Hello, I seem to be having this exact same issue with several applications that are loading images into a sequence. If I use share level security, force guest only or set a user as admin user, I get good speed at around 50MB/s. If set in any other way, samba doesn't negotiate anything higher than a 4K transfer and the app slows down to about 5MB/s. All clients are Windows 7. This is also a GPFS-based system. I have tried this on 3.5.11 and 3.5.15, both the same behaviour. Anybody have any idea what this could be or how I could improve on this? We can't really use the above workarounds because of our security policies. Many Thanks, Heather
On Tue, Mar 27, 2012 at 09:13:44AM +0200, Stijn De Smet wrote: > Hello, > > I have a performance problem when I don't connect using root and/or a user > in the "admin users". > Configuration: > Samba 3.5.11 running on SLES11SP1. The share exported is on a GPFS > filesystem and the GPFS vfs object is loaded(not loading it doesn't change > the described behaviour) > clients: Windows 7 and Windows 2008R2 all at latest update level. > > [testshare] > comment = testshare > path = /testfs1/testshare > read only = no > force create mode = 0666 > force directory mode = 0777 > force security mode = 0666 > force directory security mode = 0777 > admin users = testuser > > > If I connect using a user other than testuser, I get ~8 MB/s from the > clients, and if I look at a trace, I can see that all read operations are > in 4K blocks(Read AndX Request/Response). If I connect using root or > testuser(which is in the admin users), I get 50MB/s and samba goes up to > 60KB blocks when reading. Also during the negotiation, I can clearly see > that "Max Buffer: 0" is set in the "Session Setup AndX Request, > NTLMSSP_NEGOTIATE sent by the client, while this is 16644 when connecting > as root/testuser. > When switching to "security = share" and using guest access, I can see the > same behaviour. Setting force user/group to root gives good performance, > setting it to something else kills performance. > > Is this expected, or am I missing something? No it's not expected. Something else is going on here... > -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/options/samba
