hello everyone I am running suse9.0 with samba 2.2.8 kernel 2.4.23, the app is in vb6 using the vb jetengine to access access97 databases, roughly 15 of them all between 200 - 900 megs in size, all on the same shared drive. This arrangement works well on our NT4 server. but when we try to use linux/samba we find read/writing is incrediably slow. as an example our standard test on NT4 takes 4 -5 seconds to run. Now, with 6 workstations connected under samba this test also takes 4 - 5 seconds, BUT as soon as the entire lab is connected which is roughly 30 - 40 pc's, that time jumps to 20 - 30 seconds. Now here is what we have tried: standard samba install, oplocks are at defaults. very very slow performance. we have also tried vetto oplocks, seemed to have no affect. after much fiddling with socket options, log levels and much reading on how oplocks work we discovered if "fake oplocks = yes" was set our performance issues vanished. however, we then found we had troubles with deleteing a record in a database which was open. in our environment databases are constantly open so this is a big problem. our last attempt ( this morning ) was using locking = yes, which with 6 workstations connected appeared to be perfect. but alas it was also slow. here is our current configuration file. [global] workgroup = laboratory socket options = SO_KEEPALIVE TCP_NODELAY SO_SNDBUF=8192 SO_RCVBUF=8192 IPTOS_LOWDELAY lock spin time = 15 lock spin count = 100 log level = 1 max log size = 50 level2 oplocks = no oplocks = no locking = yes getwd cache = yes os level = 2 time server = Yes unix extensions = Yes encrypt passwords = yes map to guest = Bad User printing = CUPS printcap name = CUPS wins support = yes ; wins server = 192.168.1.100 server string = Pathware add user script domain master = false domain logons = no local master = no preferred master = auto ;; ldap server = 127.0.0.1 this is also how our shares are setup [share_d] comment = PathWare Data path = /raid/share_d force directory mode = 0777 force create mode = 0777 browseable = yes read only = no guest ok = no printable = no please fire away with questions and suggestions, if i havent made something clear i apologise. I'm all ears.
I also forgot to mention that dhcpd is also running on this machine. that is the only other extra service. so anyone had any experiences like this before? i have read whats in the archives and they all point to not using oplocks, which i have tried and gotten no where, except with fake oplocks.
Andrew Bartlett
2004-Jan-28 07:58 UTC
[Samba] Access97, in house VB6 app, terrible performance
On Wed, 2004-01-28 at 10:49, Tim Smith wrote:> hello everyone I am running suse9.0 with samba 2.2.8 kernel 2.4.23, the > app is in vb6 using the vb jetengine to access access97 databases, > roughly 15 of them all between 200 - 900 megs in size, all on the same > shared drive. > This arrangement works well on our NT4 server. but when we try to use > linux/samba we find read/writing is incrediably slow. as an example our > standard test on NT4 takes 4 -5 seconds to run. Now, with 6 workstations > connected under samba this test also takes 4 - 5 seconds, BUT as soon as > the entire lab is connected which is roughly 30 - 40 pc's, that time > jumps to 20 - 30 seconds. > Now here is what we have tried: > standard samba install, oplocks are at defaults. very very slow performance. > we have also tried vetto oplocks, seemed to have no affect. > after much fiddling with socket options, log levels and much reading on > how oplocks work we discovered if "fake oplocks = yes" was set our > performance issues vanished.And so did all your database integrity! What syntax were you using for 'veto oplock files'? You could just turn off oplocks completely 'oplocks = no'. Andrew Bartlett -- Andrew Bartlett abartlet@pcug.org.au Manager, Authentication Subsystems, Samba Team abartlet@samba.org Student Network Administrator, Hawker College abartlet@hawkerc.net http://samba.org http://build.samba.org http://hawkerc.net -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: application/pgp-signature Size: 189 bytes Desc: This is a digitally signed message part Url : http://lists.samba.org/archive/samba/attachments/20040128/af2360d1/attachment.bin