Hello Christian,
Wednesday, April 14, 2010, 8:30:50 AM, you wrote: CT> I don't think the transfer rate is actually that interesting. For small CT> but many transactions the seek time/spinning speed should have the CT> limiting influence. CT> I've run the attached script a couple of times on my notebook, here's CT> the results: CT> 0.11 909.090909091 CT> 0.15 666.666666667 CT> 0.2 500.0 CT> 0.07 1428.57142857 CT> 0.07 1428.57142857 CT> 0.14 714.285714286 CT> The initial runs are a bit lower as they were interfered with by other CT> applications writing to the disk. CT> It's a notebook w/ Intel P9600, Seagate 7.2k SATA drive, 4GB RAM, Ubuntu CT> 10.04, linux 2.6.32, ext4 Something is wrong with the seek time. Trying it on an Intel G1 80G SSD goes hardly over a 1000. NB, P7400 3GB RAM, ubuntu 9.10, ext4 0.14 714.285714286 0.14 714.285714286 0.1 1000.0 0.14 714.285714286 Just for fun, it's flying on a tmpfs 0.36 2777.77777778 0.37 2702.7027027 0.37 2702.7027027 Vmware makes it fly also: with 1000 runs on a 4GHz E8400, ubuntu 9.10, ext4 within VMware 0.24 4166.66666667 0.33 3030.3030303 0.26 3846.15384615 0.31 3225.80645161 0.29 3448.27586207 in the VM tmpfs does not boost a lot: 0.2 5000.0 0.2 5000.0 0.2 5000.0 0.19 5263.15789474 0.19 5263.15789474 -- Best regards, Adam GROSZER mailto:agros...@gmail.com -- Quote of the day: People seem to enjoy things more when they know a lot of other people have been left out of the pleasure. - Russell Baker _______________________________________________ For more information about ZODB, see the ZODB Wiki: http://www.zope.org/Wikis/ZODB/ ZODB-Dev mailing list - ZODB-Dev@zope.org https://mail.zope.org/mailman/listinfo/zodb-dev
