[gpfsug-discuss] tar sparse file data loss

[Greg.Lehmann at csiro.au]

I logged perhaps the original service request on this but must admit we haven’t tried it of late as have worked around the issue.

From: gpfsug-discuss-bounces at spectrumscale.org [mailto:gpfsug-discuss-bounces at spectrumscale.org] On Behalf Of Knister, Aaron S. (GSFC-606.2)[COMPUTER SCIENCE CORP]
Sent: Thursday, 23 November 2017 4:21 PM
To: gpfsug-discuss at spectrumscale.org
Subject: [gpfsug-discuss] tar sparse file data loss

Somehow this nugget of joy (that’s most definitely sarcasm, this really sucks) slipped past my radar:

http://www-01.ibm.com/support/docview.wss?uid=isg1IV96475


Anyone know if there’s a fix in the 4.1 stream?

In my opinion this is 100% a tar bug as the APAR suggests but GPFS has implemented a workaround. See this post from the tar mailing list:

https://www.mail-archive.com/bug-tar@gnu.org/msg04209.html


It looks like the troublesome code may still exist upstream:

http://git.savannah.gnu.org/cgit/tar.git/tree/src/sparse.c#n273

No better way to ensure you’ll hit a problem than to assume you won’t :)

-Aaron
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://gpfsug.org/pipermail/gpfsug-discuss_gpfsug.org/attachments/20171123/9cfba7e8/attachment-0002.htm>