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The following page has been changed by Arun C Murthy: http://wiki.apache.org/lucene-hadoop/NativeHadoop ------------------------------------------------------------------------------ ==== Overview ==== - Hadoop has native implementations of certain components for reasons of both performace & non-availability of java-implementations. + Hadoop has native implementations of certain components for reasons of both performace & non-availability of java-implementations in a ''single'' dynamically linked native-hadoop library. On the *nix platform it is '''libhadoop.so'''. This section describes the usage & details on how to build the native-libraries. ==== Native Hadoop Libraries ==== @@ -55, +55 @@ * [http://www.gnu.org/software/autoconf/ autoconf] * [http://www.gnu.org/software/automake/ automake] * [http://www.gnu.org/software/libtool/ libtool] - * [http://www.zlib.net/ zlib-development package] + * [http://www.zlib.net/ zlib-development package] (stable version >= 1.2.0) - * [http://www.oberhumer.com/opensource/lzo/ lzo-development package] + * [http://www.oberhumer.com/opensource/lzo/ lzo-development package] (stable version >= 2.0) + '''Notes''': - '''Note''': It is '''mandatory''' to have both the zlib and lzo development packages on the target platform for ''building'' the native-hadoop library; however for deployment it is sufficient to have install zlib ''or'' lzo if you wish to use only one of them. + * It is '''mandatory''' to have both the zlib and lzo development packages on the target platform for ''building'' the native-hadoop library; however for deployment it is sufficient to have install zlib ''or'' lzo if you wish to use only one of them. + * It is necessary to have the correct 32/64 libraries of both zlib/lzo depending on the 32/64 bit jvm for the target platform for building/deployment of the native-hadoop library.
