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what's the difference between “hadoop fs” shell commands and “hdfs dfs” shell commands?
...ates to any filesystem like, local or hdfs, How hadoop choose to show HDFS root directory content when I do hadoop fs -ls / ? Also, How can I tell hadoop to show my local root directory content when I run the hadoop fs -ls / command ?
– sgsi
Jan 29 '15 at 22:5...
Using an ORM or plain SQL? [closed]
...hen proceeded to forget about), I've been writing plain SQL, primarily for MySQL. Though I have used ORMs in python like SQLAlchemy , I didn't stick with them for long. Usually it was either the documentation or complexity (from my point of view) holding me back.
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How do I create an HTML table with a fixed/frozen left column and a scrollable body?
... also used jQuery to .clone() the table, once it has been generated by php+MySQL+ajax, and insert it into a cleaned out div...
– Peter
Mar 6 '18 at 22:27
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How to port data-only volumes from one host to another?
...abilities of union filesystem to create a unified view of data (mainly the root file system) across the source and target hosts. This allows Cargo to start up a container almost immediately (within milliseconds) on the target host as the data from source root file system gets copied to target hosts ...
How do you use Mongoose without defining a schema?
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@a20: I understand what you say about MySQL :) And I think Jonathan suggestion/as per Mongoose API Docs Note: Do not set to false unless you have good reason. Is absolutely fine with the current context (about only NO-SQL)
– Amol M Kulkarni
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Differences between “java -cp” and “java -jar”?
...IFEST using space separated jars in a Class-Path entry, e.g.:
Class-Path: mysql.jar infobus.jar acme/beans.jar
Both are comparable in terms of performance.
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What is the purpose of Android's tag in XML layouts?
... element in layout2. If layout2 had multiple elements, then it MUST have a root node to be valid XML and that's when the merge tag comes in handy.
– gMale
Feb 22 '14 at 16:37
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postgresql return 0 if returned value is null
... are NULL values in the query.
For all versions I've tested, postgres and mysql will ignore all NULL values when averaging, and it will return NULL if there is nothing to average over. This generally makes sense, as NULL is to be considered "unknown". If you want to override this you can use coale...
How many bytes does one Unicode character take?
...ints.net/.
I wasted a lot of time on this useless list (but it's sorted!).
MySQL has a charset called "utf8" which actually does not support characters longer than 3 bytes. So you can't insert a pile of poo, the field will be silently truncated. Use "utf8mb4" instead.
There's a snowman test page (un...
Spring Boot application as a Service
...ou might want to add ordering statements to the [Unit] section, e.g. After=mysql.service, Before=apache2.service.
– rustyx
Jan 25 at 9:41
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