Date: Sun, 6 Oct 2024 21:56:27 +0200 From: Marek Zarychta <zarychtam@plan-b.pwste.edu.pl> To: "David E. Cross" <david@crossfamilyweb.com>, FreeBSD Hackers <freebsd-hackers@freebsd.org> Subject: Re: Review D38047 ... and then there was one.... Message-ID: <6bfd6c61-38aa-4038-b54b-6c17b5b69ada@plan-b.pwste.edu.pl> In-Reply-To: <21941f7f-ce32-e277-a565-b1db3b3841ab@crossfamilyweb.com> References: <21941f7f-ce32-e277-a565-b1db3b3841ab@crossfamilyweb.com>
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W dniu 6.10.2024 o 20:35, David E. Cross pisze: > Please, love to get some eyes on this. As it stands nscd is > completely useless for LDAP for getgroupmembership (and really ANY > implementation that defines a specific implementation of > getgroupmembership, since it will then bypass the non-existent NSCD > version). Additionally it fixes bugs with negative caching as well as > increases thread safety. Thank you for this patch. I am not competent to review this code, but can test it. Really, our nscd with LDAP is a nightmare. I have set filters to narrow lookups, but with full directory, when nscd is runnig I have have such timings: [host] ~# /usr/bin/time getent passwd > /dev/null 0.62 real 0.06 user 0.15 sys [host] ~# /usr/bin/time getent passwd > /dev/null 0.47 real 0.07 user 0.12 sys [host] ~# /usr/bin/time getent passwd > /dev/null 0.46 real 0.04 user 0.15 sys After stopping nscd service: [host] ~# /usr/bin/time getent passwd > /dev/null 0.15 real 0.03 user 0.06 sys [host] ~# /usr/bin/time getent passwd > /dev/null 0.16 real 0.01 user 0.08 sys Unfortunately, with this patch applied there is no much improvement: [host] ~# /usr/bin/time getent passwd > /dev/null 0.65 real 0.03 user 0.19 sys [host] ~# /usr/bin/time getent passwd > /dev/null 0.48 real 0.02 user 0.22 sys [host] ~# /usr/bin/time getent passwd > /dev/null 0.43 real 0.06 user 0.12 sys The test were run on most recent stable/14 with net/nss-pam-ldapd as a Name Service Switch module for LDAP lookup. -- Marek Zarychta
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