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mongodb, replicates and error: { “$err” : “not master and slaveOk=false”, “code” : 13435 }
...l know that you're allowing reads from a secondary. This is to protect you and your applications from performing eventually consistent reads by accident. You can do this in the shell with:
rs.slaveOk()
After that you can query normally from secondaries.
A note about "eventual consistency": unde...
_DEBUG vs NDEBUG
...defines _DEBUG when you specify the /MTd or /MDd option, NDEBUG disables standard-C assertions. Use them when appropriate, ie _DEBUG if you want your debugging code to be consistent with the MS CRT debugging techniques and NDEBUG if you want to be consistent with assert().
If you define your own de...
recursion versus iteration
...rrect to say that everywhere recursion is used a for loop could be used? And if recursion is usually slower what is the technical reason for ever using it over for loop iteration?
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Using an RDBMS as event sourcing storage
...ashioned state-based persistence). Therefore I wouldn't recommend option 1 and 2 at all.
Below is the schema as used in Ncqrs. As you can see, the table "Events" stores the related data as a CLOB (i.e. JSON or XML). This corresponds to your option 3 (Only that there is no "ProductEvents" table beca...
What is the volatile keyword useful for?
...trol whether some code continues a loop. The loop tests the volatile value and continues if it is true. The condition can be set to false by calling a "stop" method. The loop sees false and terminates when it tests the value after the stop method completes execution.
The book "Java Concurrency in P...
Using SQL Server 2008 and SQL Server 2005 and date time
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Open your EDMX in a file editor (or “open with…” in Visual Studio and select XML Editor). At the top you will find the storage model and it has an attribute ProviderManifestToken. This has should have the value 2008. Change that to 2005, recompile and everything works.
NOTE: You'll have to...
Static method behavior in multi-threaded environment in java
There's a simple stupid question that bother me and make several arguments in my mind.
I want to throw out all the doubts about below questions.
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What do the terms “CPU bound” and “I/O bound” mean?
What do the terms "CPU bound" and "I/O bound" mean?
11 Answers
11
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Difference between Observer, Pub/Sub, and Data Binding
...hat is the difference between the Observer Pattern , Publish/Subscribe , and Data Binding ?
4 Answers
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What does in XML mean?
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CDATA stands for Character Data and it means that the data in between these strings includes data that could be interpreted as XML markup, but should not be.
The key differences between CDATA and comments are:
As Richard points ou...