It is increasingly important for desktop applications to be able to easily execute codes, feed them input data, and ultimately collect, ingest, and analyze output data. In many scientific domains, it is not feasible to run these codes exclusively on the desktop, and so there is a need to have a simple way of directing the execution of third party codes both locally and on more powerful remote computational resources such as supercomputers, clusters, and cloud instances. The MoleQueue application is an open-source project that addresses this issue and provides integration of heterogeneous computational resources for desktop applications.
Thanks to Pillsy and Will Robertson for the MASH plug! Here's the relevant StackOverflow question: Call a Mathematica program from the command line, with command-line args, stdin, stdout, and stderr. If you don't use MASH, you may want to use the following utility functions that MASH defines.
MoleQueue is an open-source, cross-platform, system-tray resident desktop application for abstracting, managing, and coordinating the execution of tasks both locally and on remote computational resources. It is built and tested on Linux, Mac OS X, and Windows, with nightly binaries currently available for Mac OS X and Windows. Users can set up local and remote queues that describe where the task will be executed. Each queue can have programs, with templates to facilitate the execution of the program. Input files can be staged, and output files collected using a standard interface.
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The MoleQueue application is written in C++ using the Qt framework. It can execute programs directly on the local machine, and uses SSH to communicate with remote batch scheduling systems with support for Open Grid Scheduler (formerly Sun Grid Engine) and PBS. The backend communication is abstracted, and support is currently being added for UIT (a SOAP protocol for communicating with military HPC resources using ezHPC).
For desktop clients wishing to run jobs, there are a number of options available for submitting, querying, and retrieving job results. The MoleQueue application starts a local server listening on a named local socket (respecting standard user file permissions), which uses the JSON-RPC 2.0 specification to communicate. This can be used directly or through a C++ Qt interface that offers a standard signal/slot interface for GUI applications. There is a pure Python client written using ZeroMQ over local sockets, which can also be used from applications already making use of ZeroMQ. As local sockets and JSON are both widely-supported in a large array of languages, adding new code to your application is not difficult and the available methods are detailed on the relevant wiki pages.
Users are presented with a minimal Qt-based user interface where they can configure queues and programs, and inspect the status of the queue(s). Logging is provided so that any problems can be examined and diagnosed, and right-client context menu integration of other desktop clients can be used to analyze results. The MoleQueue application is evolving rapidly, and being used in several projects being developed at Kitware for effectively integrating simulation and calculation codes with pre- and post-processing applications used in the scientific discovery process.
Home > Articles > Apple > Operating Systems
␡- The Layers of Mac OS X: Aqua
This chapter is from the book
This chapter is from the book
There is more than one way to think about dividing up a pizza. First, there is the familiar method of dividing it into slices. Alternatively, you could divide it into layers: topping, cheese, sauce, crust. Theoretically, you could also divide it into its basic ingredients: flour, water, tomatoes, garlic, milk. Each method makes a different contribution to your enjoyment of the pizza. Well race mac os. The first method (slices) is best when you're getting ready to eat the pizza; the second is best when you are deciding what to order (such as pepperoni with extra cheese); the third is best if you are concerned about nutrition (needing to know the exact ingredients to calculate calories).
The same is true for Mac OS X. There are multiple ways to look at it and take it apart. Each way makes its own contribution to your understanding of the OS. In this chapter, I look at the major ways to 'take apart' Mac OS X. Having at least a minimal knowledge of Mac OS 9 will help, as I occasionally make comparisons between the two OS versions. But even if you've never used Mac OS 9, you'll be able to follow along.
In This Chapter
The Layers of Mac OS X: Aqua
The Layers of Mac OS X: Application Environments
Cocoa
Carbon
Classic
Java
Putting it together
The Layers of Mac OS X: Graphics Services
Quartz
Multimedia: OpenGL and QuickTime
The Layers of Mac OS X: Darwin
Mole Mash Mac Os Catalina
Mach
BSD (Unix)
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Domains: An Overview
System domain
Local domain
User domain
Network domain
The Libraries of Mac OS X: /System/Library
Core Services
CFMSupport
Extensions
Fonts
Frameworks
PreferencePanes
Printers
QuickTime
ScreenSavers
Services
Sounds
StartupItems
The Libraries of Mac OS X: /Library
Mole Mash Mac Os Download
Application Support
ColorSync
Contextual Menu Items
Desktop Pictures
Documentation
Fonts
Internet Plug-Ins
Modem Scripts
Preferences
Printers
Receipts
StartupItems
The Libraries of Mac OS X: Users/'Home'/Library
Application Support
Caches
Favorites
Font Collections
Fonts
Internet Search Sites
Keychains
Preference Panes
Preferences
Application-specific folders
Fonts in Mac OS X: Font Formats
TrueType fonts
PostScript fonts
OpenType fonts
Bitmap fonts
Identifying font formats
Fonts in Mac OS X: Working with Fonts
Font Panel window
Font smoothing and Mac OS X
International language support: basics
International language support: troubleshooting
Font utilities
The Layers of Mac OS X: Aqua
Aqua is the name given to what most users think of when they think of Mac OS X: the user interface, the Finder, the Dock, the windows, the translucent buttons, the high-resolution icons, the menus, and all the rest. Many users may never explore Mac OS X beyond its Aqua layer.
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From this perspective, a user upgrading from Mac OS 9 will feel quite at home, at least initially. Much still works the same way. You still double-click icons in the Finder to launch them; you still choose the Save command from an application's File menu to save a document; you still open a folder icon to see its contents.
But you will soon notice some significant differences: a new column view, a very different Apple menu, the Dock. I discussed the basics in Chapter 3, when I presented an overview of Mac OS X.