Building Linux cluster for mechanical engineering software

 
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Special Forums UNIX and Linux Applications High Performance Computing Building Linux cluster for mechanical engineering software
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Old 10-08-2014
VNC on XWindows platforms creates a local virtual XWindow desktop that supports your choice of window managers, has low latency and can be viewed by a phelora of platform supporting viewers off your client machine of choice. I am using a JAVA viewer, as I lack local admin. The X tcp or unix sockets run inside the host for min laatency (unless you point off-host X clients to it), and a VNC socket connects the viewer. You can run the VNC tcp though an ssh tunnel for security.

Heterogenous clustering requires smarter load balancing and code compatability or porting. Java is portable, compared to C++/g++, which produces code specific to the CPU and O/S, but still is very widely available to compile locally compatible code.

VM makes sense. In practice, very few modern systems page much, and it makes the environment that much more robust. It can support huge sparse matrixes in an mmap()'d space, key to many problems.

Going highly parallel on cpu and ram suggest that net and file access will become bottlenecks, so yes, you need to put lots of work into making them as parallel as possible, too. Network fabric needs to be many path switches and high bandwidth. If you go fiber with either, remember that with its higher speeds comes higher latency, so problems may need to be structured to avoid that. Net and file have been becoming the same problem, as more and more file is remote from the host.
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GHI(1)							      General Commands Manual							    GHI(1)

NAME
ghi - command-line interface to the GitHub Issues API SYNOPSIS
ghi command [arguments] [options] DESCRIPTION
This manual page documents briefly the ghi command. ghi is a command-line interface to the GitHub Issues API. It can be used to access all of GitHub's documented Issues API (v2) functionality from the command line: open, close and manipulate issues. If no command is given, the default action is list. If a number is given instead, the default action is show. COMMANDS
list [ -s open|closed|all ] Show open, closed or all issues (choose with -s, see below). Default is open. show number Show issue number. This command can be invoked also as ghi <number>. open [ number ], o [ number ] Create a new issue, and launch $EDITOR. If number is given, reopens that issue. open -m message, o -m message Create a new issue with message content (optionally, use for new lines; first line will be the issue title). close number, c number Closes issue number. edit number, e number Edit issue number with $EDITOR. label add|remove label number Add or remove label to/from issue number. You can use al or rl instead of, respectively, label add and label remove. search term, s term Search for term. comment number, m number Create a comment for issue number (with $EDITOR). OPTIONS
-h, --help Show summary of options. -v, --verbose Show issue details (only for show, list and search commands). Default is false. -V, --version Show program's version number and exit. -s STATE, --state=STATE Specify state (only for list and search (except "all") commands). Choices are: open (o), closed (c), all (a). Default is open. -r REPO, --repo=REPO, --repository=REPO Specify a repository. The format: "user/repo" or just "repo" (latter will get the user from the global git config). -w, --web, --webbrowser Show issue(s) GitHub page in web browser (only for list and show commands). Default is false. AUTHOR
github-cli was written by Sander Smits <jhmsmits@gmail.com>. This manual page was written by David Paleino <dapal@debian.org>, for the Debian project (and may be used by others). April 13, 2010 GHI(1)