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[LDM #HEQ-649192]: LDM fault tolerance

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  • Subject: [LDM #HEQ-649192]: LDM fault tolerance
  • Date: Tue, 21 Apr 2015 13:57:36 -0600
Geoffry,

Information on the last, successfully-received data-product is stored on disk 
by a downstream LDM. It is only "shared", however with the corresponding 
downstream LDM of a subsequent LDM session (e.g., when the LDM is restarted).

The white-paper on our LDM cluster describes multiple LDM "backend" hosts each 
receiving the same data streams. In such a situation, it's not necessary to 
share information on the last, successfully-received product.

> > from the last successfully-received product (which it tracks)
> 
> Where is that tracked? On disk? In memory? This seems like something that
> would be lost if the whole node was lost unless it was also tracked
> redundantly by the upstream node. Or it was configured to be stored on a
> durable and redundant drive. It sounds like I should explore keeping this
> information on a durable redundant store on the downstream-side so it can
> be shared by a node before it is completely terminated and a fresh
> replacement.
> 
> Thanks!

Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: HEQ-649192
Department: Support LDM
Priority: Normal
Status: Closed