| 1 |
Intro: |
| 2 |
There is an ancient Clipper CA 5.4 application that run from ages on a |
| 3 |
samba share. |
| 4 |
The app has concurrent access to *.DBF *.DBT *.NTX files. |
| 5 |
Now we are (trying to) migrating -some- clients and running the app on a |
| 6 |
"dosemu" + "Dos 5.0" environment. |
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Concurrent access to the same data is required from both linux and win2k. |
| 8 |
On linux box the share is mounted with smbmount. |
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|
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The problem: |
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Lock issued from linux are invisible to win2k and vice versa. |
| 12 |
When some record are opened from one client it should be impossible for |
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another to open it too. This has always worked untill now, but the |
| 14 |
locking is not working now if the same record is opened at the same time |
| 15 |
from both win2k and linux+dosemu+dos5.0 . |
| 16 |
It continue to work in multiclient linux only environment. |
| 17 |
It continue to work in multiclient w2k only environment. |
| 18 |
The result is a very fast corruption of index (NTX) files and possibly |
| 19 |
the data files too (DBF, DBT) . |
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|
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The supplica: |
| 22 |
Please help a poor overcharged admin to switch at least some clients to |
| 23 |
a nice S.O. |
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|
| 25 |
Readings: |
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http://us1.samba.org/samba/docs/man/Samba-HOWTO-Collection/locking.html |
| 27 |
http://us1.samba.org/samba/docs/man/Samba-HOWTO-Collection/smb.conf.5.html |
| 28 |
http://listas.cipsga.org.br/pipermail/linux-pira/2004-August/001641.html |
| 29 |
http://www.drouillard.ca/Tips&Tricks/Samba/Oplocks.htm |
| 30 |
|
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Further data: |
| 32 |
Samba has been emerged with "-*" USE flags |
| 33 |
=========== smb.conf =========== |
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[global] |
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security = SHARE |
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passdb backend = guest |
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guest account = root |
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unix password sync = Yes |
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max xmit = 65535 |
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unix extensions = No |
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paranoid server security = No |
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socket options = IPTOS_LOWDELAY TCP_NODELAY SO_SNDBUF=8192 |
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preferred master = No |
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local master = No |
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domain master = No |
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ldap ssl = no |
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hide dot files = No |
| 48 |
strict locking = Yes |
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level2 oplocks = No |
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dos filemode = Yes |
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oplocks = No |
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veto oplock files = /*.NTX /*.DBF /*.DBT |
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blocking locks = no |
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fake oplocks = no |
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lock spin count = 100 |
| 56 |
lock spin time = 18 |
| 57 |
|
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[one] |
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comment = this is one |
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path = /mnt/one |
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read only = No |
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guest ok = Yes |
| 63 |
=========== smb.conf =========== |
| 64 |
|
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====== server /etc/fstab ======= |
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/dev/sda6 /mnt/app xfs user 0 0 |
| 67 |
====== server /etc/fstab ======= |
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|
| 69 |
====== server kernel cfg ======= |
| 70 |
|
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2.6.6-rc3-mm2 |
| 72 |
|
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CONFIG_XFS_FS=y |
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# CONFIG_XFS_RT is not set |
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# CONFIG_XFS_QUOTA is not set |
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# CONFIG_XFS_SECURITY is not set |
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# CONFIG_XFS_POSIX_ACL is not set |
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CONFIG_SMB_FS=y |
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# CONFIG_SMB_NLS_DEFAULT is not set |
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CONFIG_CIFS=y |
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====== server kernel cfg ======= |
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|
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====== client /etc/fstab ======= |
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//server.local/app /mnt/gbr smbfs |
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guest,uid=1000,gid=100,ip=server.local,iocharset=utf8,codepage=cp850,ttl=10000 |
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0 0 |
| 87 |
====== client /etc/fstab ======= |
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|
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-- |
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