tor-webwml.git

@@ -348,9 +348,51 @@ implementation and testing work on January 15, 2009.

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-    Dec 08

+    <a id="Dec08"></a>

+    <a class="anchor" href="#Dec08">Dec 08</a>

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+    <small><em>Part of the last 30 days has been used to fix bugs that have

+    influenced the previous hidden service measurements. The first <a

+    href="http://archives.seul.org/or/cvs/Nov-2008/msg00100.html">bugfix</a>

+    corrects a possible segmentation fault that was very likely responsible

+    for a number of failed measurement runs. Another <a

+    href="https://bugs.torproject.org/flyspray/index.php?id=847&do=details">bug</a>

+    could be explained that lead to significant delays in bootstrapping:

+    Very slow directory authorities occupied bootstrapping clients for

+    a long time before clients finally gave up and bootstrapped using

+    another authority. As a result, the slowest two directory authorities

+    have dedicated more bandwidth to their nodes, so that the effect is

+    mitigated. A third <a

+    href="https://bugs.torproject.org/flyspray/index.php?id=874&do=details">bug</a>

+    has been introduced with the hidden service performance improvements in

+    November; the effect was that Tor processes running hidden services

+    would stop advertising their service upon reloading their

+    configuration. Further, this bug has uncovered that Tor has

+    re-established its introduction points upon reloading, which might have

+    affected hidden service stability. This bug has been fixed and will be

+    included in the upcoming version 0.2.1.9-alpha.</em></small>

+    <br/>

+    <small><em>Apart from fixing bugs, new measurements have been performed

+    between December 8 and 10. These will very likely be the final

+    measurements to compare hidden service performance now with the

+    beginning of the project. The data have not been completely evaluated,

+    so it is difficult to make a statement about improvements at this

+    point. However, a <a

+    href="http://freehaven.net/~karsten/hidserv/prelimreport-2008-12-15.pdf">preliminary

+    evaluation</a> shows that service publication times have improved

+    significantly. This is a result of Tor clients bootstrapping faster and

+    of the performance improvements added in November. In contrast to this,

+    the results for establishing a connection to a hidden service are less

+    promising. While the improvements added in November seem to have a

+    positive effect on performance, some substeps exhibit significantly

+    worse performance. One example is fetching hidden service descriptors

+    in order to contact a hidden service. A possible explanation is that

+    the sudden increase in the number of hidden service directory nodes in

+    September has had a negative effect on performance. Part of the work in

+    the final 31 days will be to evaluate these data in more detail and

+    make a final conclusion on the achievements of this

+    project.</em></small>

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