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Create an index on a huge MySQL production table without table locking
...pare the script, and I usually having to create a .sql file containing the raw SQL change and a .sh file as wrapper to run the same SQL but in fragment format (no ALTER TABLE). You can run multiple commands with pt-online-schema-change by stringing them up and separated by comma.
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Best approach to real time http streaming to HTML5 video client
...ith that). MP4 is broken into two pieces: moov and mdat. mdat contains the raw audio video data. But it is not indexed, so without the moov, it is useless. The moov contains an index of all data in the mdat. But due to its format, it can not be 'flattened' until the timestamps and size of EVERY fram...
Why can't I inherit static classes?
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@KonradMorawski It's impossible to write extension methods for static classes. stackoverflow.com/questions/249222/…
– Martin Braun
Jul 16 '14 at 10:19
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Chaining multiple MapReduce jobs in Hadoop
...uture version will support Riffle annotations, but it works great now with raw MR JobConf jobs.
A variant on this is to not manage MR jobs by hand at all, but develop your application using the Cascading API. Then the JobConf and job chaining is handled internally via the Cascading planner and Flow...
What's the difference between SortedList and SortedDictionary?
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To roughly paraphrase, if you require raw performance SortedDictionary could be a better choice. If you require lesser memory overhead and indexed retrieval SortedList fits better. See this question for more on when to use which.
You can read more here, here, he...
Check to see if a string is serialized?
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IMPORTANT: Never ever unserialize raw user data since it can be used as an attack vector. OWASP:PHP_Object_Injection
– ArtBIT
Sep 1 '17 at 18:56
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How to use the “number_to_currency” helper method in the model rather than view?
...ust this one thing” to a bloated model. App helpers in Rails are a junk-drawer, presenters/view-models are easier to manage. I don’t see creating the data for a report and generating the (html|pdf|csv|etc.) view of that data as a single responsibility any more than I do for, e.g., a person and a...
What is the difference between Cloud, Grid and Cluster? [closed]
...t, except that nowadays the concept is applied more widely. (I.e. not just raw computing, also entire services, or storage ...)
Grid: a grid is simply many computers which together might solve a given problem/crunch data. The fundamental difference between a grid and a cluster is that in a grid eac...
Which C++ idioms are deprecated in C++11?
...lly deduced would help a lot making the syntax more easily comparable to a raw loop.
Basically, reading algorithms made with standard algorithms are far easier as words hiding the implementation details of the loops.
I'm guessing only higher level algorithms have to be thought about now that we ha...
How do you reverse a string in place in C or C++?
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Tested on my iphone this is slower than using raw pointer addresses by about 15%
– jjxtra
Apr 29 '13 at 20:16
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