About dynamic scan
For malware scanning on Standard, MS-Windows and NAS-Data-Protection workloads, NetBackup 10.3 introduces feature. This feature provisions all files in the backup images on demand unless the file is accessed and read or there is no overhead on the file's provisioning.
In comparison to traditional scan using Instant Access mount points, dynamic scan optimizes instant access and scan performance for MSDP (for large number of files in the backup). This improves the instant access time as well as the scan performance.
The following table provides the differences between the traditional malware scan and dynamic scan:
Key scanning procedure | Traditional malware scan using Instant Access mount points | Dynamic scan |
|---|---|---|
Instant access stage. | Analyzes the tar stream and builds each file's header and extent map file (LMDB database), which is time consuming for large number of files in the backup. | Restores TIR (catalog database) and IM (image metadata) information from fragment. |
Instant access share (NFS/SMB) is mounted and user tries to list or access the file. | Accesses it's header file and reads the attribute from it. | Query's the directory from catalog database to get all the files and directories which are under this directory. It can also query each files and directories attribute to the output. |
Scan host opens a file | Opens and loads the LMDB database. | Builds the index in memory and reads directly from data container.
|
Scan host reads a file | Searches from LMDB database and reads from data container. | If storage server is 3rd storage vendor, it reads data through OST interface directly. If storage server is PureDisk, it searches from mapping table and reads data from data container. |
NetBackup 10.3 supports Instant Access on OST target volumes backup for malware scanning, and support malware scanning for big ADS information.
For MSDP storage, dynamic scan feature is applied on platform BYO, NBA, Flex, Flex-worm, FlexScale, Azure Kubernetes Services Cluster / Amazon Elastic Kubernetes Cluster.
For OST and Advanced Disk storage, dynamic scan feature is applied only on platform BYO, NBA and Flex appliance.