It's di开发者_Python百科fficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical andcannot be reasonably answered in its current for
Is there anyway to synchronise client using cassandra built in functions? I need to perform some operations and those operations need to be synchronized with all other clients (mutual exclusion).
With this kind of design, I would like to create a functionality with which to add and delete records from the junction table.
If I have a list of regular expressions, is there an easy way to determine that no two of them will both return a match for the same string?
Read some texts about locking in PHP. They all, mainly, direct to http://php.net/manual/en/function.flock.php .
Say I have a web service 开发者_StackOverflow中文版where I want to serve the content only once. After it is served any other access to that url should generate an error message.
So I have a list of CSVs in one table. (EG:1,3,19 ) I want to search out all of the usernames from the other table where the ids m开发者_如何转开发atch any of those.
For concurrency 开发者_StackOverflow社区and ensuring the integrity of the data, how would you obtain a mutual-exclusion lock for a given object?Would you need to use locking within the database, or a
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I\'m working up an analysis model in UML, and I\'m a bit stuck when trying to represent a constraint on a couple of attributes in a class diagram. In the following class:
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