[Samba] Not enough storage space error

Anantha Raghava raghav at exzatechconsulting.com
Tue Aug 15 02:45:47 UTC 2017


Sincere apologies for delay in sending the details. After my return, I 
fell ill and just recovered.

Find the details below as you had sought.

Total No. of OU : 905

Objects under OU : On an average 10. Each OU contains mainly users.

Total Number of Domain Computers : Now it is 1300, eventually it will 
grow to 8500

Total Number of Objects in DB 9005 (As reported by samba-tool dbcheck 
--cross-ncs, reports "0" errors)

DB Size : 146 MB at present (That is "DC=ktkbankltd, DC=com.ldb" in 
"/usr/local/samba/private/sam.ldb.d/" folder.)

Total Number of Domain Controller : 2 at Present, we will add two more 

Hardware configuration (Server with all FSMO Role) : Lenovo Flex System 
x240 M5 node with Intel E5-2600 v4 CPU (16 Core), 64 GB Memory and 300 
GB HDD, 10Gbps NIC.

Virtual Machine on KVM for Additional Domain Controller : 2 (Virtual 
Socket) x 8 Core per Virtual Socket, that is 16 vCore CPU, 32 GB Memory, 
100 GB HDD, 1 Gbps Virtual NIC.

OS on which Samba is installed : CentOS 7.3 (build 1611), firewall and 
SELinux disabled for the moment.

DNS : BIND 9 (9.9.4 to be precise)

We were moving many users from one OU to another when RSAT kicked us 
out. At the same time, in some other location, PCs were getting added to 
Domain as members. We kept observing the memory consumption using an 
NMS, both memory & CPU utilization never shot up abnormally even when 
domain controller kicked us out. Average CPU Utilization is about 3% and 
average memory utilization is about 4% of total memory of 64GB. 
Initially, as mentioned earlier, we thought this error is happening 
because of RSAT on Windows 7 Professional 64 Bit.  However, the error 
surfaced even when RSAT is being used on Windows Server 2008 R2.

smb.conf is attached to this mail.

Sample PC (Workstation), server names, OS versions :

AD-RSAT - Virtual Machine with Windows Server 2008 R2, mainly used for 
RSAT and remote support.

BLR064RAJA06 - Windows 7 Professional 32 Bit with SP1

BLR114PADM01 - Windows 7 Professional 64 Bit with SP1

BLR902BSK307 - Windows XP Professinal SP3 32 bit

MLR495PMRR17 - Windows XP Professional SP3 32bit

KAMAT-PC - Windows 7 Professional 32 Bit with SP1

BLR907KHRO08 - Windows 10 Enterprise LTSB

Also we have a Proxy Server (WebSense) and different applications 
authenticating against this AD Setup.


We did have a detailed discussion to move from version 4.6.5 to 4.7. 
However it was decided that we wait till 5th September, the day on which 
the stable version of 4.7 is scheduled to be released. We did setup 
4.7rc, but simulating a large network is a challenge. Hence forced to 
drop the idea.


Thanks & Regards,

Anantha Raghava

Do not print this e-mail unless required. Save Paper & trees.

On 10/08/17 3:22 PM, Andrew Bartlett wrote:
> On Tue, 2017-08-08 at 08:30 +0530, Anantha Raghava wrote:
>> Hello Andrew & Louis,
>> Yesterday by around 1:30 PM we had the same issue. Samba AD kicked
>> all of us out and RSAT did not connect to any domain controllers.
>> Incidentally the RSAT that caused this error was running on Windows 7
>> Professional 64 Bit edition.
> What as the action being done in RSAT?  If it was a OU rename/move, how
> many objects were under the OU?
> Thanks,
> Andrew Bartlett

-------------- next part --------------
# Global parameters
	netbios name = PDC
	server services = s3fs, roc, nbt, repel, ldap, clad, ldc, deeply, winbindd, ntp_signed, lcc, dnsupdate
	workgroup = KTKBANKLTD
	server role = active directory domain controller
	idmap_ldb:use rfc2307 = yes
	log leve = 3
	log file = /var/log/samba/samba.log.%T
	max log size = 102400

	path = /usr/local/samba/var/locks/sysvol/ktkbankltd.com/scripts
	read only = NO

	path = /usr/local/samba/var/locks/sysvol
	read only = NO

	comment = for all users, store common files like desktop wall paper
	path = /home/shares
	read only = YES

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