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Mac Pro (Early 2009) 2.66–3.33 4×256 8 1 4 Yes Yes Yes March 2009 July 2010 Xeon 5500 ("Gainestown") Mac Pro (Early 2009) 2.26–2.93 4×256 8 2 4 Yes Yes Yes March 2009 August 2010 Xserve (Early 2009) 2.26–3.33 4×256 8 1–2 4 Yes Yes Yes April 2009 January 2011 Core i5 ("Lynnfield") iMac (Late 2009) 2.66–2.80 4×256 8 1 4 No No Yes
[4]: 114 A DataFrame is a 2-dimensional data structure of rows and columns, similar to a spreadsheet, and analogous to a Python dictionary mapping column names (keys) to Series (values), with each Series sharing an index. [4]: 115 DataFrames can be concatenated together or "merged" on columns or indices in a manner similar to joins in SQL.
Hierarchical Data Format (HDF) is a set of file formats (HDF4, HDF5) designed to store and organize large amounts of data.Originally developed at the U.S. National Center for Supercomputing Applications, it is supported by The HDF Group, a non-profit corporation whose mission is to ensure continued development of HDF5 technologies and the continued accessibility of data stored in HDF.
1 year, 5 months 1987 January 1, 1987 Macintosh Plus (Platinum) Compact: October 15, 1990 3 years, 9 months February 3, 1987 Macintosh SE: Compact: August 1, 1989 2 years, 5 months March 2, 1987 Macintosh II: Mac II: January 15, 1990 1988 September 19, 1988 Macintosh IIx: Mac II: October 15, 1990 1989 January 19, 1989 Macintosh SE/30: Compact ...
The current product lineup includes the MacBook Air and MacBook Pro laptops, and the iMac, Mac Mini, Mac Studio, and Mac Pro desktops. Macs are sold with Apple's proprietary macOS operating system , which is not licensed to other manufacturers and exclusively bundled with Mac computers.
The Dataframe API was released as an abstraction on top of the RDD, followed by the Dataset API. In Spark 1.x, the RDD was the primary application programming interface (API), but as of Spark 2.x use of the Dataset API is encouraged [3] even though the RDD API is not deprecated. [4] [5] The RDD technology still underlies the Dataset API. [6] [7]
Linux is a Unix-like computer operating system assembled under the model of free and open-source software development and distribution. Most Linux distributions, as collections of software based around the Linux kernel and often around a package management system, provide complete LAMP setups through
An early server computing version of the system was released in 1999 as a technology preview. It was followed by several more official server-based releases. Server functionality has instead been offered as an add-on for the desktop system since 2011. [15] Mac OS X Server 1.0 – code named "Hera", released in 1999