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--- public:vmware [2019/08/16 14:48]
ronnie.chan [VDDK Backup Mode]
+++ public:vmware [2019/08/16 14:51]
ronnie.chan
@@ Line 81: / Line 81: @@
 | **Pro**    | Faster backup speed for subsequent backups compared to non-VDDK backup, as a result of backing up only the used size of your VM instead of the entire machine to enhance backup efficiency. This also helps with minimizing the storage size requirement and saving storage cost.       |
 | **Con**    | Require paid license, i.e. VMware Essentials License for usage of vSphere API.     |
+==== Non-VDDK Backup Mode ====
+For VM on VMware host on Enterprise Standard, Enterprise and Enterprise Plus Edition, backup is performed in VDDK mode. Backup in VDDK mode produces a backup chain that consists of a full VDDK file and a set of VDDK incremental files.
+  * During the first backup, full files (e.g. virtual disk file (*.vmdk)) are created in the backup destination.
+  * During subsequent backup, In-file delta - an AhsayOBM feature is employed, to track only data blocks that have change since the last backup.  All changed data blocks are saved as incremental / differential delta files in the backup chain.
+During a subsequent backup in non-VDDK mode, VM files are streamed to the Backup Client Computer, for delta generation:
+| **Pro**    | Free version of ESXi is supported.       |
+| **Con**    | Slower backup speed for subsequent backup compared to VDDK backup, as a result of having the entire VM backed up every time regardless of the actual used size.     |
 ===== Documentation =====

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