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Database sharding vs partitioning
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Partitioning is more a generic term for dividing data across tables or databases. Sharding is one specific type of partitioning, part of what is called horizontal partitioning.
Here you replicate the schema across (typically) multiple insta...
What is the difference between Tomcat, JBoss and Glassfish?
... EE 6 Web Profile certified via TomEE and supports EJB, CDI, JSF, JPA, and more.
– David Blevins
Jul 24 '12 at 17:35
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Combine two columns of text in pandas dataframe
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SQL WHERE.. IN clause multiple columns
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or more generally SELECT * FROM table INNER JOIN otherTable ON ( table.x = otherTable.a AND table.y = otherTable.b)
– ala
Jul 16 '09 at 7:56
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C++ - passing references to std::shared_ptr or boost::shared_ptr
...f I have a function that needs to work with a shared_ptr , wouldn't it be more efficient to pass it a reference to it (so to avoid copying the shared_ptr object)?
What are the possible bad side effects?
I envision two possible cases:
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Anonymous recursive PHP functions
...ed "fix" from functional languages. The fix function from Haskell is known more generally as the Y combinator, which is one of the most well-known fixed point combinators.
A fixed point is a value that is unchanged by a function: a fixed point of a function f is any x such that x = f(x). A fixed...
Where do you store your salt strings?
...hey dont have access to the salt, that is akin to the user having a longer more secure password. now, how likely is it that the salt database will stay safe while the password database is stolen is up for debate, but thats a separate issue.
– chacham15
Apr 26 '...
Why can't static methods be abstract in Java?
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A more concise answer would be 'bad language design.' Static should mean 'belongs to the class' because that's how it's used intuitively as this very question demonstrates. See "classmethod" in Python.
– A...
How can I create download link in HTML?
...lking about. (It is now safe to use the approach described TIIUNDER's much more recent answer below, though. It should get the accept mark.)
– Pekka
Dec 25 '14 at 23:51
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How do you add swap to an EC2 instance?
...r extra memory, this memory is much slower than normal memory however much more of it is available.
To add this extra space to your instance you type:
sudo /bin/dd if=/dev/zero of=/var/swap.1 bs=1M count=1024
sudo /sbin/mkswap /var/swap.1
sudo chmod 600 /var/swap.1
sudo /sbin/swapon /var/swap.1
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