Status: Accepted
Owner: [email protected]
Labels: Milestone-Release2.13 SmallTask Type-Enhancement Component-storage
Priority-Medium Performance
New issue 991 by [email protected]: Create sparse files when exporting VMs
https://code.google.com/p/ganeti/issues/detail?id=991
While we don't know the content of files, large enough blocks of zeroes can
be made sparse. Since 'cp' already does that, it's just the matter of:
- detecting if 'cp' understands '--sparse'
- during instance export, instead of appending '> file', append '| cp
--sparse=always /dev/stdin file'
See http://en.wikipedia.org/wiki/Sparse_file#Piping
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