[Samba] FW: suggestions for a "fast" fileserver - 1G / 10G - focus on smb.conf/samba

[Oscar Aparicio Holgado]

First sorry to invade this thread, but i'm interested to try this advices in my virtual machines about compile 3.13.7 kernel.
I'm using Debian Wheezy, i have a doubt.
What GCC version i must use to compile kernel?, and most important, must be enabled this options in config file : ?
*.- XEON instruction optimizations*.- block device caching
Thanks.
Oscar.

> Date: Tue, 25 Mar 2014 11:50:04 -0400
> From: gcarter at aesgi.com
> To: samba at lists.samba.org; eflorac at intellique.com
> Subject: Re: [Samba] suggestions for a "fast" fileserver - 1G / 10G - focus on smb.conf/samba
> 
> My suggestion would be to take a look at the latest kernels.
> 
> Don't forget, just recently added to the LINUX kernel has been better threaded
> I/O, and the ability to treat block devices as assisted cache facilities.
> 
> First thing I would do is download 3.13.7 (Just released).
> 
> Secondly, don't use the binary RPM's with the distro.  They are generic
> architecturally speaking.
> 
> Use the latest GCC stack, and use XEON instruction optimizations to compile and
> build the binary and kernel.
> 
> Secondly, I would implement block device caching.
> 
> For directed I/O and Network I/O I got a good 20% performance boost all around
> just doing nothing with my existing Samba config and implementing the above.
> 
> That was significant and you will notice bigger gains the more people you have
> accessing your Samba server (i.e. In this case a server that has about 300 users
> at any given time.).
> 
> Also, make sure you have a good spread on your APIC.
> 
> If you see all of your interrupts going through processor 0, your operating
> system kernel is not using the hardware efficiently.
> 
> Make sure your APIC is working, and you got good interrupt load spread across
> the PCIXpress backplane/bus between your Network card, Memory, and SATA/SCSI
> controllers.
> 
> Building a professional SAMBA system goes way beyond the smb.conf file,
> unfortunately.
> 
> But hopefully these are some tips to help you get started.
> 
> -gc
> 
> 
> On March 25, 2014 at 10:17 AM Emmanuel Florac <eflorac at intellique.com> wrote:
> > Le Tue, 25 Mar 2014 08:14:06 +0100 vous écriviez:
> >
> > > Hi,
> > >
> > > thanks for all the feedback and topics.
> > >
> > > May be I can/should draw a better picture of my settings and question.
> > >
> > > We "still" use samba 3.6.9-167 from Red Hat with an openldap backend.
> >
> > That shouldn't be a problem, really.
> >
> > > I tried from an older posting somewhere:
> > >
> > > socket options = TCP_NODELAY IPTOS_LOWDELAY SO_RCVBUF=65536
> > > SO_SNDBUF=65536
> >
> > Normally these are not necessary. In particular I'm pretty sure
> > enforcing buffer size can do more harm than good.
> >
> > > We have some reliable, fast hardware SATA ISCSI raid boxes with min.
> > > 12 disks, most are 16 disks, configured in raid 10, 5, 6 depending
> > > on the use case and date stored. (e.g. lots of smaller r/w, some are
> > > big files min. some Gig.)
> > ><...>
> > >
> > > So what can speed up smb?
> >
> > What is the disk subsystem performance like from the samba
> > server point of view? Do you use the nobarrier/barrier=0 option on the
> > shared filesystem?
> >
> > --
> > ------------------------------------------------------------------------
> > Emmanuel Florac | Direction technique
> > | Intellique
> > | <eflorac at intellique.com>
> > | +33 1 78 94 84 02
> > ------------------------------------------------------------------------
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