com> wrote:

> Huh. That appears to be an oversight on our part. I'll add an
> addSubDeletion to the Mutator class in trunk. Thank you for bringing
> this up.
>
> On Sun, Dec 26, 2010 at 10:47 PM, Roshan Dawrani
> <ro...@gmail.com> wrote:
> > There doesn't really seem to be an inherent limitation in batching
> > sub-column deletes.
> >
> > Pelops seem to be doing it -
> >
> http://pelops.googlecode.com/svn/trunk/src/org/wyki/cassandra/pelops/Mutator.java
> > [deleteSubColumn() / deleteSubColumns()]
> >
> > Is it worth an improvement request on Hector?
> >
> > On Mon, Dec 27, 2010 at 10:07 AM, Roshan Dawrani <
> roshandawrani@gmail.com>
> > wrote:
> >>
> >> Which "No"?
> >>
> >> 1) No, it is "not" correct correct that they can't be batched, or
> >>
> >> 1) No, they can't be batched
> >>
> >> :-)
> >>
> >>
> >> On Mon, Dec 27, 2010 at 10:04 AM, Jonathan Ellis <jb...@gmail.com>
> >> wrote:
> >>>
> >>> On Sun, Dec 26, 2010 at 9:14 AM, Roshan Dawrani <
> roshandawrani@gmail.com>
> >>> wrote:
> >>> > Is it correct that mutations that delete subcolumns of a super column
> >>> > can't
> >>> > be batched - unlike inserts and deletes of normal columns?
> >>>
> >>> No.
> >>>
> >>> --
> >>> Jonathan Ellis
> >>> Project Chair, Apache Cassandra
> >>> co-founder of Riptano, the source for professional Cassandra support
> >>> http://riptano.com
> >>
> >>
> >>
> >> --
> >> Roshan
> >> Blog: http://roshandawrani.wordpress.com/
> >> Twitter: @roshandawrani
> >> Skype: roshandawrani
> >>
> >
>



-- 
Roshan
Blog: http://roshandawrani.wordpress.com/
Twitter: @roshandawrani <http://twitter.com/roshandawrani>
Skype: roshandawrani

Re: The mutations to delete sub-columns can't be batched?

Posted by Nate McCall <na...@riptano.com>.

Huh. That appears to be an oversight on our part. I'll add an
addSubDeletion to the Mutator class in trunk. Thank you for bringing
this up.

On Sun, Dec 26, 2010 at 10:47 PM, Roshan Dawrani
<ro...@gmail.com> wrote:
> There doesn't really seem to be an inherent limitation in batching
> sub-column deletes.
>
> Pelops seem to be doing it -
> http://pelops.googlecode.com/svn/trunk/src/org/wyki/cassandra/pelops/Mutator.java
> [deleteSubColumn() / deleteSubColumns()]
>
> Is it worth an improvement request on Hector?
>
> On Mon, Dec 27, 2010 at 10:07 AM, Roshan Dawrani <ro...@gmail.com>
> wrote:
>>
>> Which "No"?
>>
>> 1) No, it is "not" correct correct that they can't be batched, or
>>
>> 1) No, they can't be batched
>>
>> :-)
>>
>>
>> On Mon, Dec 27, 2010 at 10:04 AM, Jonathan Ellis <jb...@gmail.com>
>> wrote:
>>>
>>> On Sun, Dec 26, 2010 at 9:14 AM, Roshan Dawrani <ro...@gmail.com>
>>> wrote:
>>> > Is it correct that mutations that delete subcolumns of a super column
>>> > can't
>>> > be batched - unlike inserts and deletes of normal columns?
>>>
>>> No.
>>>
>>> --
>>> Jonathan Ellis
>>> Project Chair, Apache Cassandra
>>> co-founder of Riptano, the source for professional Cassandra support
>>> http://riptano.com
>>
>>
>>
>> --
>> Roshan
>> Blog: http://roshandawrani.wordpress.com/
>> Twitter: @roshandawrani
>> Skype: roshandawrani
>>
>

Re: The mutations to delete sub-columns can't be batched?

Posted by Roshan Dawrani <ro...@gmail.com>.

There doesn't really seem to be an inherent limitation in batching
sub-column deletes.

Pelops seem to be doing it -
http://pelops.googlecode.com/svn/trunk/src/org/wyki/cassandra/pelops/Mutator.java[deleteSubColumn()
/ deleteSubColumns()]

Is it worth an improvement request on Hector?

On Mon, Dec 27, 2010 at 10:07 AM, Roshan Dawrani <ro...@gmail.com>wrote:

> Which "No"?
>
> 1) No, it is "not" correct correct that they can't be batched, or
>
> 1) No, they can't be batched
>
> :-)
>
>
>
> On Mon, Dec 27, 2010 at 10:04 AM, Jonathan Ellis <jb...@gmail.com>wrote:
>
>> On Sun, Dec 26, 2010 at 9:14 AM, Roshan Dawrani <ro...@gmail.com>
>> wrote:
>> > Is it correct that mutations that delete subcolumns of a super column
>> can't
>> > be batched - unlike inserts and deletes of normal columns?
>>
>> No.
>>
>> --
>> Jonathan Ellis
>> Project Chair, Apache Cassandra
>> co-founder of Riptano, the source for professional Cassandra support
>> http://riptano.com
>>
>
>
>
> --
> Roshan
> Blog: http://roshandawrani.wordpress.com/
> Twitter: @roshandawrani <http://twitter.com/roshandawrani>
> Skype: roshandawrani
>
>

Re: The mutations to delete sub-columns can't be batched?

Posted by Roshan Dawrani <ro...@gmail.com>.

Which "No"?

1) No, it is "not" correct correct that they can't be batched, or

1) No, they can't be batched

:-)


On Mon, Dec 27, 2010 at 10:04 AM, Jonathan Ellis <jb...@gmail.com> wrote:

> On Sun, Dec 26, 2010 at 9:14 AM, Roshan Dawrani <ro...@gmail.com>
> wrote:
> > Is it correct that mutations that delete subcolumns of a super column
> can't
> > be batched - unlike inserts and deletes of normal columns?
>
> No.
>
> --
> Jonathan Ellis
> Project Chair, Apache Cassandra
> co-founder of Riptano, the source for professional Cassandra support
> http://riptano.com
>



-- 
Roshan
Blog: http://roshandawrani.wordpress.com/
Twitter: @roshandawrani <http://twitter.com/roshandawrani>
Skype: roshandawrani

Re: The mutations to delete sub-columns can't be batched?

Posted by Jonathan Ellis <jb...@gmail.com>.

On Sun, Dec 26, 2010 at 9:14 AM, Roshan Dawrani <ro...@gmail.com> wrote:
> Is it correct that mutations that delete subcolumns of a super column can't
> be batched - unlike inserts and deletes of normal columns?

No.

-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support
http://riptano.com