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External Cache with networked computers

By fredihrer ·
We have found it necessary to disable external cache on all computer workstations
that access, and update shared data bases, to
insure reliable operation.
I have never seen this mentioned in the literature, and am wondering if we have missed somthing important somewhere all the way. We use a variety of peer to peer networks.

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External Cache with networked computers

by McKayTech In reply to External Cache with netwo ...

Is this with ALL architectures and motherboards or just with one particular series, make or model? And is it with all types of shared databases or just those based on a particular database?

It's not anything I've heard of and I have a fair amount of experience with shared databases (although admittedly limited in the number of peer-to-peer networks). But I'm willing to learn if you're willing to share the details.

But I'm having a hard time even imagining that external cache could causeproblems like lock failures in a shared database so I'm especially wondering what you're seeing and how you came to suspect the external cache.

regards!

paul

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External Cache with networked computers

by fredihrer In reply to External Cache with netwo ...

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External Cache with networked computers

by fredihrer In reply to External Cache with netwo ...

Point value changed by question poster.

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External Cache with networked computers

by Ann777 In reply to External Cache with netwo ...

You should be using all your cache. The reason you have never seen this mentioned, is because it does not make sense.

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External Cache with networked computers

by fredihrer In reply to External Cache with netwo ...

Anna's answer was insulting.
This is real problem.
We are using shared data bases in a transaction processing environment. It's important that two users do not update the data base simultaneously. Normally file locking prevents this, but with active external cache we have proven that the cache is not always flushed to the shared hard drive.
The solution (which works) is to disable the cache, but obviously, there should be a more elegant solution.

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External Cache with networked computers

by Ann777 In reply to External Cache with netwo ...

Sorry that my answer was taken as "insulting." It certainly was not intended to be.

What OS are u using? If it is not a true multi-tasking OS than that might explain your difficulties. The application and how it works, may also be a problem.Can you get any support from the manufacturers of the application?

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External Cache with networked computers

by fredihrer In reply to External Cache with netwo ...

The application runs under either DOS or windows(9.
Please note...we are not multitasking. We are using networked PCs as transaction processing work stations.
We are the manufacturer of the application. We demand 100% reliability. Disabling external cache on all workstations (not the file server) yields 100% reliability.
I appreciate your interest Anna777 but I think you're missing the point.

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