An administrator uses VMware Data Recovery to make backups of virtual machines. Checking on
the backup jobs that were run the previous evening, the administrator notices that some jobs
completed but that other jobs did not.
What are two possible causes for the failure? (Choose two.)
A.
The deduplication store had 400GB of available space before the start of the affected jobs.
B.
Eight backup jobs were running simultaneously, causing new jobs to fail to start.
C.
The backup window was not open long enough to retrieve all of the changed blocks.
D.
CPU utilization on the VDR appliance exceeded 90% before one or more jobs executed.
I believe BD is correct.
http://pubs.vmware.com/vsphere-50/index.jsp#com.vmware.datarecovery.admin.doc_20/GUID-A1A9D274-44EA-4237-A8DE-46D01CCE673E.html
An integrity check may have discovered a problem with the integrity of the deduplication store.
The integrity of new backups is checked each day, and the entire deduplication store is checked once a week. If problems are found during the integrity check, the deduplication store is locked. As a result, no backups or restores can be performed until the issues reported by the integrity check are fixed. To resolve this issue, select the problematic restore points on the restore tab, and click Mark for Delete. These restore points are deleted during the next integrity check, after which the deduplication store is unlocked.
If no integrity check problem has been identified, the issue may be due to an excess of jobs. Data Recovery limits the number of jobs that can run to help prevent systems from becoming overloaded and failing to make progress. Some of the limits include:
■Maximum of eight backup jobs can run at the same time.
■Maximum of eight restore jobs can run at the same time.
■Processor utilization must not exceed 90% to start single backups or 80% to start multiple backups.
■The datastore where virtual machines are located must have at least 10 GB of space for indexing and processing restore points and 5 GB of storage space available for each virtual machine to be backed up. For example, to simultaneously back up eight virtual machines that reside on one datastore, 50 GB of storage space should be available with 10 GB for indexing and processing and 40 GB for the virtual machines.
If any of these limits are exceeded, new jobs do not start.