IBM® Edge2013 - Introduction to IBM XIV Storage System
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Transcript of IBM® Edge2013 - Introduction to IBM XIV Storage System
© 2013 IBM Corporation
Session 1029 Introduction to IBM XIV Storage System and What Makes It Unique
Jack Arnold - IT Management Consultant
15 May 2013
© 2013 IBM Corporation
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XIV – IBM System Storage™
� Founders are 5 graduates of Talpiot
� 14th class (XIV=14 in Roman numerals)
� Chief Architect and IBM Fellow - Moshe Yanai –Formerly EMC’s CTO–Led the development of the Symmetrix and DMX systems
� Founded in 2002
� 1st customer system installed in early 2005http://funds.globes.co.il/serveen/globes/docview.asp?did=1000394326&fid=942
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Do It Yourself Supercomputers
“PlayStations power Air Force supercomputer”http://news.cnet.com/8301-17938_105-20025680-1.html
http://www.af.mil/news/story.asp?id=123233543
(Credit: Air Force Research Laboratory)
“1716 Sony PS3 processors…35th or 36th most powerful supercomputer in the world”
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Supercomputers
� Climate change research gets petascale supercomputer
� 1.5-petaflop IBM Yellowstone system runs 72,288 Intel Xeon cores
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http://www.computerworld.com/s/article/9232382/Climate_change_research_gets_petascale_supercomputer
Image courtesy of
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Cache
� 24GB of per module x 15 modules
� 360 GB of cache – 45 GB for Linux = 315 GB usable
� More than 1 GB of cache per usable TB!
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Cache Is Distributed Not Centralized
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IBM XIV Storage System – 1TB
� 180 disks per rack (12 * 15), each disk is 1TB 7200 RPM
� Single rack provides 79TB usable capacity
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Full Rack Power Consumption
–7.7 KW, 180 1 TB spindles, 79 TB usable capacity, 97 W / TB–7.3 KW, 180 2 TB spindles, 161 TB usable capacity, 45 W / TB–6.7 KW, 180 2 TB spindles, 161 TB usable capacity, 42 W / TB–7.0 KW, 180 3 TB spindles, 243 TB usable capacity, 29 W / TB
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XIV SSD Solution
� High capacity SSDs used as secondary read cache
– 480 GB enterprise-class SSD device added to each module
– 7.2 TB of cache per full rack
– Housed in PCI caddy in rear of module
– Scales with the system – 6 to 15 SSD drives
– Must be added to all modules together
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Storage Efficiency
0
100
200
300
400
500
100TB 200TB 400TB 800TB
15K 3.5"
7200 3.5"
Tape
RelativePower @ typical R/W operation load
Source: IBM data, 2009
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IBM XIV Storage System – The Quest
… at 7200 RPM (SATA or NL SAS) cost
Delivering Fibre Channel performance…
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IBM XIV Storage System – The Promise
Tier 1
- Performance
- Reliability
- Capability
At a Tier 2 price!
Or put another way
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Industry Standard Components
Processors – Intel Quad-Core (1 or 2)
Connectivity – 1Gb Ethernet or Infiniband
Disks – standard 7200 RPM (SATA or NL SAS)
Rack – was industry standard (APC), now IBM T42
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Lower TCO
XIV Brand X
(such as E** or H**)
Remote Replication
$$$$ or €€€€
Point in Time Copy
$$$$ or €€€€
Multi-path Drivers
$$$$ or €€€€
Management Software
$$$$ or €€€€
Host Attach $$$$ or €€€€
No additional charge
No additional charge
No additional charge
No additional charge
No additional charge(we use native drivers)
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LUN Creation
�LUNs are allocated in 17 GB chunks
�Volumes can be dynamically resized (increased only)
–Primary and Secondary in a synchronous mirroring relationship will be resized
�User does not plan the layout of the volumes relative to physical drive resources
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LUN Creation
Decisions
�What type of disk (SATA, Fibre Channel)
�What size disk (73GB, 146GB, 300GB, 450GB)
�What speed disk (10K RPM, 15K RPM)
�What RAID level?
�Which set of disks (array)?
�Do I need tiers of storage?
XIV – tierless (tear-less!) storage
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On-going Management Effort: None
All spindles are always utilized
–No management effort or optimization
–No Hot-Spots
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Global Hot Spare Storage Capacity Concept
� Traditional approach
– Dedicated Hot spare drives
� With the IBM XIV Storage System, each disk is utilizing 95% of its space
– The system provides enough hot spare capacity to tolerate a sequence of three disk failures and one module failure, all while still providing redundancy
� Upon a failure, the system returns to redundancy
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XIV Disks Drives 1-12
Drawers 1-15
Break data into1MB chunks
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How Do You Get From 180TB to 79TB?
180 TB-15 drives for redundant capacity for drive and drawer failures- 7 TB for a year’s worth of performance data, system dumps, metadata=158
158 / 2 (for duplicating data) = 79
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All Drives Have Same Amount of Activity
Makes predictive analysis very good
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Aggressive Monitoring of Drives
X
80% of drives returned have been administratively failed
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XIV Disks
Drawers 1-15
180 MB LUN(not possible,illustrative purposes only)
Drives 1-12
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Disk Rebuild Times – 1TB Drive
Hours
XIV Other
30 minutes!(30-35 minutes is maximum on afull system)
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Rebuilds Take a Long Time
RAID 5: theory & realityhttp://www.zdnet.com/blog/storage/raid-5-theory-reality/983
“A 2 TB drive might take 40 hours or more to restore.”
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Traditional RAID-5 (IBM, EMC, HDS) Rebuild
Data Data Data Data Data Data Data Spare
Data Data Data Data Data Data Data
X
X
Cache6 drives read… 1 drive writes
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XIV Disks Participating in “Rebuild” 179!
X
(168 for reads)
Technically, not a rebuild but rather a “re-gaining redundancy”)
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XIV Disks Drives 1-12
Drawers 1-15
Data is never duplicated inside the same drawer
180-12
168
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Smart “Rebuild” (regaining redundancy)
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Adding more Storage Capacity
Data is automatically rebalanced
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Managing StorageStorage Pool
Total Capacity
Consistency group
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Storage Pools – Regular and Thin Provisioning
256 pools maximum
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Creating Point in Time Copies (Snapshots)
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Restore From Point in Time Copies – Brand X
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Restore From Point in Time Copies – XIV
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IBM XIV Data Migration Feature
Migrates data from brand x boxes to XIV- One outage to connect the box- Then transparent migration of LUNs (can be thin-provisioned)- Tunable: 300GB/hr -> 1TB/hr
EMCHDS
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IBM XIV Data Migration Feature
One way transfer from brand x boxes to XIVThen two way communication with server- 512 LUNs from 4 different targets
EMCHDS
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The Problem
Long distance and low bandwidth
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The Solution - Offline Initialization
Tape Tape
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Brand XStorage
Web Hosting on VMware, Brand X
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Web Hosting on VMware with XIV
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