Dapper Dataflow Engine 0.92 (Default branch)


 
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Special Forums UNIX and Linux Applications Virtualization and Cloud Computing Dapper Dataflow Engine 0.92 (Default branch)
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Old 08-18-2008
Dapper Dataflow Engine 0.92 (Default branch)

Image Dapper, or "Distributed and Parallel Program Execution Runtime", is a tool for taming the complexities of developing for large-scale cloud and grid computing, enabling the user to create distributed computations from the essentials: the code that will execute, along with a dataflow graph description. It supports rich execution semantics, carefree deployment, a robust control protocol, modification of the dataflow graph at runtime, and an intuitive user interface. License: GNU Lesser General Public License (LGPL) Changes:
On the fly generation and aliasing of dataflow graph edges are now possible. The API has been simplified, and redundant interfaces have been done away with; at the same time, dataflow graphs are now robust to tampering from malicious users. The concept of execution domain has been introduced to control what executes where. The manual is now substantially complete, and has been updated with a bevy of examples and diagrams. The SourceForge mailing lists dapper-user and dapper-announce have been created.Image

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GRDINFO(l)																GRDINFO(l)

NAME
grdinfo - Get information about the contents of a 2-D grd file SYNOPSIS
grdinfo grdfiles [ -C ] [ -D ] [ -F ] [ -L1 ] [ -L2 ] [ -M ] [ -V ] DESCRIPTION
grdinfo reads a 2-D binary grd file and reports various statistics for the (x,y,z) data in the grdfile. The output information contains the minimum/maximum values for x, y, and z, where the min/max of z occur, the x- and y-increments, and the number of x and y nodes, and [optionally] the mean, standard deviation, and/or the median, L1 scale of z, and number of nodes set to NaN. grdfile The name of one or several 2-D grd files. OPTIONS
No space between the option flag and the associated arguments. -C Formats the report using tab-separated fields on a single line. The output is w e s n z0 z1 dx dy nx ny [ x0 y0 x1 y1 ] [ med scale ] [ mean std rms] [n_nan]. The data in brackets are output only if the corresponding options -M, -L1, -L2, and -M are used, respec- tively. -D Report grid domain and x/y-increments using dd:mm:ss[.fff] notation [Default is decimal]. Does not apply to the -C option. -F Report grid domain and x/y-increments world mapping format [Default is generic]. Does not apply to the -C option. -L1 Report median and L1 scale of z (L1 scale = 1.4826 * Median Absolute Deviation (MAD)). -L2 Report mean and standard deviation of z. -M Find and report the location of min/max z-values, and count and report the number of nodes set to NaN, if any. -V Selects verbose mode, which will send progress reports to stderr [Default runs "silently"]. EXAMPLES
To obtain all the information about the data set in file hawaii_topo.grd, try grdinfo -L1 -L2 -M hawaii_topo.grd SEE ALSO
gmt(1gmt), grd2cpt(1gmt), grd2xyz(1gmt), grdedit(1gmt) 1 Jan 2004 GRDINFO(l)