Re: [Samba] Samba4 consumes more CPU
Dear Andrew, As per your suggestion , I have attached the gdb log of the samba and smbd process log running in the single server mode. Also when I noted in the perf top, libndr.so consumes the maximum cpu. I noticed that it happens soon after sometime the samba process is started and the CPU is filled up. Since the samba process occupies 100% atleast two or more CPUs out of 8 CPU , the clients are not able to get authenticate to the server. Kindly go through the logs and suggest what can be done to lessen the CPU consumption. On Mon, Aug 12, 2013 at 11:45 AM, Andrew Bartlett wrote: > On Sun, 2013-08-11 at 10:12 +0530, Prema wrote: > > > > Also one more point I would like to clarify., what is the maximum > > User limit that Samba4 as a DC supports. > > > > I read somewhere that , there is a proportion between the system RAM + > > hard disk size and user limit accepted in Samba4. > > > > Is that true., and in that case, how many users can be supported by a > > 8 GB RAM and 500 GB hard disk size. > > > > > > Kindly clarify this , since we have around 6k+ users spreaded for 20 > > DCs. > > G'Day, > > There are a few things going on here: > - The CPU utilisation isn't normal, for any use case. If you were > loading your system up to the maximum number of objects, for example, it > would be slower, but as incoming authentication drop of, it would > decrease back to normal levels. To track down this, we need to work > out what routine it consuing the CPU time, say with the linux 'perf' > tools. At the very least, attach to the process spinning with 'gdb -p > ' and get me the output of 'bt full', in the hope that this > indicates the spinning routine. > > - Samba does have limits in terms of the number of users it can > currently efficiently serve, but that isn't at the 6000 user level, as > far as we are aware > > Also you need to set your expectations regarding when I might be able to > assist you: > - Please send all mail, unless confidential to the > samba@lists.samba.org mailing list. That way, others can help you. > You may send it to me if you like, but ensure you always also send it to > the list. This also means that others can learn from any answers I > give, rather than them staying private, and others can help you when I'm > not available. > - While I work on Samba, and I'm very grateful to my employers for the > time I'm able to spend on it, but you need to give us all a reasonable > time to reply, understanding that we may not work the same hours and > days that you do. For example, I'll be on leave most of this coming > week. > > Finally, a crash in Samba, and this is essentially what you describe, is > serious, and I certainly understand your worry. > > Andrew Bartlett > > -- > Andrew Bartlett > http://samba.org/~abartlet/ > Authentication Developer, Samba Team http://samba.org > Samba Developer, Catalyst IT http://catalyst.net.nz > > > -- Regards., Prema S CDAC Chennai -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/options/samba
[Samba] Restricting Sites and services in Samba4 DC
Hi all, I want to restrict the Samba4 DC to take the replication from only one server among 30 servers in my network. So i joined the samba server with --site option samba-tool domain join test.local DC -Usuperadmin --site=win-pdc --realm=test.local But after joining the Sites and services entry for Samba DC automatically generated all the 30 servers. Deleting all the entries and manually creating only one server is of no use. With in few minutes all the servers are getting generated again. How to solve this issue in samba4. -- Regards., Prema S CDAC Chennai -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/options/samba
[Samba] Problem in Windows Dc replication due to Samba4
Hi all, Ours is a setup of 30 Windows multi master DCs currently running with different servers (windows 2003 , Windows 2008 , Windows 2008 R2) . Till now it is running there is no issues with replication among the Winodws servers. Now recently i joined a Samba4 DC in the network as a replicating multi master DC. Everything goes fine for few hours but suddenly i got errors in Windows DC. The Windows 2008 R2 servers can replicate only among themselves and it cannot replicate to Windows 2003 and Windows 2008 servers and Samba server. The error code and solution is given as http://support.microsoft.com/kb/837932 But none of the solutions proposed in this page works. Has anybody comes across this issue before?I dont know whether this issue has arised really due to Samba4 Dc or how it would have arised. Infact i dont want a solution for Windows DC, but want to know whether Samba can be the root cause for this. Because till the moment i start the samba server , this error was not there. This has really became big headache and somebody kindly throw some lights on this issue. -- Regards., Prema S CDAC Chennai -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/options/samba
[Samba] Problem in Samba server Replication
Dear all, I have a setup of MultiDCs currently running in Windows 2008 R2 . Now I have successfully joined a Samba4 DC (gt version) with my Windows DC. Replication works perfectly from Windows Dc to Samba DC., but the other way is not working. When i add a user in samba dc it is not getting replicated to Windows DC. "samba-tool drs showrepl" shows "0 consecutive failures" and when i force for a replication from samba Dc to any of my Windows DC from "Sites and Services" the system just hangs. Also the NTDS replication settings lists all the 20 Windows DC. Even if i delete them and keep only 2 servers for replication, within few mins it refreshes and shows all the 20 servers again. How can i restrict the replication servers list in samba and how to achieve a two way replication in samba. More info available if needed. -- Regards., Prema S -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/options/samba
[Samba] Syncing Samba4 with AD DC
Hi all, I have a running Active directory DC in windows server 2008 having several child domains and I have both Linux and Windows clients joining to the domain. Now I am going to setup a Samba4 DC along with the parent Active directory DC . I want it to be a replicating server Dc from Windows. How can i do this effectively in samba4. -- Regards., Prema S -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/options/samba
[Samba] User policy in samba
Hi, Is it possible to set User specific password policies in Samba4. Say I wan to set the Password length of a particular user to be "7" where as my domain policy is "10" How to do this in samba4? -- Regards., Prema S -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/options/samba
[Samba] Samba4 - joining linux clients to Samba subdomain
Dear all , We have installed and setup Samba4 as Primary domain controller(pdc) in Debian based Linux OS. I am able to join a debian machine as a client using likewise-gui (PBIS) in the PDC. Realm: cdacsamba.lan Domain: cdacsamba Similarly I have another setup of Samba4 (Secondary domain controller - sdc1) currently running independently with debian machines as clients. Realm: sub1.cdacsamba.lan domain: sub1 Now i am trying to join the sdc1 as a subdomain of pdc. The requirement is , the policies what ever i put in pdc should get synced with sdc, but the local policies i put in sdc should not be sent back to pdc. I tried to do the above setup using "samba-tool domain join" as DC , but after joining I cant join and authenticate any clients to my sdc. I also tried joining another machine to join pdc without provisioning but that also in vain. Kindly guide me how to proceed and how i can join or create subdomains in samba4 and the method of authenticating clients in a subdomain. Thanks in advance. -- Regards., Prema S -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/options/samba
