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Subject: Re: [ANNOUNCEMENT] TEST RELEASE: Cygwin 2.3.0-0.4
To: cygwin AT cygwin DOT com
References: <announce DOT 20151022162227 DOT GC5319 AT calimero DOT vinschen DOT de> <loom DOT 20151023T153449-500 AT post DOT gmane DOT org> <20151026100756 DOT GC31990 AT calimero DOT vinschen DOT de>
From: Achim Gratz <Stromeko AT Nexgo DOT DE>
Message-ID: <562E4ED0.7020907@Nexgo.DE>
Date: Mon, 26 Oct 2015 17:03:28 +0100
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Am 26.10.2015 um 11:07 schrieb Corinna Vinschen:
> Erm, really?  I tested this locally with a directory with hundreds
> of files, each of which belonged to another user or group, and that
> resulted in a 25% slowdown.  Not 1000%.  Oh boy.

That test is almost as bad as it can ever get.  Given that enumerating 
all AD accouts with mkpasswd takes about 2 hours and I'm doing something 
very similar here, I'm not even surprised.  I was more surprised to see 
the server go so fast, but my guess is that it can use jumbo frames to 
talk to the AD.

>> While that hurts, the more usual case with many files from the
>> same user doesn't feel any slower at the moment.  The access through VPN
>> will be interesting, though...
>
> Did you try this in the meantime?

No, sorry.

> Given the above result, I'm wondering if we can afford using AuthZ at
> all.  OTOH I don't see any other way to get the correct POSIX permissions
> from a non-Cygwin ACL :(

If you really want fast but incorrect there's always the "noacl" mount 
option.

-- 
Achim.

(on the road :-)

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