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Storing Images in PostgreSQL
...m with backing up blobs!), PostgreSQL additional supplied modules, How-tos etc.
use a separate database with DBlink: for original image store, at another (unified/specialized) database. In this case, I prefer bytea, but blob is near the same. Separating database is the best way for a "unified imag...
What is an OS kernel ? How does it differ from an operating system? [closed]
...le users to get something done (i.e compiler, text editor, window manager, etc).
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What is the difference between integration testing and functional testing? [closed]
...whether it is functionally working properly or not (testing buttons, links etc.)
For example: Login page.
you provide the username and password, you test whether it is taking you to home page or not.
Integration Testing:
Yes, you test the integrated software only but you test where the data flow...
What's the difference between git clone --mirror and git clone --bare
... cloned repo has it all. It's also set up so that a remote update will re-fetch everything from the origin (overwriting the copied refs). The idea is really to mirror the repository, to have a total copy, so that you could for example host your central repo in multiple places, or back it up. Think o...
How to parse JSON in Java
... How can I parse it to get the values of pageName , pagePic , post_id , etc.?
34 Answers
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Asynchronous vs Multithreading - Is there a difference?
... to other work while the I/O hardware (disk controller, network interface, etc.) does the I/O work. The hardware lets the CPU know when it's finished by interrupting the CPU, and the OS then delivers the event to your application.
Frequently higher-level abstractions and APIs don't expose the unde...
Implementing Comments and Likes in database
...ity tables Photo, Article, Place have their own PK e.g. PhotoID, ArticleID etc but also have another column for the Entity_ID as a FK? Is this unnecessary?
– volume one
Sep 17 '14 at 21:03
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Using Emacs to recursively find and replace in text files not already open
...eplace-regexp: SPACE to replace and move to next match, n to skip a match, etc.
Press C-x s to save buffers. (You can then press y, n or ! to save all at once)
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How do I run a node.js app as a background service?
...ly every Linux distro comes with systemd, which means forever, monit, PM2, etc are no longer necessary - your OS already handles these tasks.
Make a myapp.service file (replacing 'myapp' with your app's name, obviously):
[Unit]
Description=My app
[Service]
ExecStart=/var/www/myapp/app.js
Restart...
Is Redis just a cache?
...ps you with all the plumbing on the server side.
Persistence, Reliability etc.
Unlike a Cache, Redis persists data on the hard disk. You can have a master-slave setup to provide better reliability. To learn more, go through Persistence and Replication topics over here - http://redis.io/documentati...