-virt-df is a 'df' tool for printing out the used and available disk
-space in all active and inactive domains. Without this tool you would
-need to log in to each domain individually or set up monitoring.
-
-It is only a proof-of-concept. Please bare in mind the following
-limitations when using this tool:
-
-(1) It does not work over remote connections. Part of the reason why
-I wrote virt-df was to get an idea of how the remote storage API for
-libvirt might look.
-
-(2) It only understands a limited set of partition types. Assuming
-that the files and partitions that we get back from libvirt / Xen
-correspond to block devices in the guests, we can go some way towards
-manually parsing those partitions to find out what they contain. We
-can read the MBR, LVM, superblocks and so on. However that's a lot of
-parsing work, and currently there is no library which understands a
-wide range of partition schemes and filesystem types (not even
-libparted which doesn't support LVM yet). The Linux kernel does
-support that, but there's not really any good way to access that work.
-
-The current implementation uses a hand-coded parser which understands
-some simple formats (MBR, LVM2, ext2/3). In future we should use
-something like libparted.
-
-(3) The statistics you get are delayed. The real state of, for
-example, an ext2 filesystem is only stored in the memory of the
-guest's kernel. The ext2 superblock contains some meta-information
-about blocks used and free, but this superblock is not up to date. In
-fact the guest kernel may not update it even on a 'sync', not until
-the filesystem is unmounted. Some operations do appear to write the
-superblock, for example fsync(2) [that is my reading of the ext2/3
-source code at least].
+Please see the manual page (virt-df.pod or virt-df.txt in this
+directory).
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git.annexia.org / virt-top.git / blobdiff