planning and building tiered storage
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Planning and Building Tiered Storage
Brad O’NeillSenior Analyst and ConsultantTaneja Group, Inc.
Agenda
What is Tiered Storage
A Planning Strategy for Tiered Storage
Example Deployment Scenarios
Conclusions
Q&A
A Definition of Tiered Storage
“The deployment of two or more classes of
disk storage within a primary or
secondary storage environment, wherein
the residence of data across these
classes of storage is determined by
business-driven variables.”
Sounds Complex, But…
Tiered Storage Is Straightforward 1. You deploy multiple classes of storage
• FC, SCSI, SATA, TAPE
2. You might move data from various apps across those storage classes, or, just originate your data assets on the right class• Online migration, disk archiving, disk backup
3. You do this to create efficiencies in time, money or other resources• Improve operations, boost ROI, increase productivity
The Net-Net on Tiered Storage
Forget all buzzwords. It’s about data placement on cost/performance appropriate storage.• Largely manual, not automated
• 50% of tiered storage: originate on the right platform
• Yes, future ILM dreams will leverage the storage classes we create today
What really kicked-off this trend? ATA/SATA.• To reduce primary and secondary storage costs
• To increase recovery and data protection measures
• Critical mass of vendor announcements
• 53% of surveyed users intend to deploy disk by 2005!
Something the industry forgot to mention…
Tiered Storage MANAGEMENT!
BEFORE you deploy, you need a tiered
storage management strategy!
BEFORE you evaluate vendors, you need
a tiered storage management strategy!
BEFORE you even think about devices,
you need a tiered storage management
strategy!
Fail to Plan, Plan to Fail!
“Our first tiered storage deployment wasn’t planned as such. We jumped at the cost savings. We bought ATA arrays and started loading up… If I could do it over, I would have spent a lot more time on planning.”
Director of Storage, Retail, California
TIERS OF STORAGE
H O S T S
4
2 3
Applications Web Database Backups
STRATEGY!
1
YOUR STRATEGY WILL DETERMINE SUCCESS!
5 Planning Steps for Tiered Storage
1. Define your business drivers: Why do this?
2. Define storage “asset classes and traits”
3. Evaluate architectural choices
4. Go out and whip your vendors
5. Deploy your plan
1. Define Your Business Drivers
Do you seek to improve data protection?
(RTO, RPO, Availability, Backup windows)
Are you solving compliance requirements?
(disk-based archives, tape archives, accessibility)
Are you aiming to reduce capital outlays?
(Footprint control, utilization improvements)
Can you need human management efficiencies?
(Few heads, higher managed capacities, wider roles)
5 Planning Steps for Tiered Storage
1. Define your business drivers: Why do this?
2. Define storage “asset classes and traits”
3. Evaluate architectural choices
4. Go out and whip your vendors
5. Deploy your plan
2. Create Asset Groups and Traits
ID the data assets against descriptive “groups”.
Make these grouping more specific or less specific as required!
• BUSINESS-CRITICAL
(Primary data. Traditional “5 9’s”, High availability)
• BUSINESS-OPERATIONS
(Primary data. Share-intensive, reference data, aging data)
• PROTECTION and ARCHIVAL
(Primary or Secondary data. Reference, copies and protection)
• LONG-TERM ARCHIVAL
(Secondary data. No day-to-day use, long-term retention)
Assign All Your Storage Using Resources To Asset Groups!
ASSET GROUPS
H O S T S
Applications Web Database Backups
Which Group?
Biz Critical Biz Ops Protection/Archival Long-Term
EXAMPLE ASSET GROUPINGS
BUSINESS-CRITICAL
“My Oracle databases”
“Our ERP data… all of it”
BUSINESS-OPERATIONS
“Our MS Exchange”
“Departmental Files”
PROTECTION and ARCHIVAL
“Copies of SQL Server data sets”
“Completed trade contracts”
“All compliance information”
LONG-TERM ARCHIVAL
“Stuff we don’t use but have to keep”
“Our last ditch DR bucket”
2. Create Asset Groups and Traits
ID concrete STORAGE TRAITS for each ASSET GROUP:
• Uptime Goals
• Performance requirements
• Protection needs
• Mirrors/Snapshots/Other SW reqs
• Security and access
• Fully Loaded Target Price/Managed TB
Asset Groups + Storage Traits = Storage Tiers
How Did We Get Our Tier Definitions?
All data assets are assigned to groups
The traits of each group were defined
As a Result, We Then Know:
The expected service level from each storage tier
The desired price-points for each storage tier
Therefore, We Have A Tiered Storage Plan!
2. Create Asset Groups and Traits
Asset Groups Drive Your Tier Choices
ASSET GROUPS/STORAGE TIERS
H O S T S
4
2 3
Applications Web Database Backups
Groups/Tiers
Biz Critical Biz Ops Protect/Archival Long-Term
1
5 Planning Steps for Tiered Storage
1. Define your business drivers: Why do this?
2. Define storage “asset classes and traits”
3. Evaluate architectural choices
4. Go out and whip your vendors
5. Deploy your plan
3. Evaluate Architecture Choices
Guidelines We’ve Heard From Your Ranks:
1. “Do Not Create Net-New Management”
2. “Look beyond array pricing alone”
3. “Take an infrastructure-wide approach”
4. “Execute your tier strategy in stages”
So, Where To Begin?Your Tier 1 Business Critical Storage Sets The Pace.• Your Crown Jewel Assets
• Most Expensive Storage Investment
• Disruption and Change Management are painful
• Your High Bar for Storage Management practices
95% of Tiering Strategy centers on Tiers 2 and 3: Business Operations and Protection/Archiving Tiers• “How Do We Improve our Tier One ROI?”
• “How Do We Get Less Critical Data on Cost-Appropriate Storage?”
• “How do we leverage disk to improve data protection?”
Key Points For Tier 2 Evals: “Business Operations” Storage
SATA pricing is still all over the map! Examine best of breed approaches vs. your asset groups• From under $4000 to $15,000+ per TB!
Protection matters. What do you need?• RAID support in SATA typically 0,5
Given asset groups, how much performance?• SATA performance gains are real and coming fast
• Smaller cache sizes in most SATA arrays
How much capacity growth?• Can you maintain existing management framework?
Decide if you need a Stand-Alone array or disk-space in a unified platform.
Multi-disk Systems Mix FC and SATA trays in the same array Example vendors: EMC, HDS, 3Par, BlueArc, Pillar
Stand-alone SATA arrays• Plethora of players from entry-level to enterprise
• Example vendors: NetApp, IBM, NexSan, Candera
Of course, Pros and Cons To Both Approaches!
Key Points For Tier 2 Evals: “Business Operations” Storage
Key Points for Tier 3 Evals: “Protection and Archival”
What asset you archive or protect drives your choices:
Standard SATA array Online copies of data
CAS Software or Appliance Online archiving of reference information
Virtual Tape Software or Appliance Fast disk-based data protection
Traditional BU/R Software to Disk Fast disk-based data protection
5 Planning Steps for Tiered Storage
1. Define your business drivers: Why do this?
2. Define storage “asset classes and traits”
3. Evaluate architectural choices
4. Go out and whip your vendors
5. Deploy your plan
Choosing The Right Solutions
Sage End User Comments
“Look wider than you usually do.”• Resist temptation to roll with your existing trusted vendor
“Tiered Storage Has Many Purchasing Impacts”• Tier One = Potential footprint impact from offloading
• Tier Two = unique requirements for primary
• Tier Three = backup or archiving requirements driven by higher tiers
“If you go ‘best of breed’, ensure management commonalities across tiers”• You can create more problems than you solve.
2 Key Questions For All Vendors
“How will I move and place my data?” Volume-level copy/snapshots
File-level copy
Application-integrated/controlled
“Can I use my existing management tools?” Discovery, partitioning, provisioning
Capacity management, device-level management
Drill the emerging vendors on these points
Who Are Some Worthy Players?
In Tier 2 “Business Operations”• EMC, NetApp, HDS, IBM, STK
• NetApp, BlueArc, 3Par
• Candera, NexSan
In Tier 3 “Protection and Archiving”• STK, ADIC, Quantum
• Diligent
• EMC Centera, Permabit, DCT, Archivas
Deployment Example
Company #1: Financial Services, East Coast
220 TB primary storage on Tier One
Wants to reduce Tier 1 footprint growth by 50%Deploys combination of two SATA vendors for Tier Two
assets. Uses existing SM tools for migration.
Has a disk-backup appliance at Tier Three, exploring CAS for compliance archiving.
Maintains tape libraries, exploring CAS for long-term disk.
Deployment Example
Company #2: Online/Store Retailer, California
10 TB primary storage on SAN. 5 TB on Tier One storage.
Happily w/ deployed disk backup for Tier 3.
In 2005, will deploy Tier 2 on SATA.
Goal is to reduce total amount of storage in Tier 1 by 3 TB via migrating less critical SQL Server and MS Exchange to SATA
Will use existing volume management software
Conclusions on Tiered Storage
Plan before you leap. Think deeply in terms of asset groups and storage traits.
Move in steps. Resolve for key business drivers first. You have plenty of time.
Look at all the vendors. Choices abound!
Preserve your existing management investments
Conclusions on Tiered Storage
Call us if you need help or input!
Taneja Group works with dozens of end
users on RFPs and general questions
Info@tanejagroup.com
Brad@tanejagroup.com
925.417.0329
Questions!
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