Add copy-on-write support based on qcow2 images #106

priteau opened this Issue Jul 10, 2012 · 0 comments

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Take advantage of images stored in cache to create copy-on-write volumes that store modifications. This should offer good propagation speedups.

@priteau priteau was assigned Jul 10, 2012
@priteau priteau added a commit that closed this issue Jul 17, 2012
@priteau priteau Add copy-on-write support
When this feature is enabled, a copy-on-write volume is created to store
modifications to the virtual machine image.

If the image cache is also enabled, images are directly hard linked from
the image cache into the virtual machine secureimages directory.  These
images stay unmodified because all writes are stored in the
copy-on-write file.

Since this feature is experimental and needs careful management of disk
space, it is disabled by default.

Closes #106.
@priteau priteau closed this in 1d14155 Jul 17, 2012
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