D-PDM-DY-23 Exam Dumps - Dell PowerProtect Data Manager Deploy Exam

When performing a restore and recovery of anSAP HANAenvironment using PowerProtect Data Manager, the database state is a critical prerequisite.

Database Availability:For a tenant database to be recovered, the specific tenant must be in anOfflinestate. The system database remains online to coordinate the recovery process, but the target tenant cannot be actively processing transactions or have active user sessions while the data files and logs are being overwritten by the recovery process.

Workflow:Typically, the administrator uses SAP HANA Studio, Cockpit, or the HDBSQL command-line tool to stop the tenant database. Once stopped, the PPDM Backint agent can then proceed to restore the requested data backups and apply the necessary logs to reach the desired recovery point.

When protecting Network Attached Storage (NAS) or large server file systems, thenumber of files(often referred to as the " file count " or " metadata density " ) is a primary architectural consideration.

The Metadata Challenge:Large numbers of small files create significant overhead during the discovery and walking phases of a backup. Traditionally, this leads to very slow backups because the system spends more time " opening and closing " files than actually moving data.

Dynamic NAS (DNAS) and Slicing:To address this, PPDM uses theNAS Slicer. It analyzes the file system and breaks it into logical " slices " based on the distribution of data. This allows PPDM to process the file system in parallel using multiple protection engines.

Scaling:Knowing the number of files helps administrators determine how many protection engines (vProxies) are required to meet the backup window. While the " file system type " determines supportability, the " number of files " determines the performance strategy.

To solve the challenges associated with backing up large NAS environments (which often contain millions of small files), PowerProtect Data Manager introducedDynamic NAS (DNAS) Protection.

A key technology within DNAS is theNAS Slicer. Instead of treating a large NAS share as a single serial stream, the NAS Slicer breaks the file system down into smaller, manageable units called " slices. "

Default Slice Size:By default, the NAS Slicer is configured to create slices of approximately100 GB.

Parallelism:These 100 GB slices allow PPDM to distribute the backup workload across multiple protection engines (vProxies) simultaneously. This parallel processing significantly improves throughput and reduces the time required to complete the backup (the backup window).

Functionality:If a specific folder or subtree is larger than 100 GB, the slicer identifies logical break points to maintain these balanced units, ensuring that no single stream becomes a bottleneck for the entire protection job.