What do you use when you need to move whole banks to other hosts (or
other file systems)?
rsync -e ssh -aAHXx /mount-point r...@remote:/new-mountpoint is very
slow (due to hard link preservation, I presume).
Just dd'ing is out of the question. (E.g. because, in my case, the new
device is slightly (i.e., a few MiB, but still) smaller.)
Do you know some fast way to copy a bank, preserving hard links? OS is Linux.
What I tried:
• see above
• the BSD dump port - it needs too much temp space (i.e., multi-GiB)
for filesystems with a large directory structure and is also quite
slow
I can imagine that making a faster tool that does not have to search
for other files that link there is possible -- in pythocode:
multilinkers = {}
for file in files:
if multilinked(file):
if inode(file) in multilinkers:
link(multilinkers[inode(file)], newname(file))
else:
copy(file, newname(file))
multilinkers[inode(file)] = newname(file)
This should end up using < 1GiB of VM even on pretty big filesystems,
which should be well worth the overhead for faster sync on modern
servers...
But I'd prefer if I didn't have to write it myself...
Yours, Bernd
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