<div>Hi,</div>
<div> </div>
<div>As discussed with Zooko on IRC:</div>
<div>For people who are sharing a server on Pubgrid, please do not change your Tahoe-LAFS version until ticket 1170 [1] is done.</div>
<div>Because of performance tests</div>
<div> </div>
<div>@+</div>
<div>Fred<br></div>
<div>[1] <a href="http://tahoe-lafs.org/trac/tahoe-lafs/ticket/1170">http://tahoe-lafs.org/trac/tahoe-lafs/ticket/1170</a></div>
<div><br> </div>
<div class="gmail_quote">2010/8/13 Wayne Scott <span dir="ltr"><<a href="mailto:wsc9tt@gmail.com">wsc9tt@gmail.com</a>></span><br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">Does it matter what version the machine in the cluster are running?
<div><br></div>
<div><font color="#888888">-Wayne</font>
<div>
<div></div>
<div class="h5"><br><br>
<div class="gmail_quote">On Fri, Aug 13, 2010 at 2:51 PM, Zooko O'Whielacronx <span dir="ltr"><<a href="mailto:zooko@zooko.com" target="_blank">zooko@zooko.com</a>></span> wrote:<br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">Folks:<br><br>It seems like Tahoe-LAFS v1.8.0c2 downloads this movie file:<br><br><a href="http://127.0.0.1:3456/file/URI%3ACHK%3A4klgnafrwsm2nx3bqy24ygac5a%3Acrz7nhthi4bevzrug6xwgif2vhiacp7wk2cfmjutoz2ns3w45qza%3A3%3A10%3A1490710513/@@named=/bbb-360p24.i420.lossless.drc.ogg.fixed.ogg%2Bbbb-24fps.flac.via-ffmpeg.ogg" target="_blank">http://127.0.0.1:3456/file/URI%3ACHK%3A4klgnafrwsm2nx3bqy24ygac5a%3Acrz7nhthi4bevzrug6xwgif2vhiacp7wk2cfmjutoz2ns3w45qza%3A3%3A10%3A1490710513/@@named=/bbb-360p24.i420.lossless.drc.ogg.fixed.ogg%2Bbbb-24fps.flac.via-ffmpeg.ogg</a><br>
<br>About 1/3 as fast as Tahoe-LAFS v1.7.1 downloads the same file from<br>the same grid (the public Test Grid circa today).<br><br>We're investigating (see ticket #1170 for our progress) and we might<br>delay the final release of Tahoe-LAFS v1.8.0 (previously planned for<br>
August 15 -- this Sunday). This might turn out to require a patch<br>added on top of Tahoe-LAFS v1.8.0c2 to make it so it isn't such a<br>significant performance regression in this case. Or it might turn out<br>that this is a really peculiar situation which will almost never occur<br>
for any other user and we'll decide to release v1.8.0c2 as v1.8.0<br>final.<br><br>If you care about immutable download performance, please compare<br>v1.8.0c2 to v1.7.1 on your network with your files! And report your<br>
results to this list. Nathan Eisenberg has done so [1], and shown that<br>v1.8.0c1 was substantially *faster* than v1.7.1 for his tests. (Note<br>that 1.8.0c1 and 1.8.0c2 are identical with regard to immutable file<br>download speed.) Earlier Kyle Markley did some benchmarking of v1.7.1<br>
[2, 3, 4, 5, 6, 7, 8, 9], but nobody has yet replicated his experiment<br>using v1.8.0c2. I have done quite a bit of benchmarking this one<br>particular file from my office (SimpleGeo) and home, and my results<br>are all on #1170.<br>
<br>Regards,<br><br>Zooko<br><br>[1] <a href="http://tahoe-lafs.org/pipermail/tahoe-dev/2010-August/004930.html" target="_blank">http://tahoe-lafs.org/pipermail/tahoe-dev/2010-August/004930.html</a><br>[2] <a href="http://tahoe-lafs.org/pipermail/tahoe-dev/2010-July/004776.html" target="_blank">http://tahoe-lafs.org/pipermail/tahoe-dev/2010-July/004776.html</a><br>
[3] <a href="http://tahoe-lafs.org/pipermail/tahoe-dev/2010-July/004781.html" target="_blank">http://tahoe-lafs.org/pipermail/tahoe-dev/2010-July/004781.html</a><br>[4] <a href="http://tahoe-lafs.org/pipermail/tahoe-dev/2010-July/004782.html" target="_blank">http://tahoe-lafs.org/pipermail/tahoe-dev/2010-July/004782.html</a><br>
[5] <a href="http://tahoe-lafs.org/pipermail/tahoe-dev/2010-July/004786.html" target="_blank">http://tahoe-lafs.org/pipermail/tahoe-dev/2010-July/004786.html</a><br>[6] <a href="http://tahoe-lafs.org/pipermail/tahoe-dev/2010-July/004811.html" target="_blank">http://tahoe-lafs.org/pipermail/tahoe-dev/2010-July/004811.html</a><br>
[7] <a href="http://tahoe-lafs.org/pipermail/tahoe-dev/2010-July/004808.html" target="_blank">http://tahoe-lafs.org/pipermail/tahoe-dev/2010-July/004808.html</a><br>[8] <a href="http://tahoe-lafs.org/pipermail/tahoe-dev/2010-July/004838.html" target="_blank">http://tahoe-lafs.org/pipermail/tahoe-dev/2010-July/004838.html</a><br>
[9] <a href="http://tahoe-lafs.org/pipermail/tahoe-dev/2010-August/004853.html" target="_blank">http://tahoe-lafs.org/pipermail/tahoe-dev/2010-August/004853.html</a><br><br><a href="http://tahoe-lafs.org/trac/tahoe-lafs/ticket/1170#" target="_blank">http://tahoe-lafs.org/trac/tahoe-lafs/ticket/1170#</a> does new-downloader<br>
perform badly for certain situations (such as today's Test Grid)?<br>_______________________________________________<br>tahoe-dev mailing list<br><a href="mailto:tahoe-dev@tahoe-lafs.org" target="_blank">tahoe-dev@tahoe-lafs.org</a><br>
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<br></blockquote></div><br>