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Shards and replicas in Elasticsearch
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An index is broken into shards in order to distribute them and scale.
Replicas are copies of the shards and provide reliability if a node is lost. There is often confusion in this number because replica count == 1 means the cluster must have the main and a ...
What is a vertical tab?
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Microsoft Word uses VT as a line separator in order to distinguish it from the normal new line function, which is used as a paragraph separator.
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How can I delete Docker's images?
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In order to delete all images, use the given command
docker rmi $(docker images -q)
In order to delete all containers, use the given command
docker rm $(docker ps -a -q)
Warning: This will destroy all your images and conta...
Python class inherits object
...lets you customize how new class instances are created.
Method resolution order (MRO): in what order the base classes of a class will be searched when trying to resolve which method to call.
Related to MRO, super calls. Also see, super() considered super.
If you don't inherit from object, forget...
How to use OrderBy with findAll in Spring Data
...StudentEntity, Integer> {
public List<StudentEntity> findAllByOrderByIdAsc();
}
The code above should work. I'm using something similar:
public List<Pilot> findTop10ByOrderByLevelDesc();
It returns 10 rows with the highest level.
IMPORTANT:
Since I've been told that it's eas...
How do I tell Maven to use the latest version of a dependency?
...he
child modules. (Note you may need to
invoke Maven with the -N option in
order to run this goal if your
project is broken so badly that it
cannot build because of the version
mis-match).
versions:lock-snapshots searches the pom for all -SNAPSHOT
versions and replaces them with the
current timestam...
What is the optimal Jewish toenail cutting algorithm?
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The obvious: Find one order that works, and hard code it. But I don't think you want to do that.
You can generate permutations much better than the way you are doing it. You don't need to do rejection sampling. Use a Fisher Yates shuffle on an...
How do you maintain development code and production code? [closed]
...here you merge only feature branch to dev, then if selected, to master, in order to be able to drop easily feature branches not ready for the next release) is implemented in the Git repo itself, with the gitworkflow (one word, illustrated here).
See more at rocketraman/gitworkflow. The history of do...
Error when installing windows SDK 7.1
...ll the newer version
of the Visual C++ 2010 Redistributable products, in order to restore
the Visual C++ 2010 Redistributable products to their original state.
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How does password salt help against a rainbow table attack?
...the salt.
You always have to store the salt with the password, because in order to validate what the user entered against your password database, you have to combine the input with the salt, hash it and compare it to the stored hash.
Security of the hash
Now somebody with a rainbow table could rev...