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Re: Locking problems

To: Simon Matter <simon.matter@xxxxxxxxxxxxxxxx>
Subject: Re: Locking problems
From: Chris Tooley <ctooley@xxxxxxxx>
Date: 27 Aug 2002 08:53:17 -0500
Cc: linux-xfs@xxxxxxxxxxx
In-reply-to: <3D6B2C00.33549A97@xxxxxxxxxxxxxxxx>
References: <1030377163.28487.16.camel@xxxxxxxxxxxxxxx> <20020826190700.GB1894@xxxxxxxxxxxxxxxxxxxxxxxxxxx> <1030396680.32227.1.camel@xxxxxxxxxxxxxxx> <3D6B2C00.33549A97@xxxxxxxxxxxxxxxx>
Sender: linux-xfs-bounce@xxxxxxxxxxx
It's not a power cycle problem.  I never power cycle the server and as
it happens when the only method of launching the app is via a secure
shell to the server, the processes are there.  We don't have a problem
with having to power cycle the computers.

I doubt it is write caching, but where would I look to turn that off?

At this point I've had to move the data, format as ext2 and move the
data back.  It's not been tested yet, though I expect the same results
via ext2.

Chris Tooley

On Tue, 2002-08-27 at 02:36, Simon Matter wrote:
> 
> Chris Tooley schrieb:
> > 
> > No, they are SCSI disks in a software mirror.  I'm using the software
> > raid setup in the 2.4.19 kernel as it was as recent as possible.
> 
> It could still be a write caching problem, if they cycle power often.
> Today, most SCSI disks have write cache enabled by default and that can
> be quite dangerous with XFS in case of power failure.
> 
> Simon
> 
> > 
> > Chris Tooley
> > 
> > On Mon, 2002-08-26 at 14:07, Skylar Thompson wrote:
> > > On Mon, Aug 26, 2002 at 10:52:43AM -0500, Chris Tooley wrote:
> > > >
> > > > We're running a point of sale system on Linux and have put the data on
> > > > an XFS partition.  Unfortunately there has been consistent corruption of
> > > > the data during writes to the database.  Since the database is an ISAM
> > > > database, it's all stored in files that are opened and closed a lot.
> > > > The vendor of the point of sale is blaming XFS for the corruption.  The
> > > > application is an old COBOL app that is using the binary compatability
> > > > modules to run.  Are there any known problems with corruption when using
> > > > these binary compatability libraries with 1.1?
> > >
> > > Are you using IDE drives? I know there are problems with some IDE drives
> > > caching data incorrectly, which causes corruption in the event of a power
> > > failure.
> > >
> > > --
> > > -- Skylar Thompson (skylar@xxxxxxxxxxxxx)
> > >
> > > -- Attached file included as plaintext by Ecartis --
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> > >
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> > > =R66B
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> > >
> > >
> > >
> 
> 


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