SV: Scaling of ctdb & DNS round robin and scaling of pdc

Morten Bøhmer Morten.Bohmer at
Thu Oct 25 03:23:04 MDT 2012


I am not entirely sure how Samba works in regards to domain controllers, my network has "real" MS Windows 2008 domain controllers and I am only using my CTDB cluster as a member server. I would suggest that any other tasks related to SMB/PDC is wise to offload to another machine, be it a real MS Windows or Samba PDC.


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Fra: samba-technical-bounces at [mailto:samba-technical-bounces at] På vegne av Johannes Amorosa | Celluloid VFX
Sendt: 25. oktober 2012 10:29
Til: samba-technical at
Emne: Scaling of ctdb & DNS round robin and scaling of pdc

Hello List,
I hope this is the right place to ask - I have two questions:

1. In the ctdb wiki it is recommended to use dns round robin for loadbalancing.
I'm quite new to this - how does samba handle a "session". We need massive I/O for our setup and considering ctdb to avoid our smb bottleneck. When is the client getting a "different" IP- Address? 
Everytime a file is read or stored - our every morning when you log into your workstation. If this is the case then loadbalancing would be quite random. The scaling figures in one of the PDFs are impressive - are these "artifical" benchmark tests or real life scaling?

2. Can the PDC be a bottleneck. Can I avoid this with samba 4 and integrated PDC? I would like to here your opinion

Thank you for your time.

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