Netbackup Avamar comparison

[pdixon1]

After running a report in Netbackup i would like to compair Kilobytes to the Avamar report.

Avamar reports Bytes protected and Bytes New. 

Bytes Protected is significanty more and bytes new is signigicantly less.

What does the Kilobytes column represent?

[sdo]

I thought I'd run a little test.  Env: NetBackup v8.1.1 on Windows Server 2019.

I created four test folders, and placed small dummy test files, and created four backup policies, and pointed all four policies to plain DSU storage unit.

The backup results were:

test	#folders	#files	desc. of files	backup #files	backup KB
1	1	1	one file of zero bytes	2	7
2	1	10,000	all zero bytes	10,001	25,004
3	1	10,000	all one byte	10,001	25,004
4	1	10,000	all 1018 bytes	10,001	35,004

.

Conclusions:

1) NetBackup counts folders in the "Files" column of Activity Monitor, i.e. "Files" is a misnomer, as it is actually a "leaf object" count and not strictly a "file count".

2) NetBackup has, or reports as having, an overhead of around 2.5 KB of NTFS meta data per leaf object - which makes sense as NetBackup saves file properties such as dates and owner and folder/file access permissions etc.