Luke Scharf wrote:
Karen Chau wrote:
I understand Legato doesn't work with ZFS yet. I looked through the
email archives, cpio and tar were mentioned. What's is my best option
if I want to dump approx 40G to tape?
Am I correct in saying that the issue was not getting the files to tape,
but properly storing complex permissions and information about the
filesystems?
My read of the thread was that if you use classical Unix permissions (or
don't mind manually resetting ACLs), and don't mind recreating all of
the volumes manually, any traditional backup solution (like tar) will
work fine. After all, you can stat and read the files on a zfs volume!
That is not correct, at least with respect to Legato. The Legato
software aborts the entire backup when it receives ENOSYS from the
acl(2) syscall. Legato receives the ENOSYS because it was trying to
find out how many POSIX draft ACL entries exist on a given file. Since
ZFS doesn't support POSIX draft ACLs it returns ENOSYS. Whereas, other
backup software take the ENOSYS to imply an unsupported operation and
will continue to backup the data without ACLs.
Netbackup will work, but it will silently drop ACLs on the floor.
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