Wow. I totally understood what you wrote.
Question: What is the TransactionLog in a distributed environment?
e.g. Akka-driven traversers spawned from the same query
migrating around the cluster mutating stuff.
Thanks for the lesson,
Marko.
http://rredux.com <http://rredux.com/>
> On May 15, 2019, at 8:58 AM, Joshua Shinavier <j...@fortytwo.net> wrote:
>
> Hi Stephen,
>
> More the latter. TinkerPop transactions would be layered on top of the
> native transactions of the database (if any), which gives the VM more
> control over the operational semantics of a computation in between database
> commits. For example, in many scenarios it would be desirable not to mutate
> the graph at all until a traversal has completed, so that the result does
> not depend on the order of evaluation. Consider a traversal which adds or
> deletes elements as it goes. In some cases, you want writes and reads to
> build on each other, so that what you wrote in one step is accessible for
> reading in the next step. This is a very imperative style of traversal for
> which you need to understand how the VM builds a query plan in order to
> predict the result. In many other cases, you might prefer a more functional
> approach, for which you can forget about the query plan. Without VM-level
> transactions, you don't have this choice; you are at the mercy of the
> underlying database. The extra level of control will be useful for
> concurrency and parallelism, as well -- without it, the same programs may
> have different results when executed on different databases.
>
> Josh
>
>
>
>
> On Wed, May 15, 2019 at 6:47 AM Stephen Mallette <spmalle...@gmail.com>
> wrote:
>
>> Hi Josh, interesting... we have graphs with everything from no transactions
>> like TinkerGraph to more acid transactional systems and everything in
>> between - will transaction support as you describe it cover all the
>> different transactional semantics of the underlying graphs which we might
>> encounter? or is this an approach that helps unify those different
>> transactional semantics under TinkerPop's definition of a transaction?
>>
>> On Wed, May 15, 2019 at 9:23 AM Joshua Shinavier <j...@fortytwo.net>
>> wrote:
>> [...]
