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---
format: rst
toc: no
...
=======================================
Miscellaneous Software Stuff
=======================================
Log Analysis
---------------
http://logstash.net/
Regular Expressions
---------------------
http://code.google.com/p/semicomplete/wiki/GrokDiscovery
http://txt2re.com/
Compression for Executables
---------------------------
UPX: Ultimate Packer for Executables http://upx.sourceforge.net/
Webmail
-------
the null webmail client http://www.nulllogic.ca/webmail/
Standard ML
-----------
`The SML Standard Basis (of types)
<http://www.soc.napier.ac.uk/~andrew/SMLBasis/sml-std-basis.html>`_
Mutually recursive function using 'and' syntax:
fun foo 0 = "beer car"
| foo n = bar(n-1)
and bar 0 = "bacon"
| bar n = foo(n-1);
Network programming in SML/NJ: https://github.com/tonyg/smlnj-networking/
plan9 and Inferno
--------------------
"Styx-on-a-Brick": networked LEGO device
http://doc.cat-v.org/inferno/4th_edition/styx-on-a-brick/
plan9 on a GuruPlug
http://plan9.bell-labs.com/wiki/plan9/guruplug/index.html
NoSQL
------
NoSQL Data Modeling Techniques
http://highlyscalable.wordpress.com/2012/03/01/nosql-data-modeling-techniques/
PHP Problems
--------------
[PHP: A fractal of bad design](http://me.veekun.com/blog/2012/04/09/php-a-fractal-of-bad-design/)
LISP Visualization
------------------
Nested boxes instead of nested parens: http://pretty-lisp.org/
Webmail
-------
Squirrel mail is ok, CiderWebmail looks better. Have had problems deploying
Alpine Webmail.
Structured Wikis
----------------
Circa May 2012 there are a few options for structured data in wikis:
*[Semantic MediaWiki](https://en.wikipedia.org/wiki/Semantic_MediaWiki)* is
probably the best option, though it is unfortunately in PHP. This is a series
of plugins/extensions to vanilla MediaWiki, which add editing (with or without
forms), querying, visualization, import/export, etc.
*MediaWiki with the [WikiDB](http://www.mediawiki.org/wiki/Extension:WikiDB)*
(PHP)
*DokuWiki with [data plugin](http://www.dokuwiki.org/plugin:data)* (PHP)
*eLog* could be used to collaboratively edit simple data.
*TWiki* has structured data features and an input form (Perl).
DBPedia uses [custom extraction
tools](http://wiki.dbpedia.org/Documentation?v=6hz) for MediaWiki written in
Scala. dbpedialite uses just calls the Wikipedia API (Ruby).
You can [search](http://www.wikimatrix.org/search.php?sid=54395) wikimatrix for
wiki engines which have a "structured data" feature.
Semantic Data Publishing
------------------------
[OntoWiki](http://ontowiki.net/Projects/OntoWiki/Features)
[Google Refine](https://en.wikipedia.org/wiki/Google_Refine) (formerly known as
Freebase Gridworks) seems pretty useful for "cleaning up" datasets. It's a Java
"workstation" app with a web/http interface.
USB Performance Issues
----------------------
Parallelized mass storage transfers are much slower than serialized:
http://blog.dinkevich.com/why-usb-transfers-are-slow/
Inkscape Black Rectangle Box Issue
-------------------------------------
For some reason Inkscape sometimes inserts a black box into .svg files which
are invisible within Inkscape but visible when exported.
To remove this box, edit the raw XML using the XML Editor in Inkscape
(Shift-Ctrl-X), look for an svg:flowRoot element within the first layer, and
delete it.
Latency Numbers
-----------------
From https://gist.github.com/2841832::
L1 cache reference 0.5 ns
Branch mispredict 5 ns
L2 cache reference 7 ns 14x L1 cache
Mutex lock/unlock 25 ns
Main memory reference 100 ns 20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy 3,000 ns
Send 1K bytes over 1 Gbps network 10,000 ns 0.01 ms
Read 4K randomly from SSD* 150,000 ns 0.15 ms
Read 1 MB sequentially from memory 250,000 ns 0.25 ms
Round trip within same datacenter 500,000 ns 0.5 ms
Read 1 MB sequentially from SSD* 1,000,000 ns 1 ms 4X memory
Disk seek 10,000,000 ns 10 ms 20x datacenter roundtrip
Read 1 MB sequentially from disk 20,000,000 ns 20 ms 80x memory, 20X SSD
Send packet CA->Netherlands->CA 150,000,000 ns 150 ms
Notes:
1 ns = 10-9 seconds
1 ms = 10-3 seconds
* Assuming ~1GB/sec SSD
Great Hacks
----------------
HTML as image: http://lcamtuf.coredump.cx/squirrel/
xscreensaver
-------------
To lock the screen immediately, do:
xscreensaver-command -lock
Lua Tools
-------------
http://haserl.sourceforge.net/ "Dynamic web content in 20K"
Semantic Wiki Setup Notes
---------------------------
There is a [](Semantic MediaWiki quick reference), as well as good
documentation of the
[http://www.mediawiki.org/wiki/Extension:Semantic_Forms/Quick_start_guide](Semantic
Forms) plugin.
[http://www.mediawiki.org/wiki/Extension:External_Data](External Data) plugin
allows remote import of data via HTTP API call (cached) or file upload (eg,
XML, csv).
"The djb Way"
--------------
[Dan Bernstein](http://cr.yp.to/djb.html) writes a lot of network daemons in a
unique style. Eg, daemontools, ucspi-tcp, djbdns, qmail, and publicfile.
- [The djb way](http://thedjbway.b0llix.net/readme.html)
|
