[gpfsug-discuss] SMB2 leases - oplocks - growing files

[Bart Van Damme]

We are a company located in Belgium that mainly implements spectrum scale
clusters in the Media and broadcasting industry.

Currently we have a customer who wants to export the scale file system over
samba 4.5 and 4.6.
In these versions the SMB2 leases are activated by default for enhancing
the oplocks system.

The problem is when this option is not disabled Adobe (and probably
Windows) is not notified the size of the file have changed, resulting that
reading growing file in Adobe is not working, the timeline is not updated.

Does anybody had this issues before and know how to solve it.



This is the smb.conf file:


============================

# Global options

smb2 leases = yes

client use spnego = yes

clustering = yes

unix extensions = no

mangled names = no

ea support = yes

store dos attributes = yes

map readonly = no

map archive = yes

map system = no

force unknown acl user = yes

obey pam restrictions = no

deadtime = 480

disable netbios = yes

server signing = disabled

server min protocol = SMB2

smb encrypt = off

# We do not allow guest usage.

guest ok = no

guest account = nobody

map to guest = bad user

# disable printing

load printers = no

printing = bsd

printcap name = /dev/null

disable spoolss = yes

# log settings

log file = /var/log/samba/log.%m

# max 500KB per log file, then rotate

max log size = 500

log level = 1 passdb:1 auth:1 winbind:1  idmap:1

#============ Share Definitions ============

[pfs]

comment = GPFS

path = /gpfs/pfs

valid users = @ug_numpr

writeable = yes

inherit permissions = yes

create mask = 664

force create mode = 664

nfs4:chown = yes

nfs4:acedup = merge

nfs4:mode = special

fileid:algorithm = fsname

vfs objects = shadow_copy2 gpfs fileid full_audit

full_audit:prefix = %u|%I|%m|%S

full_audit:success = rename unlink rmdir

full_audit:failure = none

full_audit:facility = local6

full_audit:priority = NOTICE

shadow:fixinodes = yes

gpfs:sharemodes = yes

gpfs:winattr = yes

gpfs:leases = no

locking = yes

posix locking = yes

oplocks = yes

kernel oplocks = no


Grtz,

Bart

*Bart Van Damme *

*Customer Project Manager*

*SDNsquare*
Technologiepark 3,
9052 Zwijnaarde, Belgium
www.sdnsquare.com

T:  + 32 9 241 56 01
<09%20241%2056%2001>
M: + 32 496 59 23 09



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