Which one of the following statements apply to the Free Space Estimator utility?

The Open Systems SnapVault (OSSV) agent and its associated utilities, including the Free Space Estimator (FSE), run on the primary (source) system. The OSSV agent creates and maintains local metadata files, most notably the block map (.bmap) file, which tracks the data blocks on the source volume. This file can consume a significant amount of disk space on the primary system. The FSE utility's function is to estimate the resources required for a transfer, which includes ensuring there is sufficient local disk space on the primary system to accommodate these essential metadata files before an OSSV transfer can be successfully initiated.

A: The FSE utility provides an estimate of the transfer size, which is then used for capacity planning on the secondary. However, the utility itself runs on the primary and does not directly query or determine space on the secondary.

C: This utility is a planning tool used before a transfer to estimate space requirements, not a post-processing tool that runs automatically after a transfer is complete.

D: The FSE utility is a component of the OSSV agent software, which is installed and executed on the primary system (the client being backed up), not the secondary NetApp storage system.

1. NetApp Technical Report TR-3487

"Data Protection Open Systems SnapVault Best Practices and Implementation Guide":

Section 4.1

"Free Space Estimator": "The free space estimator (FSE) utility is a tool that runs on the primary system and estimates the amount of data that will be transferred in the next SnapVault backup." This confirms the utility runs on the primary.

Section 4.2

"Block Map File": "The block map file resides on the primary system... The block map file can be large

so you must ensure that there is enough space on the primary system to store it." This establishes the need to check for sufficient space on the primary system for OSSV operations.

2. NetApp Documentation

"SnapVault for Open Systems 3.0.1 Installation and Administration Guide":

Chapter 5

"Managing SnapVault for Open Systems"

Section "Estimating the transfer size": Describes the svfse command

stating

"The svfse command estimates the amount of data that will be transferred in the next backup update of a primary path to the secondary storage system." This confirms the utility's role and its execution on the primary system.