InstallUserGuide.pdf

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NetApp® Operations Manager
Efficiency Dashboard
Installation and User Guide
A Storage Utilization and Storage Efficiency Measurement
Tool
Version 1.3
November, 2011
Table of Contents
NetApp® Operations Manager ........................................................................................... 1
Efficiency Dashboard.......................................................................................................... 1
Installation and User Guide ................................................................................................ 1
A Storage Utilization and Storage Efficiency Measurement Tool ..................................... 1
1 Overview ..................................................................................................................... 3
1.1 Storage Utilization................................................................................................ 3
1.2 Storage Efficiency ................................................................................................ 4
2 How to Install the Efficiency Dashboard Tool ........................................................... 7
3 Using the NetApp Efficiency Dashboard Tool ........................................................... 9
3.1 Analyzing Storage Utilization .............................................................................. 9
3.1.1
Storage Utilization Chart ............................................................................ 10
3.1.2
Raw Capacity Breakdown Chart ................................................................. 11
3.1.3
Unused Reserve Capacity Breakdown Chart .............................................. 13
3.2 Analyzing Storage Efficiency ............................................................................ 14
3.2.1
Storage Efficiency Chart ............................................................................. 14
3.2.2
Storage Efficiency Returns Breakdown Chart ............................................ 15
4 Exporting Data from the Efficiency Dashboard Tool ............................................... 17
5 Limitations ................................................................................................................ 18
6 Appendix ................................................................................................................... 18
List of Figures
Figure 1 Raw Storage Capacity High-Level Breakdown ................................................... 3
Figure 2 Storage Efficiency Returns and Effective Used Capacity .................................... 5
Figure 3 Storage Utilization Section of the Storage Efficiency Dashboard Tool ............. 10
Figure 4 Storage Utilization Chart .................................................................................... 11
Figure 5 Raw Capacity Breakdown Chart Example ......................................................... 12
Figure 6 Unused Reserve Capacity Breakdown .............................................................. 13
Figure 7 Storage Efficiency Section of the Storage Efficiency Dashboard Tool ............. 14
Figure 8 Storage Efficiency and Raw Storage Efficiency Chart ...................................... 15
Figure 9 Storage Efficiency Returns Breakdown Chart Example .................................... 16
1 Overview
The NetApp® Operations Manager Efficiency Dashboard is a new tool to allow
customers to determine how well they are using both NetApp storage and NetApp
technology. Before getting into the details of what the tool will show you, we need some
key terminology defined. These terms (and the underlying calculations) have been
defined by the NetApp Storage Efficiency Team for usage in NetApp products and
documentation.
Although there is a fair amount of new terminology defined by this group, they are
centered on two major concepts:
Storage Utilization
and
Storage Efficiency.
Most of
the remaining terminology represents a breakdown of these major concepts.
1.1 Storage Utilization
What is
Storage Utilization?
This major concept answers the question, “How well am I
using the storage available to me?”
Figure 11 below is a simple picture to help the reader understand this concept. It
represents a basic view of the
Raw Capacity
installed in the data center. Some of this
storage is reserved for system usage and not available for user and application data. The
terminology for this capacity area is
System Reserve Capacity.
It includes things like
Checksum overhead, WAFL reserve, RAID configuration (hot spares, parity drives, etc).
In short, the
System Reserve Capacity
provides a lot of key functionality, protection,
etc. but no real data can go there.
Figure 1 Raw Storage Capacity High-Level Breakdown
If we subtract the
System Reserve Capacity
from the
Raw Storage,
we end up with the
capacity that can hold user and application data. This remaining storage is called the
Usable Capacity.
Any real data you put in this area constitutes the
Used Capacity.
To
calculate
Storage Utilization,
divide the
Used Capacity
by the
Usable Capacity.
Note
that we also have another term called
Raw Storage Utilization
which uses the
Raw
Capacity
as the denominator instead of
Usable Capacity.
To keep things simple, this
document will concentrate on
Storage Utilization.
The tool will actually calculate both
values for the user.
The value of
Storage Utilization
can never exceed 100% but what is a good number to
have? The quick answer is the higher your number is, the better you are doing. A good
target value to shoot for is 80%. If you are higher than 80%, you are doing a great job. If
you are at 40%, you are spending twice as much on your storage in terms of capital
expenditure, operational costs, environmental costs, etc. as the person with an 80%
Storage Utilization.
If your percentage is low, then you will probably ask why and what
can be done to increase the value. Examples of this will be shown later in the document.
The Usable Capacity as shown in
Figure 11 is comprised of three sub-categories:
•
Used Capacity
(contains real data)
•
Free Capacity
(free space available to users and applications)
•
Unused Reserve Capacity
(Aggregate Snapshot Reserve, Volume Snapshot
Reserve, Volume/LUN/File Guaranteed Space, and Fractional Reserve)
We will see the importance of these categories later in this document because there are
definitely places where the user does have control, and the ability to improve the
Storage
Utilization.
The tool will also show the actual breakdown of the
System Reserve
Capacity
as two major areas:
•
Fixed Reserve Capacity
(Kernel, WAFL Reserve, Checksums, etc.)
•
RAID Reserve/Spare Drive Capacity
(Hot spares, Parity drives)
This User Guide will use simple examples to walk the reader through these capacity
breakdowns in terms of what to look for in the output and what to do with the
information.
1.2 Storage Efficiency
Storage Efficiency
addresses the question, “How much more storage would I have
needed, had I not been using key NetApp technology like deduplication, cloning,
snapshots, etc.? For example, if you have a 100 GB volume and you build 10 FlexClones
from it, there is no space actually taken but, without this technology, your option would
have been to provide additional storage for 10 full volume copies (1 TB of storage in this
case). Likewise, using NetApp deduplication technology against a number of volumes,
you remove 50 TB of duplicate blocks. Without this dedupe technology, you would have
needed to add the 50 TB of real storage.
There are currently five areas contributing to
Storage Efficiency
calculation. The
collection of these savings is known as
Efficiency Returns.
The following list is the
current set of
Efficiency Returns:
•
•
•
•
•
Cloning Returns
(FlexClone savings calculated as the size of the clone parent
volume)
Dedupe Returns
(Deduplication, and LUN/File Clone savings calculated as the
capacity reclaimed due to these technologies)
Snapshot Returns
(Space savings due to NetApp Snapshot compared to full
volume copy. Calculated as the volume used capacity minus the physical space
consumed by snapshots. It is independent to the number of active snapshots)
RAID-DP Returns
(Savings realized by comparing to RAID 10 to get the
equivalent levels of protection and performance as RAID-DP)
Thin Provisioning Returns
(Savings resulting from over-provisioning volumes)
The last two categories (RAID-DP
Returns
and
Thin Provisioning Returns)
are
currently not included in the total
Storage Efficiency
calculation but the values for each
are displayed in the
Efficiency Return
breakdown in Section 3.2.2. The combination of
Efficiency Returns
and
Used Capacity
is known as the
Effective Used Capacity.
This
is shown in Figure 22 below.
Figure 2 Storage Efficiency Returns and Effective Used Capacity
The
Storage Efficiency
is then calculated by dividing the
Effective Used Capacity
by
the
Usable Capacity.
Note that the tool will also calculate the
Raw Storage Efficiency

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