85 lines
2.9 KiB
Plaintext
85 lines
2.9 KiB
Plaintext
= Libaio Native Libraries
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:idprefix:
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:idseparator: -
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Apache ActiveMQ Artemis distributes a native library, used as a bridge for its fast journal, between Apache ActiveMQ Artemis and Linux libaio.
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`libaio` is a library, developed as part of the Linux kernel project.
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With `libaio` we submit writes to the operating system where they are processed asynchronously.
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Some time later the OS will call our code back when they have been processed.
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We use this in our high performance journal if configured to do so, please see xref:persistence.adoc#persistence[Persistence].
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These are the native libraries distributed by Apache ActiveMQ Artemis:
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* libartemis-native-64.so - x86 64 bits
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* We distributed a 32-bit version until early 2017.
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While it's not available on the distribution any longer it should still be possible to compile to a 32-bit environment if needed.
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When using libaio, Apache ActiveMQ Artemis will always try loading these files as long as they are on the xref:using-server.adoc#library-path[library path]
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== Runtime dependencies
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If you just want to use the provided native binaries you need to install the required libaio dependency.
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You can install libaio using the following steps as the root user:
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Using yum, (e.g. on Fedora or Red Hat Enterprise Linux):
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----
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yum install libaio
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----
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Using aptitude, (e.g. on Ubuntu or Debian system):
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----
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apt-get install libaio1
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----
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== Compiling the native libraries
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In the case that you are using Linux on a platform other than x86_32 or x86_64 (for example Itanium 64 bits or IBM Power) you may need to compile the native library, since we do not distribute binaries for those platforms with the release.
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== Compilation dependencies
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[NOTE]
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====
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The native layer is only available on Linux.
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If you are in a platform other than Linux the native compilation will not work
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====
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These are the required linux packages to be installed for the compilation to work:
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* gcc - C Compiler
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* gcc-c{pp} or g{pp} - Extension to gcc with support for C{pp}
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* libtool - Tool for link editing native libraries
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* libaio - library to disk asynchronous IO kernel functions
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* libaio-dev - Compilation support for libaio
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* cmake
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* A full JDK installed with the environment variable JAVA_HOME set to its location
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To perform this installation on RHEL or Fedora, you can simply type this at a command line:
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sudo yum install libtool gcc-c++ gcc libaio libaio-devel cmake
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Or on Debian systems:
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sudo apt-get install libtool gcc-g++ gcc libaio libaio- cmake
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[NOTE]
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====
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You could find a slight variation of the package names depending on the version and Linux distribution.
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(for example gcc-c{pp} on Fedora versus g{pp} on Debian systems)
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====
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== Invoking the compilation
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In the source distribution or git clone, in the `artemis-native` directory, execute the shell script `compile-native.sh`.
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This script will invoke the proper commands to perform the native build.
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If you want more information refer to the https://cmake.org[cmake web pages].
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