[ZODB-Dev] Using zodb and blobs

[Christian Theune]

On 04/15/2010 06:00 PM, Adam GROSZER wrote:
> 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.

Well, sounds like a broken fsync then. :/

-- 
Christian Theune · ct at gocept.com
gocept gmbh & co. kg · forsterstraße 29 · 06112 halle (saale) · germany
http://gocept.com · tel +49 345 1229889 0 · fax +49 345 1229889 1
Zope and Plone consulting and development

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