Just to add a little info, we found that Windows XP has some sort of internal read buffer of around 67,076,095 bytes. There's a couple of references to a number like that on the internet.
However, a windows 2008 server share seems to ignore, or account for that buffer and handles the reads properly, but a Samba share does not. Does anyone have any thoughts or ideas on a setting that might help? > From: [email protected] > To: [email protected] > Date: Wed, 7 Apr 2010 09:41:41 -0400 > Subject: [Samba] samba server file read size limit of 64MB for HDF files > > > Sorry if that's a vague subject, but this problem is a little weird and I'm > just wondering if there are any suggestions out there. > > We've got a Samba server (3.0.23) running on a CentOS 5.3 server offering up > a data share of 7TB on an XFS filesystem. The authentication all happens > through a Samba PDC with an LDAP backend all on a different server. The > system in question is just a domain member fileserver. > > On the data share are several HDF files that we try to read into a couple of > different applications on XP. I'm using the Compaq Array Visualizer just to > look at them. The files on the server are owned by root, and world > read/writable. As a regular user on the XP client, if I look at one of the > files that's ~30MB in size, I'm presented with all the numbers I expect to > see. If I look at a file that's larger than 64MB (80MB for the specific ones > I was testing, but we've found the problem after 64MB in size) I no longer > see the numbers that I would expect...it's all zeroed out at the beginning. > > If I copy the 80MB HDF to my local XP workstation, it works fine, so it's not > a corrupted file or anything. > > The weird part is that if I go onto the linux server and change the ownership > of the file to my regular user account, it all works fine...I can read the > 80MB file through samba and see all the numbers I should...but no other users > can. If I change the ownership to someone else, they can then see it all, and > I can't again. > > At one point all of these files were hosted from a Windows 2008 Server, and > never experienced these problems, only after the move to the Samba server. > > The fact that anything smaller than 64MB works, starts to sound like a > possible setting that I can change. > > Unfortunately I can't provide the HDF files I'm using, and if you want to see > the smb.conf let me know and I can try to get that posted. > > If anyone has any insight or help to offer, it would be appreciated. > > Thanks. > > Kevin Taylor > > _________________________________________________________________ > Hotmail is redefining busy with tools for the New Busy. Get more from your > inbox. > http://www.windowslive.com/campaign/thenewbusy?ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_2 > -- > To unsubscribe from this list go to the following URL and read the > instructions: https://lists.samba.org/mailman/options/samba _________________________________________________________________ Hotmail has tools for the New Busy. Search, chat and e-mail from your inbox. http://www.windowslive.com/campaign/thenewbusy?ocid=PID28326::T:WLMTAGL:ON:WL:en-US:WM_HMP:042010_1 -- To unsubscribe from this list go to the following URL and read the instructions: https://lists.samba.org/mailman/options/samba
