On 16/12/13 11:30, Chair wrote:
Allo
Just jumping in here a minute:
It is unworthy of an IBM employee to spread such inaccurate
misinformation.
Whilst this may be inaccurate - I very, very, much doubt that IBM or
their employees have a secret master plan to spread misinformation (!)
In the spirit of this group, let's work together to technically look at
such issues.
Sven, if that is the case, perhaps you could crib the lines of code /
show your methodology that supports your views / experience.
Presumably this all comes down to the locking setup? Relevant to this,
I've got:
(from samba settings:)
vfs objects = shadow_copy2, fileid, gpfs, syncops
clustering = yes
gpfs:sharemodes = yes
syncops:onmeta = no
blocking locks = Yes
fake oplocks = No
kernel oplocks = Yes
locking = Yes
oplocks = Yes
level2 oplocks = Yes
oplock contention limit = 2
posix locking = Yes
strict locking = Auto
(gpfs settings:)
syncSambaMetadataOps yes
Regards,
Jez
--
UG Chair
On 16/12/13 11:21, Jonathan Buzzard wrote:
On Fri, 2013-12-13 at 10:14 -0800, Sven Oehme wrote:
[SNIP]
the only way to get something working (don't get confused with
officially Supported) is to recompile the CTDB src packages AND the
Samba src packages on a node that has GPFS already installed. also the
inclusion of CTDB into Samba will not address this, its just a more
convenient packaging.
Only if the build happens on such a node things like the vfs modules
for GPFS are build and included in the package.
That is a factually inaccurate statement. There is nothing in CTDB that
is GPFS specific. Trust me I have examined the code closely to determine
if this is the case. So unless this has changed recently you are flat
out wrong.
Consequently there is no requirement whatsoever to rebuild CTDB to get
the vfs_gpfs module. In addition there is also no requirement to
actually have GPFS installed to build the vfs_gpfs module either. What
you need to have is the GPFS GPL header files and nothing else. As it is
a loadable VFS module linking takes place at load time not compile time.
It is unworthy of an IBM employee to spread such inaccurate
misinformation.
[SNIP]
said all this the binaries alone are only part of the Solution, after
you have the correct packages, you need to properly configuration the
system and setting all the right options (on GPFS as well as on CTDB
and smbd.conf), which unfortunate are very System configuration
specific, as otherwise you still can end up with data corruption if
not set right.
Indeed. However I know not only what those options are, but also what
they do despite IBM's refusal to tell us anything about them.
I would also point out that there are sites that where running Samba on
top of GPFS for many years before IBM began offering their
SONAS/Storwize Unifed products.
JAB.
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--
--
Dr Orlando Richards
Information Services
IT Infrastructure Division
Unix Section
Tel: 0131 650 4994
skype: orlando.richards
The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.
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