Technologies in AppScale

http://incubator.apache.org/thrift/

Thrift is a software framework for scalable cross-language services development. It combines a software stack with a code generation engine to build services that work efficiently and seamlessly between C++, Java, Python, PHP, Ruby, Erlang, Perl, Haskell, C#, Cocoa, Smalltalk, and OCaml.

Originally developed at Facebook, Thrift was open sourced in April 2007 and entered the Apache Incubator in May, 2008.

http://www.xen.org/

The Xen® hypervisor, the powerful open source industry standard for virtualization, offers a powerful, efficient, and secure feature set for virtualization of x86, x86_64, IA64, PowerPC, and other CPU architectures. It supports a wide range of guest operating systems including Windows®, Linux®, Solaris®, and various versions of the BSD operating systems. (more) Xen.org releases Xen 3.3 - "The Xen.org community has made security and performance key criteria for the evolution of Xen," said Zeus Kerravala, SVP, Enterprise Research, Yankee Group. "This has been a successful strategy, according to recent Yankee Group survey data showing Xen's rapid growth." "I think Xen is a great product. It is easy to use. But most importantly is the very active community around it...", Werner Vogels,CTO Amazon.com from his video interview on Virtualization.com SWIG SWIG is a software development tool that connects programs written in C and C++ with a variety of high-level programming languages. SWIG is used with different types of languages including common scripting languages such as Perl, PHP, Python, Tcl and Ruby. The list ofsupported languages also includes non-scripting languages such as C#, Common Lisp (CLISP, Allegro CL, CFFI, UFFI), Java, Lua, Modula-3, OCAML, Octave and R. Also several interpreted and compiled Scheme implementations (Guile, MzScheme, Chicken) are supported. SWIG is most commonly used to create high-level interpreted or compiled programming environments, user interfaces, and as a tool for testing and prototyping C/C++ software. SWIG can also export its parse tree in the form of XML and Lisp s-expressions. SWIG may be freely used, distributed, and modified for commercial and non-commercial use. Hbase HBase: Bigtable-like structured storage for Hadoop HDFS Just as Google's  Bigtable leverages the distributed data storage provided by the  Google File System, HBase provides Bigtable-like capabilities on top of Hadoop Core. Data is organized into tables, rows and columns. An Iterator-like interface is available for scanning through a row range (and of course there is the ability to retrieve a column value for a specific key). Any particular column may have multiple versions for the same row key. What Is Hadoop? The Apache Hadoop project develops open-source software for reliable, scalable, distributed computing, including: Hadoop Core, our flagship sub-project, provides a distributed filesystem (HDFS) and support for the MapReduce distributed computing framework. HBase builds on Hadoop Core to provide a scalable, distributed database. Pig is a high-level data-flow language and execution framework for parallel computation. It is built on top of Hadoop Core. ZooKeeper is a highly available and reliable coordination system. Distributed applications use ZooKeeper to store and mediate updates for critical shared state. Hive is a data warehouse infrastructure built on Hadoop Core that provides data summarization, adhoc querying and analysis of datasets.