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"Daemon best practices in Ruby?"
- We haven't tried DaemonKit
- SimpleDaemon is what we currently use, which we suspect of interfering with monit (had problems with multiple instances starting, and process not starting upon reboot).
- A couple of people suggested looking at Daemonize
- Always monitor daemons with sanity checks (e.g. memory usage); use Monit or God
- Roll your own?
"cut doesn't handle strange characters in large (5GB) text file, are there other unix commands for text file manipulation that are utf-8 compliant?"
- Try
awk/sedmaybe - Try using
od/hexdumpto figure out what the weird characters are
UPDATE 01/14/2009: Chad's corrections
Cut should be locale sensitive. Sed and Awk certainly are. Have you tried anything like:
LC_ALL=en_US.utf8 cut -n ....
I'm in the office in row closest to the ping pong table. Find me if you want to ask questions.
Cheers!
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In other news, what's wrong with the daemons gem? I've used it in the past, and http://blog.rapleaf.com/dev/?p=19 resolves my key complaint.
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Couple of corrections/comments:
@Kyle: I had tried the Daemons gem in the past - I forgot about it. However, it does seem too complex - multiple layers of forked out of concern over security, which we don't care about in this case.
Our current plan (at the suggestion of Brian Takita) is to write a simple loop in ruby that just drops a pid. He claims this will work fine with monit.
-- Chad
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@Chad: Updated the post, sorry :)
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The problem with "cut" turned out to be we were IN utf8 mode. Our data provider apparently ran out of standard ASCII characters for a single byte field of theirs and started using values above 127. So all the unix tools were seeing these as multi-byte characters and then eating the next character or so.
Switching the terminal to ASCII mode solved our problems (go figure)
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Depending on the complexity of the daemon, EventMachine could be a good choice as well.
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I cant remember what went wrong with daemonize but I remember I could not seem to get it working correctly
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