Comment 6 for bug 977998

Andrew,

Thank you for tracking down the problem.

From the libarchive man page, it looks like the 'restricted' PAX format would remove the 8 GB limit and avoid the extended keyword at the same time (if possible). Though looking at the source, files larger than 8 GB set the 'need_extension' flag and thus trigger the extended attributes even with the restricted PAX format. Those warnings are benign, but I guess they would cause a lot of confusion for users, and a lot of work on answering the related questions for us.

However, since XtraBackup uses bundled libarchive, I'm going to fix this by modifying libarchive source to suppress those SCHILY.* attributes that GNU tar is unhappy with. GNU tar is a requirement for tar streams generated by XtraBackup anyway, so we can safely assume those attributes are never used.

Thanks again for your help in verifying this bug.