How To Install libmmap-allocator-dev on Debian 11
Introduction
In this tutorial we learn how to install libmmap-allocator-dev on Debian 11.
What is libmmap-allocator-dev
libmmap-allocator-dev is:
When reading large files (>100MB) into memory, read() calls are usually not very space and time efficient, since the whole data is copiied at least once. Furthermore, when using STL containers (like a vector for example), data is copiied another time unless the location of the vector content as parameter to read() will be specified.
It would be nice to tell the vector a filename and have the vector mmap the file directly. This not only avoids the read() copiing (and the STL vector copiing) but also allows different processes that read the same file to see the same physical memory. Fortunately STL foresees an interface to do exactly this.
Libmmap-allocator helps to handle big files that contain unstructured data (like doubles or even text files), mmap_allocator is worth a try.
There are three methods to install libmmap-allocator-dev on Debian 11. We can use apt-get, apt and aptitude. In the following sections we will describe each method. You can choose one of them.
Install libmmap-allocator-dev Using apt-get
Update apt database with apt-get using the following command.
sudo apt-get update
After updating apt database, We can install libmmap-allocator-dev using apt-get by running the following command:
sudo apt-get -y install libmmap-allocator-dev
Install libmmap-allocator-dev Using apt
Update apt database with apt using the following command.
sudo apt update
After updating apt database, We can install libmmap-allocator-dev using apt by running the following command:
sudo apt -y install libmmap-allocator-dev
Install libmmap-allocator-dev Using aptitude
If you want to follow this method, you might need to install aptitude first since aptitude is usually not installed by default on Debian. Update apt database with aptitude using the following command.
sudo aptitude update
After updating apt database, We can install libmmap-allocator-dev using aptitude by running the following command:
sudo aptitude -y install libmmap-allocator-dev
How To Uninstall libmmap-allocator-dev on Debian 11
To uninstall only the libmmap-allocator-dev package we can use the following command:
sudo apt-get remove libmmap-allocator-dev
Uninstall libmmap-allocator-dev And Its Dependencies
To uninstall libmmap-allocator-dev and its dependencies that are no longer needed by Debian 11, we can use the command below:
sudo apt-get -y autoremove libmmap-allocator-dev
Remove libmmap-allocator-dev Configurations and Data
To remove libmmap-allocator-dev configuration and data from Debian 11 we can use the following command:
sudo apt-get -y purge libmmap-allocator-dev
Remove libmmap-allocator-dev configuration, data, and all of its dependencies
We can use the following command to remove libmmap-allocator-dev configurations, data and all of its dependencies, we can use the following command:
sudo apt-get -y autoremove --purge libmmap-allocator-dev
Dependencies
libmmap-allocator-dev have the following dependencies:
References
Summary
In this tutorial we learn how to install libmmap-allocator-dev package on Debian 11 using different package management tools: apt, apt-get and aptitude.