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Shell script to rebuild VirtualBox kernel extensions under Mac OS X
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OpenELEC (4.0.1) WIFI connection details using `connman`
Even though there is a nice XBMC add-on to configure your WIFI settings,
sometimes, you may still want to setup the WIFI connection for many reasons
or just for fur.
OpenELEC use connman for managing connection to the various
available network.
Setuping connman to connect to your protected WIFI network is an easy requiring
you only to create a config file and enter some commands in a shell.
A simple program for computing the Mandelbrot set.
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Turning PostgreSQL into a queue serving 10,000 jobs per second
Turning PostgreSQL into a queue serving 10,000 jobs per second
RDBMS-based job queues have been criticized recently for being unable to handle heavy loads. And they deserve it, to some extent, because the queries used to safely lock a job have been pretty hairy. SELECT FOR UPDATE followed by an UPDATE works fine at first, but then you add more workers, and each is trying to SELECT FOR UPDATE the same row (and maybe throwing NOWAIT in there, then catching the errors and retrying), and things slow down.
On top of that, they have to actually update the row to mark it as locked, so the rest of your workers are sitting there waiting while one of them propagates its lock to disk (and the disks of however many servers you're replicating to). QueueClassic got some mileage out of the novel idea of randomly picking a row near the front of the queue to lock, but I can't still seem to get more than an an extra few hundred jobs per second out of it under heavy load.
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This provides the endian conversion functions form endian.h on Windows, Linux, *BSD, Mac OS X, and QNX. You still need to use -std=gnu99 instead of -std=c99 for gcc. The functions might actually be macros. Functions: htobe16, htole16, be16toh, le16toh, htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh. License: I hereby put …
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This is a very simple git workflow. It (and variants) is in use by many people.
I settled on it after using it very effectively at Athena.
GitHub does something similar; Zach Holman mentioned it
in this talk.
Update: Woah, thanks for all the attention. Didn't expect this simple rant
to get popular.
Added WebFinger support to my email address using one rewrite rule and one static file.
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