readme for the ceph example

svenwiltink · Oct 5, 2021 · 82a4ee1 · 82a4ee1
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+### ceph-import-diff
+
+Proof of concept of sending sparse files to a ceph cluster. It creates a valid `export-format 2` stream that can be
+piped to `rbd import`.
+
+Example command: 
+```
+./ceph-import-diff vps.raw | pv | rbd import --export-format 2 - libvirt-pool/banaan
+7,07GiB 0:00:53 [ 134MiB/s]
+```
+
+Compared to the normal import of the same image:
+```
+pv vps.raw | rbd import - libvirt-pool/banaan
+200GiB 0:04:46 [ 714MiB/s]
+```
+
+A savings of 193GiB and nearly 4 minutes