--tmpdir= should change the tmp directory for streaming all files, not just for backup-my.cnf

[Brad Lang]

When I do a

innobackupex --user=backupuser --password=<password> --stream=xbstream --tmpdir=/mnt/lv1/tmp /doesntneedtoexist | ssh <email address hidden> "xbstream -x -C /backups/<dir>/base-<year-month-day>/"

on a large database (5TB in my case), the OS disk fills up before the backup finishes. xtrabackup 2.0.3 seems to store files in /tmp before streaming them over to the backup location near the end of the process. I found the culprit with
sudo lsof | grep '(deleted)'
which I'm pretty sure was a giant ibdata1.

So --tmpdir= doesn't seem to work for the most important, largest files. I had to symlink /tmp to my /mnt/lv1/tmp so I could actually complete the backup. It does seem to change the directory for backup-my.cnf

[Jervin R (revin)]

This appears to be a duplicate of https://bugs.launchpad.net/percona-xtrabackup/+bug/1085099