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What is the best alternative to Mirage OS?
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Rumprun
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Experiences
Pros
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Cons
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Pro
Can run on bare hardware as well as hypervisors
Rumprun is multiplatform and can run on different types of platforms, including hypervisors (such as Xen and KVM) as well as running on bare hardware.
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Con
Has some complexity added because it's not based on a language with process isolation
Since C and C++ (with which Rumprun is built) have no language level isolation, Rumprun doesn't have process isolation either. Because of this, sensitive components have to be split into different nodes, isolated by either different virtual machines or different computers.
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Pro
Can be integrated to existing systems
Rump provides kernel-quality drivers for a variety of use-cases from filesystem to PCI device drivers. Because of this, they can be integrated into existing systems or can be run as standalone unikernels on hypervisors.
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OSv
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4
Experiences
Pros
3
Cons
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Pro
Quick booting
OSv is able to boot in less than a second.
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Con
Can only run one application at a time
Since it tries to have maximum performance, OSv can only afford to run one application per hypervisor at a time.
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Pro
Amazing performance
Since OSv is created to run one single application on top of a hypervisor, it offers great performance and speed.
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Pro
Supports multiple platforms
OSv can run applications written in multiple programming languages and that run on multiple different platforms. Such as Java, C, Ruby, Node and Scala. With support for other languages on the way.
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2
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unittest
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10
Experiences
Pros
6
Cons
4
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Pro
Part of the Python standard library
PyUnit has been a part of the Python standard library since version 2.1 as the unittest module. This makes it widely available to developers without the need to install additional modules since it's coming out of the box with Python.
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Con
camelCase naming
Idiomatic python code uses snake_case, but this was ported so closely from JUnit that it has retained java-style camelCase method names. That can be jarring.
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Pro
Flexible test case execution
The way tests are run is through: if name == 'main': unittest.main() Then unittest.main() builds a TestSuite object that contains all the tests that have method names starting with "test", then a TextTestRunnerwhich then executes each method and prints the results. But individual test cases can be executed simply by specifying their names on the terminal: python unittest_program.py testProgram.testGetFeedPostingHost The default output is usually pretty concise, but it can be more verbose simply by adding a -v flag in the end when calling the test from the command line. So unittest can be considered pretty flexible when it comes to test case execution.
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Con
No color output
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Pro
Promotes grouping related tests into common test suites
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Con
The API can make the test code's intent hard to understand
Although unittest does not have a huge API that needs to be remembered, it has too much support for abstraction, this makes the test code intent's unclear.
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Pro
Very fast test collection
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Con
Verbose
Too much boilerplate code is needed.
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Pro
Easy to use for people who are comfortable with testing in other languages
Since pyUnit is a derivative of xUnit and it's quite similar to other xUnit frameworks, it's quite easy for people with not much Python background to relate to.
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Pro
Very precise test duration reports
Unittest reports tests duration in milliseconds
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