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I was reading an article about facebook timeline https://www.facebook.com/note.php?note_id=10150468255628920
I always thought this kind of core produces would prefer Cassandra. However it is using MySQL/InnoDB.
Could anyone briefly explain why?
Available internal / external expertise with MySQL (it's easier to google solutions for existing problems)
Cassandra is much harder to reason about due to eventual consistency and limited transaction support
Moving to a new datastore is a lot of pain and it doesn't seem to be justified
You can check out the slides below for their usecases:
MySQL at Facebook
Scale at Facebook
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I am currently making a website on HTML js css...
I want to know what is the best WebHosting service that is cheap
If you are just starting out, I recommend Firebase Hosting (https://firebase.google.com/pricing).
This would suit you because it is free to get started. As long as it is only you and a few friends trying it out, you will find the cost is $0.
Only when thousands of people are using it, or you are storing hundreds of images or videos, will it start to cost something, and that cost is predictable.
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I understand that Chisel is a HDL/HCL language to overcome some of Verilog/SystemVerilog restrictions by using higher abstraction level.
And it is open source as well.
It might be a bit naive and presumptuous, but still I would like to ask.
My question is that why do so many similar efforts are working in parallel, e.g. Blusspec, spinalHDL, Pyha etc?
I mean, is there any reason why the development community may not choose one of these and concentrate efforts on stabilizing or enhancing one of these.
That's exactly what is happening now, it just takes a while to choose.
Although the past does not show that the best technology wins, let us hope it does this time.
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I have recently been thinking about one of my websites. It's getting big and gaining a community and I have realized; how would I implement new features. Would I code instantly on the website or would I have to pull a backup and code on it then put it back up on the server. Because both methods seem to be inefficient.
Would there be a way that I can do such a thing, like a version system (similar to apps)?
Create a duplicate, test your code until you're satisfied. Check the edge cases. Try to break it. Then, when you're sure it's solid, roll it out to your users during very light usage because you might need to turn off the whole site during the upgrade.
Testing, testing, testing is they key.
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I have made a website which does some calculations, so there is no user registration. Just a website where people can do their calculations and leave. However, do I need MySQL as part of the server? I am a bit confused on this.
MySQL (and other database engines like PostgresQL, MongoDB, and even Google's BigTable) are used for storing data outside of user sessions. If you have no need to persist data, then you have no need for a database.
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I want to create a new rails application and I'm not sure whether to use MySQL or Postgres. Which one is best and what is the difference between them?
UPDATE:
The project is a health-care project. It may contain more than 500 tables.
postgres is secure, fast, and full of features but comparatively tricky to use.
MySql has its own benefits along with large user community and vast materials. Immensely helpful if you ever get stuck.
But ultimately it all comes to your preference and framework (apart from rails if your app requires any) support.
Read this for detailed comparison and insights: http://wiki.postgresql.org/wiki/Why_PostgreSQL_Instead_of_MySQL%3a_Comparing_Reliability_and_Speed_in_2007