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26 Mon, 12 Apr 2010 17:24:35 +0200
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27 From: "Sebastian Spaeth" <Sebastian@SSpaeth.de>
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28 To: Jameson Rollins <jrollins@finestructure.net>, Notmuch list
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29 <notmuch@notmuchmail.org>
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30 Subject: Re: please eat my data!
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31 In-Reply-To: <87tyrgeopc.fsf@servo.finestructure.net>
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32 References: <87633wlrrk.fsf@SSpaeth.de>
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33 <87tyrgeopc.fsf@servo.finestructure.net>
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34 Date: Mon, 12 Apr 2010 17:24:35 +0200
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35 Message-ID: <87iq7wpubw.fsf@SSpaeth.de>
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53 On 2010-04-12, Jameson Rollins wrote:
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54 > On Mon, 12 Apr 2010 15:33:35 +0200, "Sebastian Spaeth" > Wow, this is really interesting, Sebastian. For those of us not in the
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55 > know, can you explain what libeatmydata is and how it's used?
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57 Hehe, I just got the pointer to it on IRC myself:
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59 http://www.flamingspork.com/projects/libeatmydata/
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61 You download and untar the thing, and "make" it, which produces
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62 libeatmydata.so. Running a binary foo with LD_PRELOAD=./libeatmydata.so foo
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63 will then effectively make all fsyncs a Noop. Not something you want on
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64 your production systems, but great to test how much of a penality those
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67 What I find intersting is that we have a 2x speedup and a 10x speedup
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68 for different queries. Olly was saying on IRC that both *should* really be
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69 behaving in much the same manner.
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