1. David Boyce David Darby
Boston Metro ClearCase Users Group March 27, ClearCase UNIX/NT Interoperability Using Samba
David Boyce
David Darby

2. SMB What does SMB stand for? What does NFS stand for?
Server Message Block
Used to be called Lanman
Many old protocols for WfWg/win95/98/NT
Also used for print sharing
What does NFS stand for?
Network File System
February 19
BMCCUG

3. NFS vs. SMB Per-client setup unnecessary Microsoft’s SMB bias
SMB not better per se
Beneficial side effects
February 19
BMCCUG

4. Other SMB Solutions Total Access Server Sun’s PC-Netlink / EAS
Network Appliance
Auspex
Dave (Mac)
EMC
February 19
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5. Our Experiences Fidelity – DiskAccess, Samba 2.0.3 – 2.0.7
Progress – Samba 2.0.7, NetApp
Home Lab - Samba 2.2 PDC
No discussion of printing
February 19
BMCCUG

6. Samba Intro Read Rational’s TAS documentation
Version History and Capabilities
< 2.00 ( Stable 1.X version)
2.0.3 (works)
2.0.4 (requires bugfix)
2.0.5 (nktnw)
2.0.7 Works with ClearCase 4.1
2.2 Alpha still
smbd & nmbd daemons
Oplocks always bad for interop
PDC Support
Build issues for multiple servers
February 19
BMCCUG

7. Samba Risks Unsupported today – supported soon?
What’s the worst-case scenario? Occasional file corruptions.
Can co-exist with NFS.
February 19
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8. Downloading & Building Samba
Official Samba Site:
Current released version (samba-latest.tar.gz)
Use Standard GNU Compiler
Build (./configure –prefix=/opt/samba)
Don’t build in /tmp (checks file locking)
February 19
BMCCUG

9. Samba Config Files /opt/samba/lib/smb.conf smbpassword map
Global and per-share configuration
Most keywords work in both places
Use the testparm command
White space is ignored on left of =
smbpassword map
domain group map
username map
February 19
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10. Sample smb.conf (global)
# Global parameters
server string = Samba ClearCase VOB Server
workgroup = <MY_DOMAIN>
security = DOMAIN
encrypt passwords = Yes
password server = <PDC> <BDC1> <BDC2>
client code page = 437
max open files = 1014
max log size = 2000
wins server =
allow hosts = /
guest account = pcguest
dont descend = /view
hosts deny = <troublesome machine>
February 19
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11. Sample smb.conf (per share)
# Per Share parameters
[vbstore]
comment = ClearCase VOB Storage
path = /data/ccase/vbstore
admin users = vobadm clearcase_albd
read list
write list
read only = No
[vwstore]
comment = ClearCase View Storage
path = /data/ccase/vwstore/NT
February 19
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12. PDC Group File Changes
[changed 1] | [changed to 1]
root::0:root | root::0:root,vobadm,dsb
-|-
[changed 5] | [changed to 5]
adm::4:root,adm,daemon | adm::4:root,adm,daemon,vobadm,dsb
[changed 13] | [changed to 13-15]
-| ccusers::29000:vobadm,dsb,tom,sally
| clearcase::30001:clearcase_albd |-
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13. User Map
!vobadm=clearcase_albd
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14. Group Map root=Administrators "Domain Admins”="Domain Admins”
staff=“Domain Users”
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15. System Configuration #1
/etc/services
# Samba Stuff
swat /tcp # Samba Windowed Admin Tool
/etc/inetd.conf
swat stream tcp nowait.400 root /usr/local/samba/bin/swat swat
February 19
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16. System Configuration #2
/etc/rc2.d/S78samba
#! /sbin/sh
# Startup script for Solaris 7+/Samba 2+
# David Boyce 8/9/99
case "$1" in
start) /usr/local/samba/bin/smbd -D
/usr/local/samba/bin/nmbd -D ;;
stop) /usr/bin/pkill '[sn]mbd' ;;
restart|reset)
/usr/bin/pkill '[sn]mbd'
/usr/local/samba/bin/smbd -D
/usr/local/samba/bin/nmbd -D
/usr/bin/pgrep -l '[sn]mbd' ;;
*) echo "Usage: $0 { start | stop | restart }" ; exit 1 ;;
esac
February 19
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17. Samba Web Administration Tool
Best interface to documentation.
Best interface to current activity.
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18. Clearcase Interoperability
Use shares liberally
Network Perl
Triggers
View Profiles (requires a subdir)
Config Specs
Install areas
Vob storage areas
February 19
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19. Extra Benefits Homes share (H:\)
comment = Home directory
read only = No
browseable = No
Client side - smbsh, smbclient, smbtar
Registry changes - rpcclient
Good way to practice for TAS
February 19
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20. Resources http://www.samba.org Many mailing lists there
News: comp.protocols.smb
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21. SFIO
Fd900 text program
Mnodes and setrlimit()
February 19
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22. Tips Use “hosts allow” and “hosts deny” for rollout (and security).
Use “kill -USR1 <pid>” to raise debug level and “kill -USR2” to lower it.
Samples - ftp://ftp.cleartool.com/pub/Samba
February 19
BMCCUG