disk magic for storwize

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© Copyright IBM Corporation 2015

sPE1484Disk Magic Version 9.20.0 Disk Magic for Storwize

Joe Bacco ([email protected])WW Storage Sales Accelerator Tools SupportIBM – Tucson, AZ

2© Copyright IBM Corporation 2014

Disk Magic Learning Guide


Disk Magic HELP (printed help)

There are 747 pages of HELP text.

Please take advantage of this!


Disk Magic HELP (printed help)

There are 387 pages of HELP text.

Please take advantage of this!


Disk Magic HELP


Disk Magic HELP

How to procedures for the many

Controllers and Servers


Disk Magic HELP


Disk Magic – HELP (Release History)


Disk Magic HELP - IOSTAT File Samples

Linux - AIX - HP UX - Solaris


HELP – Easy Tier (Base Calibration)


Disk Magic – Decimal vs Binary

Note: All capacity inputs to Disk Magic are decimal.

Difference between 1 TB and 1TiB is 99,511,627,776 bytes (99.5 GB)


Storwize Product Comparison

Storwize V3500 Storwize V3700 Storwize V5000 Storwize V7000 V7000 Gen2

Machine Type 2071 2072 2077 / 2078 2076 2076

Code Machine Code Machine Code Software Software Software

Standard Host Interface6Gb SAS

1Gb iSCSI

6Gb SAS

1Gb iSCSI

6Gb SAS, 1Gb iSCSI

8Gb FC or 10Gb

iSCSI/FCoE

8Gb FC

1Gb iSCSI1Gb iSCSI

Optional Host Interface 8Gb FC

8Gb FC or

10Gb iSCSI / FCoE or

1Gb iSCSI

None 10Gb iSCSI / FCoE2 x ( 8Gb FC or 10Gb

iSCSI / FCoE )

RAM (per node canister)4GB 4GB or 8GB 8GB 8GB 32GB or 64GB

Expansion enclosures

(per control enclosure)None Up to 9 Up to 19 Up to 19 Up to 20

SSD Support No Yes Yes Yes Yes

Licensed Function

EnforcementNone Keys Honor Honor Honor

Licensed Function Trials No Yes No No No

FlashCopy 64 targets64 targets + license for

moreLicense Yes License

Turbo Performance No License Yes Yes Yes

Remote Copy No License License License License

Easy Tier No License License Yes License

System Clustering No NoYes – 2 control

enclosures

Yes – 4 control

enclosures

Yes – 4 control

enclosures

General External

VirtualizationNo No License

License LicenseData Migration from

external storageYes Yes Yes

Compression No No No License License

Compression Hardware No No No No Yes, plus optional extra

NAS No No No Yes, V7000 Unified Yes, V7000 Unified


IBM Storwize Family (V3700)

1 IO groupSingle chain


IBM Storwize Family (V5000)

2 chains per IO groupR7.4 supports 19 enclosures


IBM Storwize Family (V7000 Gen2)

3 chains per IO group Controller is a separate chain


IBM Storwize Family (V7000 Gen2)

264 drives per IO Group1056 drive MAX11 enclosures per IO Group


Disk Magic – HELP (Release History)• 9.18.4 (January 2015)

– Enabled Real-time Compression with Dual-RACE feature on Storwize V7000 Gen2 (7.4) and SVC DH8 (7.4).

• 9.18.2 (December 2014)

– Added support for 300GB/15k, 600GB/15K, 900GB/10K, and 1.2TB/10K RPM 3.5" drives to Storwize V3500, V3700, and V5000.

– Update of the Global Mirror model for Storwize, now supporting distances up to 25,000 km for R7.4 (and newer).

• 9.18.0 (November 2014)

– Added support for 6TB/7.2k RPM drive to Storwize R7.4.

– Added support for 16 Gb channels to SVC DH8 R7.4 and Storwize V7000 Gen2 R7.4.

– Added support for SVC / Storwize R7.4 control units.

• 9.17.3 (October 2014)

– Added support for Easy Tier version 3 in virtualization cluster models. Also supports the combination of Easy Tier and Real-time Compression.

– Added modeling support for the 600GB/15k RPM drive to Storwize V3500, V3700, V5000, including firmware versions pre-R7.3 (also for V7000).

• 9.17.1 (August 2014)

– Added Tiered Solution Advisor for V7000.

• 9.17.0 (August 2014)

– Added support for the combination of Real-time Compression and Easy Tier in the DSS model of Storwize.

• 9.15.0 (June 2014)

– Added support for Easy Tier 3 on stand-alone V7000 R7.3.


Importance of Calibration – Base vs. Solve

• Creating the baseline model (Base button) enables the dependent proposed hardware models to be calibrated

• Mandatory for System z and System i models

• Not mandatory for open systems modeling

– Highly recommended if you have measured cache hit

statistics

• Create Base ONCE, then use Solve for subsequent what-if scenarios

If you learn nothing else in this class learn this:

Create Base ONCE, then use Solve for subsequent scenarios


Disk Magic Welcome Screen


Disk Magic - Right-click Options


Disk Magic Welcome Selection

SONAS sizing requires special key

obtained from [email protected]


Disk Magic Project Selection


Disk Magic – Storwize SVC/V7000 R7.4

• SVC 2145-CG8 (V7.4)

• SVC 2145-CG8 Dual CPU (V7.4)

• SVC 2145-DH8 (V7.4)

• IBM V3500 (7.4)

• IBM V3700 (7.4)

• IBM V3700 Trb (7.4)

• IBM V5000 (7.4)

• IBM V7000 Gen1 (7.4)

• IBM V7000 Gen2 (7.4)


Disk Magic – Storwize SVC/V7000 R7.4

• SVC 2145-CG8 (V7.4)


• SVC 2145-DH8 (V7.4)

• IBM V3500 (7.4)

• IBM V3700 (7.4)

• IBM V3700 Trb (7.4)

• IBM V5000 (7.4)

• IBM V7000 Gen1 (7.4)

• IBM V7000 Gen2 (7.4)


Real-time Compression™


Storwize V7000 Real-time Compression™ (Gen1)

I would suggest that Gen 1 not be used for RtC!


Storwize V7000 Real-time Compression™ (Gen2)

Number of Node Pairs: 1 to 4

Compression Accelerator Cards (per node pair): 2 or 4

Recommend using extra memory (128GB) for RtC!


Storwize SVC DH8 Real-time Compression™

Number of Node Pairs: 1 to 4

Compression Accelerator Cards (per node pair): 2 or 4

Storwize V7000 Real-time Compression™


Create a Base without RtC



Define the Disk configuration



Define the Workload parametersSelect Base



Successful BaseGo to General Tab



Select Real-time CompressionSet Compression Accelerator Cards to 4System Memory is 128 GiBGo to Open Workload



RtC enabled Cap % 100.0Compression (%) 50Select SolveModel SolvesLook at utilizations



Look at utilizationsRED is not Good



RtC enabled Cap % 50Compression (%) 50Select Solve



UtilizationsGREEN is Good


Easy Tier®


Storwize ET3 (requires R7.3)

ET3 - 3 tiers or any 2 tiers

• SVC 2145-CG8 (V7.3)


• SVC 2145-DH8 (V7.3)

• IBM V3700 (7.3)

• IBM V3700 Trb (7.3)

• IBM V5000 (7.3) Standalone and Virtualized

• IBM V7000 Gen1 (7.3)

• IBM V7000 Gen2 (7.3)

Tier 0 Tier 1 Tier2

SSD ENT NL

SSD ENT NONE

SSD NL NONE

NONE ENT NL

SSD NONE NONE

NONE ENT NONE

NONE NONE NL


Skew

A value that expresses the amount of IO that occurs on a subset of data.

– Used by Disk Magic to model and predict performance of a given configuration

– Can be estimated or in some cases calculated by Disk Magic - from data sourced by DSCLI commands and TPC reports from some DS8000 systems.

Below are the predefined skew levels in Disk Magic

– Very Low Skew (2)

• Extremely conservative level

• High percent of IO across high percent of data / capacity

– Low Skew (3.5)

– Intermediate Skew (7)

– High Skew (14)

• Due to some positive field experience this value was “promoted” to the default and often

recommended value

• High percent of IO across relatively small portion of data capacity

– Very High Skew (24)

• Aggressive approach, you should have a reason to anticipate this value, or model it among

several possibilities.


Skew - Graph

In this chart the intermediate skew curve (the middle one) indicates that for a fast tier capacity of 20% Easy Tier®

would move 79% of the Workload (I/Os) to the fast tier.


Easy Tier® – Disk Magic Capabilities

� Supports input of the anticipated skew level

– Disk Magic predefined skew value to explore possible impacts … Or

– Calibrated / measured value from data collected in some environments

• Example 1: TPC reports plus DSCLI command output from existing DS8000 systems

• Example 2: Calculated from some Zseries data collections

� The skew tells Disk Magic how much IO to assign to each tier.


Easy Tier® – Disk Magic Capabilities (continued)

� Automatically explore impact of skew variation by modeling & charting

multiple skew rates in one command.



� Automatically explore impact of skew variation by modeling & charting

multiple skew rates in one command.



� Report function quantifies the configured tiers and the resultant amount of

IO assigned to each tier – for the chosen/solved skew.

� Note: All standard charting functions – utilization of other disks, response

time, etc., reflect any improvement achieved based on the configuration -

i.e. the disks you populated in the tiers, the chosen skew rate, etc.

This example used a “high” skew (14)

• 7% of the capacity is SSD

• 72% of the IO routed to SSD


Easy Tier® – Disk Magic (Tiered Solution Advisor)

Tiered Solution Advisor - HELP



Start with a Base or a Solve configurationOn the Disk Tab select Tiered Solution Advisor



Required EntryMaximum service time (ms) and Skew



Tier Options Type: 1) Do not use 2) Any 3) Particular drive type



Make your selectionsSelect Calculate



Results. If you would like to investigate this configuration the Select Create model.Try another Solution



Try another Solution; 900 GB Tier 1Select calculate



This time we got a 3 tier solution.Select Create model. Try as many solutions as desried then Select Close



Now you can investigate and change all models as usual.


Easy Tier® & Disk Magic Graph – All Skew Levels


Easy Tier® & Disk Magic Graph – All Skew Levels

0

1

2

3

4

5

6

2000024000280003200036000400004400048000520005600060000640006800072000760008000084000

Total I/O Rate (I/Os per second)

Se

rvic

e T

ime

in

ms

(O

pe

n)

Solve # 2 - V7000 Gen2 (7.3) (V7000

Gen2) / Very low skew

Service time (ms)

Solve # 2 - V7000 Gen2 (7.3) (V7000

Gen2) / Low skewService time (ms)

Solve # 2 - V7000 Gen2 (7.3) (V7000Gen2) / Intermediate skew

Service time (ms)

Solve # 2 - V7000 Gen2 (7.3) (V7000

Gen2) / High skew

Service time (ms)

Solve # 2 - V7000 Gen2 (7.3) (V7000

Gen2) / Very high skewService time (ms)


Merge Servers and Controllers


Disk Magic – Combine servers onto one controller

Combine the 2 servers onto one controllerRight-click top model and select Duplicate



Now Server2 controller must be copiedRight-click on Server2 controller and select Copy to Clipboard



Now Server2 controller must be copied

Right-click on Copy model and select Paste copied DSS



Now both Servers and controllers are in the same modelNext merge the Controllers onto one


Merge Controllers

Disk Magic – Merge controllers onto one


Right-click V3700 Turbo1




And Select MergeAdd to Merge Source Collection and create New Target



Change Controller to V5000 (7.4)Select Start Merge



New Controller Model is in MargeResult1

© Copyright IBM Corporation 2015

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