> I am using the familiar meanings from ACID:
>
> atomic means either the entire update will succeed or none of it.
>
> isolated means other threads will not see partial updates while it is
> being applied.
A related concern is whether there is a write *ordering* guarantee for
mutations within a r
The first.
On Sat, Aug 7, 2010 at 10:04 AM, james anderson wrote:
> good afternoon;
>
> On 2010-08-07, at 15:26 , Jonathan Ellis wrote:
>
>> I am using the familiar meanings from ACID:
>>
>> atomic means either the entire update will succeed or none of it.
>>
>> isolated means other threads will
good afternoon;
On 2010-08-07, at 15:26 , Jonathan Ellis wrote:
I am using the familiar meanings from ACID:
atomic means either the entire update will succeed or none of it.
isolated means other threads will not see partial updates while it is
being applied.
yes, those terms are not new.
i
I am using the familiar meanings from ACID:
atomic means either the entire update will succeed or none of it.
isolated means other threads will not see partial updates while it is
being applied.
On Sat, Aug 7, 2010 at 12:50 AM, james anderson wrote:
> good morning;
>
> On 2010-08-07, at 02:45 ,
good morning;
On 2010-08-07, at 02:45 , Jonathan Ellis wrote:
Everything in the same key of a batch_mutate is atomic. (But not
isolated.)
what does the distinction mean in the context of cassandra?
is it that the execution of an operation with the same key could see
the effect of the 'f
Everything in the same key of a batch_mutate is atomic. (But not isolated.)
On Fri, Aug 6, 2010 at 2:15 PM, B. Todd Burruss wrote:
> ok i just saw the FAQ
> (http://wiki.apache.org/cassandra/FAQ#batch_mutate_atomic)
>
> follow up question ...
>
> it states that "As a special case, mutations agai
ok i just saw the FAQ
(http://wiki.apache.org/cassandra/FAQ#batch_mutate_atomic)
follow up question ...
it states that "As a special case, mutations against a single key are
atomic, but more generally no" ... i interpret that to also mean " ..
mutations against a single key in the same CF ... "
if i am using batch_mutate to update/insert two columns in the same CF
and same key, is this an atomic operation?
i understand that an operation on a single key in a CF is atomic, but
not sure if the above scenario boils down to two operations or
considered one operation.
thx
