[Samba] samba & Oracle ACFS Issues

[Nacho del Rey]

Hi there

In an Oracle RAC cluster using ACFS (as file-system) where we have a samba
server for sharing files to windows clients, we are suffering a strange
issue, from time to time, which it causes the Windows clients lock for a
while (10 min or a bit more) or even indefinitely when they are working
with the share resource, and sometimes we have to re-start the samba
service to come back to normality

We thought the problem was on the ACFS locks (incompatibility with samba
locks), so we tried to avoid them using some parameters in smb.conf but
unfortunately we are still having problems

Data:

OS: RHEL 6.4
samba server: samba-3.6.9-151.el6_4.1.x86_64
Oracle: 11.2
Windows 2008 & Windows 7

smb.conf

[global]
        log file = /var/log/samba/log.%m
        socket options = TCP_NODELAY SO_RCVBUF=8192 SO_SNDBUF=8192
        encrypt passwords = true
        wins support = true
        nt acl support = Yes
        logon script = %U.bat
        local master = yes
        workgroup = SMBBD
        name resolve order = bcast host
        server string = Servidor Samba NOCON
        security = share
        map to guest = Bad User
        preferred master = yes
        bind interfaces only = True
        max log size = 50
        domain logons = Yes
        smb ports=139
        log level = 2 locking:5


[dossiers]
        comment = xxxxxxxxxxxxxxxxxxxxxx
        path = /opt/srv007/app
        guest ok = yes
        writable = yes
        browseable = no
        create mask = 0664
        directory mask = 0775
        force create mode = 0664
        force directory mode = 0775
        force user = expl
        force group = expl
        # The following to avoid file system lockings
        locking = Yes
        strictlocking = No
        posixlocking = Yes
        oplocks = No
        level2oplocks = No
        fakeoplocks = No
        blockinglocks = Yes

$  df /opt/srv007/app/
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/asm/vpdona07-390
                      68157440  13112864  55044576  20% /opt/srv007/app

/dev/asm/vpdona07-390 /opt/srv007/app acfs rw,relatime,device,rootsuid 0 0

Has anybody got a clue?

Thanks in advance

Nacho.