[erlang-questions] Looking for advice on simultaneous data modification

[Robert Virding]

How do you mean "All the operations may happen in different processes
simultaneously."? Does it mean that many processes may initiate a record
deletion in parallel or does it mean that there maybe be parallel accesses
to the actual databases?

Robert


On 17 June 2015 at 15:53, Daniil Churikov <ddosia@REDACTED> wrote:

> Hello dear list. I am looking for advice to, perhaps, very common problem.
>
> I have database which does not support transactions, only CAS operations
> for single record.
> I have one-to-many relationship between 2 tables, and I need to implement
> cascade deletion of dependent records from table_2 when main record from
> table_1 was deleted. All the operations may happen in different processes
> simultaneously.
> So my intention is to do some kind of a mutex, which incorporate following
> properties:
> * when main record is in deletion-state, every other action on main and/or
> dependent record should wait until it will be deleted;
> * if main record is in normal-state, all dependencies may be modified
> without any strict order.
>
> Is there any library in the wild which allow me to do this kind of mutex?
> Maybe I have chosen wrong approach? Any suggestions?
>
> Thanks!
>
> _______________________________________________
> erlang-questions mailing list
> erlang-questions@REDACTED
> http://erlang.org/mailman/listinfo/erlang-questions
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://erlang.org/pipermail/erlang-questions/attachments/20150617/36c84ee3/attachment.htm>