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Re: Sharded FSFS repositories

From: <philipp.marek_at_bmlv.gv.at>
Date: 2007-03-22 19:19:54 CET

> My goal was to recreate what Malcolm had done based solely on his
> description above. But some of your ideas were interesting although they
> don't appear match what Malcolm has done.
Thank you.

> OK, I did that. The summary: no change. NTFS appears to be just as fast for
> this scenario as any other modern filesystem.
>
> Across 1024 file opens in a directory of 2^20 files, an average time
> (seconds) of 0.025 for not-sharded and 0.026 for sharded. See the attached
> scripts and log files for the details. I ran the read script three times,
> recording the 3rd iteration's time to minimize the impact of my slower
> laptop.
Your script has 2^12, which is 4096, in it.
Just out of interest: Could you post the complete log?
Dividing with 2^10 I get 25Ás per open. I have seen completely different results
... which Windows is that? Are you sure that you really have 1 024 076 files in
this directory?

Thank you for your efforts!

Regards,

Phil

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Received on Thu Mar 22 19:20:30 2007

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