[Samba] extremely low performance on Samba 4.2.14-Debian
jra at samba.org
Tue Aug 29 15:59:58 UTC 2017
On Tue, Aug 29, 2017 at 01:47:27PM +0200, Emmanuel Florac via samba wrote:
> Le Mon, 28 Aug 2017 16:45:16 +0200
> Reindl Harald via samba <samba at lists.samba.org> écrivait:
> > Am 28.08.2017 um 16:29 schrieb Rowland Penny via samba:
> > > These are your non-default lines:
> > >
> > > server signing = mandatory
> > and i bet that one has the major performance impact
> > __________________________
> > quote from microsoft:
> > Using SMB packet signing can degrade performance up to 15 percent on
> > file service transactions.
> > Depending on your network and your storage system implementation, the
> > performance impact might be quite different. You may have to test in
> > you own environment to get an accurate statistics.
> Interesting. It's quite possible for the Samba implementation to be much
> slower than Microsoft's. However of course if this turns on encryption
> it can understandably hamper performance dramatically on fast networks.
The Microsoft implementation certainly will use the Intel AES-specific
instruction set, which Samba doesn't out of the box. There is a NetGear
patch that fixes this for Samba by copying the libraries from the Linux
kernel implementation, but this hasn't been merged yet.
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