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[LDM #BMA-267922]: Limitation of size of product in LDM version 6.10.1?

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  • Subject: [LDM #BMA-267922]: Limitation of size of product in LDM version 6.10.1?
  • Date: Tue, 28 Feb 2012 15:07:37 -0700
Charlie,

> Thanks for your recommadation.
> 
> Our users (LDM version 6.9.8) reported that while they tried to send
> zero-sized data-products, an error message was showed:
> 
> ldmsend ERROR: Couldn't memory-map file [ldmsend.c:179]
> ldmsend ERROR: Couldn't send file "xxx" to LDM [ldmsend.c: 311]
> 
> Does this result from MD5 checksum?

Upon further investigation, it looks like I made a mistake in my previous 
answer. Sorry about that.

The correct answer is that zero-size data-products are not supported by every 
aspect of the LDM system on all platforms. In particular, the ldmsend(1) 
utility cannot handle zero-size files because it uses the mmap(2) system 
function and that function fails for zero-length regions.

For this reason and the reasons I mentioned in my previous reply, I recommend 
that you avoid zero-length data-products.

> Best Regards,
> Charlie Chang

Regards,
Steve Emmerson

Ticket Details
===================
Ticket ID: BMA-267922
Department: Support LDM
Priority: Normal
Status: Closed