On 06/08/2011 11:26 AM, Amir G. wrote:
2. Data blocks are never copied The move-on-write technique is used to re-allocate data blocks on rewrite instead of copying them. This is not something that can be done when the snapshot is stored on external storage, but it can done when the snapshot file lives in the fs.
But does that not lead to fragmentation. And if I am understanding this, the fragmentation will not resolve after dropping the snapshot. So while you do save the overhead on write, you make the user pay on all future reads (that need to hit the disk). -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
