Question

Samba/Windows locking problem

Asked by: pbervoets

I have an Oracle server whose datafiles I would like to copy daily.
So once a day I put the database in backup-mode and the files are unlocked and I can copy them at Linux level.
But I would like them to be copied by a XP workstation that can access the files through Samba. But that XP keeps saying the files are locked and can't be read.

I found a lot about the file-locking possibilities in Samba, but am a bit shy of trying them out on my production machine. (And I need those backups to get my test environment ready).

So if anyone could tell me which locking parameter I need to give with my share, I would be very thankful. (share modes = DENY_WRITE or locking = no or oplocks=no or ...)

Patrick

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Asked On
2009-08-31 at 06:28:17ID24694650
Tags

Samba file-locking XP Linux

Topics

Samba File Sharing

,

Microsoft Windows Operating Systems

,

Linux

,

Oracle Database

Participating Experts
3
Points
500
Comments
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Answers

 

by: bittiPosted on 2009-09-01 at 07:38:56ID: 25232046

Hi,

On samba conf file, try this ?

kernel oplocks = no

Regards

 

by: mrjoltcolaPosted on 2009-09-01 at 09:02:03ID: 25232948

This is not a recommended way to do database backups (sharing the ora datafiles out to a windows machine). Its always better to have your backup script drive the backup and copy the files where they need to go.

I recommend you either:
1) use a script on the Linux box to copy the files over to a temporary directory that is shared, then have the XP machine copy the temporary ones, not the original ones.
2) Use cifs to mount a Windows share onto the Linux box and have the Linux script copy them directly to the windows share

I also recommend using RMAN since it is faster, will create smaller backupsets, and does not require putting the tablespaces into hot backup mode. You can tell RMAN what directory destination to use.

 

by: rolutolaPosted on 2009-09-01 at 09:48:40ID: 25233437

Rather than make any changes to file locking, why not use tried and tested ftp?

Just a suggestion.

R.

 

by: pbervoetsPosted on 2009-09-01 at 13:24:50ID: 25235616

Actually the people who write our database-applications are used to work on Windows (I am their only client using Linux).
So they wrote a VBS that controls the backups & they want to control every step in the chain, I can't suggest a Linux-side script.

So I'll try the kernel oplocks = no.
I'll post how it turned out.

Thanks all of you, I appreciate your suggestions.

Patrick

BTW the database is in archive log and I do exports and my (would-be) standby system is also a Linux - so this is not our sole strategy.

 

by: pbervoetsPosted on 2009-09-03 at 00:10:34ID: 25248396

Sorry for the delay, but 'kernel oplocks = no' doesn't help. The XP (even after a reboot) still thinks the file is locked.

Anyone knows how I can let the client (through Samba) know that a previously locked file is unlocked?

Thanks.

 

by: mrjoltcolaPosted on 2009-09-03 at 13:14:06ID: 25254474

>>Actually the people who write our database-applications are used to work on Windows (I am their only client using Linux).

If this is the case, it does not sound like they are a reputable Oracle firm who should be controlling or dictating your Oracle backups.

>>So they wrote a VBS that controls the backups & they want to control every step in the chain, I can't suggest a Linux-side script.

That is bad. VBS is not the "approved" backup scripting language for Oracle across platforms. A simple RMAN or user managed scheduled backup to a secondary storage (that could be mapped or copied over to Windows after the fact) is the simplest solution I see.

Sorry, I'll leave it at that, but I have no other suggestions.

 

by: pbervoetsPosted on 2009-09-15 at 22:37:25ID: 25342196

OK, no luck in playing with the locks, we are turning to pl-sql to copy the files.
Thanks anyway

 

by: pbervoetsPosted on 2009-09-15 at 22:40:07ID: 31622509

Good solutions but given the fact that we are tied to a Windows-solution unusable.

20120131-EE-VQP-002

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