On Wed, May 14, 2008 at 03:30:54PM -0700, Jack Lauman wrote: > I'm trying to get Lacerte 2007 Tax Accounting software working on a > Samba v3.0.28a based server. When one user is logged in it works fine. > When two or more users are accessing the database files it slows to a > crawl.
But it still does work? > I compared the open files with one computer in Lacerte vs. two > computers in Lacerte and noticed one thing peculiar: when one computer > is using Lacerte, all files are opened with exclusive+batch oplocks > including Data1i07.dbf, however when 2 computers are running Lacerte, a > few files open without oplocks, notably data1i07.dbf. I have also That's expected. Oplocks with r/w are only possible for exclusive access. I've had a customer experiencing exactly the same issue that you have. Different application, but it was used against Samba in production and it was terribly slow. They tested it against Windows -- it was fast. It turned out that against Samba they had several concurrent users and the test against Windows only had one user. Just the simple operation of copying the file away from the Windows server while the test on Windows was running made the app show exactly the same behaviour against Windows as it formerly had against Samba: It was almost unusably slow because its oplock had been broken. I'm not saying that Samba is bug-free here, but what you are describing really smells like a horrendously badly written Windows application that has never been really tested with multi-user access. Volker
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