[Samba] ldap owncloud and samba ad

[Micha Ballmann via samba]

Hello,

im authenticating my Owncloud aigainst one of my three domain controller
and add a second one of it as failover. The authentication works pretty
well. When im trying to share files or folders i have the problem, that
it takes a lot of time until i get the username i want to share.
Compared to my open ldap the samba4 ad needs about 10-15 seconds more to
find a result, thats pretty stressful if you want to share for serveral
users.

I hope you can help me to speed up :-D.

Best regards,

Micha

[Andrew Bartlett via samba]

Post by Micha Ballmann via samba
Hello,
im authenticating my Owncloud aigainst one of my three domain
controller 
and add a second one of it as failover. The authentication works
pretty 
well. When im trying to share files or folders i have the problem,
that 
it takes a lot of time until i get the username i want to share. 
Compared to my open ldap the samba4 ad needs about 10-15 seconds more
to 
find a result, thats pretty stressful if you want to share
for  serveral 
users.

Indeed.

Post by Micha Ballmann via samba
I hope you can help me to speed up :-D.

I don't have any silver bullets, but Samba 4.6 will be a little faster
than previous versions. The big improvement normally comes from
working out what search expressions are in use and ensuring they always
use an index.

Samba sadly still uses a single process for all LDAP, and this can be a
bottleneck.

If you build from source with debugging symbols, then a 'linux perf'
flame graph per
http://www.brendangregg.com/FlameGraphs/cpuflamegraphs.html can help a
lot with understanding what is slow.

I hope this helps,

Andrew Bartlett