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[LDM #ONI-758666]: ldm test server



Erik,

> Is the MD5 checksum evaluated at the feed set level or the individual
> products within the feed set?

The LDM MD5 signature is computed for each data-product on an individual
basis. Thus, the MD5 signature is unique for each data-product.

> For example, if I have two servers requesting
> 
> REQUEST  IDS|DDPLUS  ".*"   host1.site1.edu (products ABC)
> REQUEST  IDS|DDPLUS  ".*"  host2.site2.edu  (products ABCD)
> 
> 
> But the IDS|DDPLUS is slightly different on host1, would the following
> happen:
> 
> My server intakes products from host1.
> 
> Server intakes examines MD5 checksum of products from host2, sees it is
> different, and accepts.
> 
> Thus the product queue contains ABCABCD.
> 
> During matching in pqact, the ABC files match the rules, and so the files
> from host1 become overwritten by those of host2.

The only way this kind of overwriting can occur is if the product-queue is
so small that the first data-product was removed to make room for more
data-products by the time that the second (duplicate) data-product arrives.

Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: ONI-758666
Department: Support LDM
Priority: Normal
Status: Closed
===================
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NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.