Ibis: Scaling the Python Data Experience
Ibis 0.5 (September 10, 2015)
Ibis 0.5.0 is released. Read all about it
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What is Ibis?
Ibis is a new Python data analysis framework with the goal of enabling data scientists and data engineers to be as productive working with big data as they are working with small and medium data today. In doing so, we will enable Python to become a true first-class language for Apache Hadoop, without compromises in functionality, usability, or performance. Having spent much of the last decade improving the usability of the single-node Python experience (with pandas and other projects), we are looking to achieve:
100% Python end-to-end user workflows
Native hardware speeds for a broad set of use cases
Full-fidelity data analysis without extractions or sampling
Scalability for big data
Integration with the existing Python data ecosystem (pandas, scikit-learn, NumPy, and so on)
Ibis Vision and Roadmap
Ibis is being designed to take advantage of architectural synergies with theImpala project that will enable high performance Python at massive scale without serialization or other interface bottlenecks. Specifically, we have on the roadmap:
Support for Impala’s forthcoming complex types: lists, maps, and structs as first-class value types.
Fast Python API for a canonical in-memory columnar data format being developed for Impala and to be standardized amongst software components.
Enabling intepreted Python user-defined functions to be run on Impala nodes and perform computations directly on columnar data in shared memory without any need for deserialization. This will enable users to leverage theexisting Python data ecosystem, both tools and libraries, at performance and scale never seen before.
Expanding the useful set of Python that can be translated to LLVM IR to achieve true native performance at scale on complex data within Impala.
Exposing machine learning functionality already available in MADLib.
This current version of Ibis includes a great deal of useful big data functionality, putting Impala, the open source interactive SQL-on-Hadoop engine, right at your fingertips in Python:
A pandas-like data expression system providing comprehensive coverage of the functionality already provided by Impala. It is composable and semantically complete; if you can write it with SQL, you can write it with Ibis, often with substantially less code. This even includes such tricky relational data concepts as
Window functions
Correlated and uncorrelated subqueries
Self-joins
High level analytics tools like bucketing, top-k, histogram, and value_counts.
Tools for performing computations directly on datasets in HDFS, hiding the low-level details of Impala for accessing such data.
Tools to simplify interactions with HDFS
Interoperability with pandas: executing expressions returns pandas objects, and pandas objects can be written back to HDFS (experimental).
It’s possible to support other compute engines in Ibis, or SQL databases like PostgreSQL. In particular, Ibis’s data expressions are decoupled from the Impala expression executor/compiler. We welcome community contributions to integrate Ibis with other backend systems. Keep in mind that it’s a design goal of Ibis to hide as much of backend complexity as possible.
Copyright 2015, Cloudera, Inc.
来源：oschina
链接：https://my.oschina.net/u/2306127/blog/600302