On 29 Jul, 2013, at 1:13 PM, Andrew Bartlett <abart...@samba.org> wrote:
> On Sat, 2013-07-27 at 23:20 +0800, Kinglok, Fong wrote: >> Dear all, >> >> After using samba 3 for two years, I have just spent totally one week >> finishing setting up a samba 4 file system in my working school. >> There are about 200 computers, 80+ staff, 1000 students and 10 >> printers. The AD was properly setup, mandatory profile and one GPO >> policy (which is printer download trust) is effective for all users. >> Logon script is for mapping four shares and 10 printers from the file >> server. Also, I have setup two additional DCs (with AD replication >> and DHCP server) for two other subnets in the hope to speed up the >> logon process. >> >> The benefits of Samba 4 are clear: more robust file serving >> (supporting the windows ACL), speedy printing (with the help of point >> and printer driver) and administration of AD through with windows >> remote admin tool. However, logon speed is just far from good. >> >> In the days of Samba 3.6, users can logon the system within 20 >> seconds, even with more than 80 users logon in the same time (two >> classes students login during computer lesson). Now, with only one >> user logging in (who is me), it takes nearly 60 seconds to do the >> logon. I have tried disabling drive and printer mapping in logon >> script and applying a registry hack (note 1) shorten the profile >> waiting time in windows 7 client side but it makes no difference in >> logon speed. >> >> I have taken a look on the document in sambaXP 2013: >> http://sambaxp.org/fileadmin/user_upload/SambaXP2013-DATA/thu/track1/Matthieu_Patou-Smaller_Faster_Scalier.pdf >> >> and two thread in samba-technical mailing list: >> https://lists.samba.org/archive/samba-technical/2013-January/089755.html >> https://lists.samba.org/archive/samba-technical/2013-May/092332.html >> >> It seems that samba team is doing some great work in spotting the >> unindexed search in LDB as one of block in performance. > > It is one block, but it is the one we expect to really hit at around > 10000, not 1000-2000. As Richard has indicated, what we need from you > is an indication of what operation is slow. Timeouts of this order > indicate something different to a slow database - they indicate things > like DNS timeing out. > > Once you work out which specific operation is blocking, we can > investigate more - be it in regards to your network, or our code, we > don't mind either way, but we need to work out which to look into. > > Andrew Bartlett > > -- > Andrew Bartlett > http://samba.org/~abartlet/ > Authentication Developer, Samba Team http://samba.org > Samba Developer, Catalyst IT http://catalyst.net.nz > > Thank you all for responding. In these days, I am trying hard to understand the reason of the delay in logon. Following your advice, I've done some test on 1. Profile deploying 2. GPO For the first one, I try using roaming profile for one testing user, it turns out 7 seconds to logon the system. It seems that the culprit of the delay is in the my old mandatory profile. For the second one, I try disable all GPO (I only enable point and printer driver trust and folder redirection), turning it on / off does not change the logon time significantly. So, I try digging into how to create mandatory profile properly once again. Here I found: http://oakdome.com/k5/tutorials/windows-7-mandatory-roaming-profile.php By following the link's instruction, I found it needs 20 seconds in logon. I hope I can further decrease the logon time (anyone got a hint?) I will keep updating the list if I found something worth sharing. Thanks. Kinglok, Fong
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