1. Copyright © 2014 EMC Corporation. All Rights Reserved. Advanced Storage Concepts Upon completion of this module, you should be able to: Describe LUN Migration Describe FAST VP Describe FAST Cache Advanced Storage Concepts1

2. Copyright © 2014 EMC Corporation. All Rights Reserved. Advanced Storage Concepts During this lesson the following topics are covered: Benefits of LUN migration Migrating a LUN Pools LUNs expansion procedures Classic LUNs expansion (MetaLUN) concept Lesson 1: LUN Migration and LUN Expansion Advanced Storage Concepts2

3. Copyright © 2014 EMC Corporation. All Rights Reserved. LUN Migration Benefits Storage system tuning feature used to change:  LUN’s type  LUN’s storage pool topology  Location within the storage system  LUN’s capacity No disruption to applications running on the host Can enhance performance or increase disk utilization Thin LUN space reclamation via LUN Migration  Move from a Classic LUN or a Thick LUN Advanced Storage Concepts3

4. Copyright © 2014 EMC Corporation. All Rights Reserved. LUN Migration Restrictions Neither LUN may be a private LUN Neither LUN may be binding, expanding, or migrating Either or both may be metaLUNs Destination LUN may not be in a Storage Group Destination LUN may not be part of SnapView or MirrorView operations Destination LUN may be larger than Source LUN Advanced Storage Concepts4

5. Copyright © 2014 EMC Corporation. All Rights Reserved. LUN Migration Operation Data is copied from Source LUN to Destination LUN  Source stays online and accepts I/O Destination assumes identity of Source when copy completes  LUN ID, WWN  storage group membership Source LUN is unbound after copy completes The migration process is non-disruptive  There may be a performance impact LUN Migration may be cancelled at any point  Source LUN returns to its previous state  Destination LUN is destroyed Advanced Storage Concepts5

6. Copyright © 2014 EMC Corporation. All Rights Reserved. Starting a LUN Migration: Source LUN Storage > Storage Configuration > Storage Pools Advanced Storage Concepts6

7. Copyright © 2014 EMC Corporation. All Rights Reserved. Starting a LUN Migration: Destination LUN Advanced Storage Concepts7

8. Copyright © 2014 EMC Corporation. All Rights Reserved. Viewing LUN Migration State Storage > Storage Configuration > Storage Pools Advanced Storage Concepts8

9. Copyright © 2014 EMC Corporation. All Rights Reserved. LUN Migration Completion Storage > Storage Configuration > Storage Pools Advanced Storage Concepts9

10. Copyright © 2014 EMC Corporation. All Rights Reserved. LUN Migration Considerations Ensure FAST Cache is OFF on LUNs being migrated  Prevents the migration’s I/O from consuming capacity in the FAST Cache LUN migrations into FAST VP pool-based LUNs  Tiering policy determines which tier will be first allocated to LUN migrations with virtual provisioning pool thin LUNs  Lower rate of migration when thin LUN is involved  Depends on thin LUN is populated and how sequential the data is Use ASAP priority LUN migration with normal cache settings with caution Advanced Storage Concepts10

11. Copyright © 2014 EMC Corporation. All Rights Reserved. Pool LUN Expansion Capacity immediately available Thick LUN  Pool must have enough storage for the expansion to succeed Thin LUN  Storage does not need to be available Advanced Storage Concepts11

12. Copyright © 2014 EMC Corporation. All Rights Reserved. Classic LUNs Expansion (MetaLUN) Concepts Aggregation of multiple LUNs to make a new storage object  Aggregation via striping or concatenation  MetaLUN preserves personality of base LUN Striping can preserve performance profile of base LUN  Same RAID type and LUN size must be used  Restriping data from a populated base LUN takes time Concatenation is immediate  Performance profile of components may vary  RAID type and LUN size do not have to be the same Volume Managers and concurrency  Volume Managers can increase concurrency to the storage system  No multi-threading with a metaLUN Advanced Storage Concepts12

13. Copyright © 2014 EMC Corporation. All Rights Reserved. Classic LUNs Expansion (MetaLUN) Guidelines Concatenation – immediate  No performance impact because no data must be moved or copied Striped metaLUN built from scratch – immediate  Create a new base LUN, then expand it  No performance impact; VNX Block OE is aware that no data needs to move Stripe expanding a populated Base LUN - time depends on size of Base LUN  All Base LUN data is read and restriped even if only one block was written Expand a LUN while app is running – time depends on size and workload  All data must be read and striped  Host workload and metaLUN expansion operations share storage system resources Re-stripe time is independent of element size multiplier Expanding more than one LUN at a time per RAID Group is not recommended Advanced Storage Concepts13

14. Copyright © 2014 EMC Corporation. All Rights Reserved. Classic LUNs expansion (MetaLUN) Wizard Advanced Storage Concepts14

15. Copyright © 2014 EMC Corporation. All Rights Reserved. Pool LUN Expansion: Host (Part 1) Advanced Storage Concepts15 12

16. Copyright © 2014 EMC Corporation. All Rights Reserved. Pool LUN Expansion: Host (Part 2) Advanced Storage Concepts16 4 3

17. Copyright © 2014 EMC Corporation. All Rights Reserved. Advanced Storage Concepts During this lesson the following topics were covered: Benefits of LUN migration Migrating a LUN Pools LUNs expansion procedures Classic LUNs expansion (MetaLUN) concept Lesson 1: Summary Advanced Storage Concepts17

18. Copyright © 2014 EMC Corporation. All Rights Reserved. Advanced Storage Concepts During this lesson the following topics are covered: FAST VP functionality Benefits of FAST VP Configuring a heterogeneous Pool Configuring FAST VP Lesson 2: FAST VP Advanced Storage Concepts18

19. Copyright © 2014 EMC Corporation. All Rights Reserved. FAST VP Functionality Software that automates movement of data based on level of activity  More active data on faster drives, less active data on slower drives Less active data can usually be moved from Tier 1 storage without users noticing the difference Uses I/O statistics at a 256 MB slice granularity Advanced Storage Concepts19 LUN 2 LUN 1 Pool BEFOREAFTER Most active data Moderately active data Least active data Flash drives SAS drives NL-SAS drives

20. Copyright © 2014 EMC Corporation. All Rights Reserved. Benefits of FAST VP Eliminates the need to manually migrate LUNs between pools  Automatic data relocation within a tier Rebalances data when drives are added to a Pool Optimizes the use of high performance and high capacity drives Improves performance and cost efficiency Recommended for applications that have workloads that are fairly stable over time VNX provides a unified approach to auto-tiering for file and block data Advanced Storage Concepts20 Pool Data Optimization Rebalancing

21. Copyright © 2014 EMC Corporation. All Rights Reserved. Heterogeneous Pools Advanced Storage Concepts21 Drives LUNs Storage Optimized auto-Tiering NL-SAS FlashSASNL-SAS Pool Most active data Moderately active data Least active data Flash - Extreme Performance SAS Flash SAS - Performance NL-SAS - Capacity Storage Tiers

22. Copyright © 2014 EMC Corporation. All Rights Reserved. Per-Tier RAID Configuration RAID TypePreferred Drive Count Options RAID 1/04+4 RAID 54+1, 8+1 RAID 66+2, 14+2 Advanced Storage Concepts22 Only one RAID type per tier Mix and match in Pool, e.g.  RAID 5 (4+1) for Flash  RAID 5 (8+1) for SAS  RAID 6 (14+2) for NL-SAS

23. Copyright © 2014 EMC Corporation. All Rights Reserved. Storage Tiers TierDrive TechnologyCriteria for Storage Extreme PerformanceFlash (SSD)Response times Performance Serial Attach SCSI (SAS)Performance and Capacity CapacityNear-Line SAS (NL-SAS)Maximum capacity at a modest performance level Advanced Storage Concepts23 NL-SAS (Capacity) SAS (Performance) Flash (Extreme performance ) AUTOMATIC DATA OPTIMIZATION

24. Copyright © 2014 EMC Corporation. All Rights Reserved. Creating a Heterogeneous Pool Storage > Storage Configuration > Storage Pools Advanced Storage Concepts24

25. Copyright © 2014 EMC Corporation. All Rights Reserved. Configuring a Heterogeneous Pool Advanced Storage Concepts25

26. Copyright © 2014 EMC Corporation. All Rights Reserved. FAST VP Policies Start High, then Auto-Tier  Data initially placed in highest tier, then allowed to relocate Auto-Tier  Moves data to a tier based on LUN performance statistics Highest Available Tier  Moves data to the highest tier available Lowest Available Tier  Moves data to the lowest tier available No Data Movement  Moves no data between tiers, and retains the current tier placement Advanced Storage Concepts26

27. Copyright © 2014 EMC Corporation. All Rights Reserved. Managing and Monitoring FAST VP Advanced Storage Concepts27 Use the dropdown to display additional options such as Manual Storage Pool Properties

28. Copyright © 2014 EMC Corporation. All Rights Reserved. Managing Auto-Tiering with Unisphere Advanced Storage Concepts28

29. Copyright © 2014 EMC Corporation. All Rights Reserved. Advanced Storage Concepts29 Starting and Stopping Data Relocation Array-wide Relocation Schedule allows the user to define the days and duration for relocations Each pool has the option of using the array-wide scheduler:  For existing Pools, when FAST VP is installed, the default setting is OFF  For Pools created after FAST VP is installed, the default setting is ON Users can over-ride the setting as needed All Pools have a manual “relocate now” option

30. Copyright © 2014 EMC Corporation. All Rights Reserved. Starting and Stopping Data Relocation Advanced Storage Concepts30

31. Copyright © 2014 EMC Corporation. All Rights Reserved. Unisphere Tiering Summary Advanced Storage Concepts31

32. Copyright © 2014 EMC Corporation. All Rights Reserved. Advanced Storage Concepts During this lesson the following topics were covered: FAST VP functionality Benefits of FAST VP Configuring a heterogeneous Pool Configuring FAST VP Lesson 2: Summary Advanced Storage Concepts32

33. Copyright © 2014 EMC Corporation. All Rights Reserved. Advanced Storage Concepts During this lesson the following topics are covered: FAST Cache functionality Benefits of using FAST Cache Configuring FAST Cache Lesson 3: FAST Cache Advanced Storage Concepts33

34. Copyright © 2014 EMC Corporation. All Rights Reserved. VNX FAST Cache Definition and Functionality Storage system-based licensed software  Uses Enabler FAST Cache extends storage system cache capacity  Adds a second cache tier  Promotes frequently accessed data to Flash drives FAST Cache acts as an application accelerator FAST Cache operations are non-disruptive  Uses existing memory allocation interface and does not use host cycles Can be enabled on Classic LUNs and Pools Advanced Storage Concepts34

35. Copyright © 2014 EMC Corporation. All Rights Reserved. Benefits of VNX FAST Cache Leverages the lower response time and better IOPS of Flash drives  Without dedicating Flash drives to specific applications  Provides Flash drive level performance to the data which is accessed most frequently Reduces the load on other storage system resources Improves Total Cost of Ownership (TCO) of the system Works in a complementary way with FAST VP technology Advanced Storage Concepts35

36. Copyright © 2014 EMC Corporation. All Rights Reserved. VNX FAST Cache Components Policy Engine  Manages the flow of I/O through FAST Cache  Decides when I/O should be copied to HDD and vise versa  Maintains statistical information about the data access patterns Memory Map  Tracks extent usage and ownership in 64 KB chuncks of granularity  Maintains information on the state of 64 KB chunks of storage and the content  A copy is stored in DRAM memory Advanced Storage Concepts36 Host I/O Multicore Cache Multicore FAST Cache SSD HDD (De-stage & Read Miss I/O) Memory Map SSD (Hit) HDD (Miss)

37. Copyright © 2014 EMC Corporation. All Rights Reserved. VNX FAST Cache Operations Host read/write operation  Flash drives are configured as RAID 1 mirror pairs  Application gets the acknowledgement for an IO operation FAST Cache promotion  Data is copied from spinning media HDDs and placed into FAST Cache FAST Cache flush  A FAST Cache page is copied to the HDDs and the page is freed for use FAST Cache cleaning  Process that proactively copies dirty pages to the underlying physical devices Advanced Storage Concepts37

38. Copyright © 2014 EMC Corporation. All Rights Reserved. Configuring VNX FAST Cache Advanced Storage Concepts38

39. Copyright © 2014 EMC Corporation. All Rights Reserved. Creating FAST Cache Advanced Storage Concepts39

40. Copyright © 2014 EMC Corporation. All Rights Reserved. Enabling FAST Cache Classic LUN creation Classic LUN Properties Pool creation Pool Properties Advanced Storage Concepts40

41. Copyright © 2014 EMC Corporation. All Rights Reserved. FAST Cache Column: Unisphere 41Advanced Storage Concepts

42. Copyright © 2014 EMC Corporation. All Rights Reserved. FAST Cache CLI Commands 42 TaskNaviSecCli command Create FAST Cachecache –fast –create Destroy FAST Cachecache –fast –destroy Get FAST Cache infocache –fast -info Configure FAST Cache when creating a Classic LUN bind... –fastcache 0 I 1 Enable or disable FAST Cache on a Classic LUN chglun - -fastcache 0 I 1 Get FAST Cache config info on a Classic LUN getlun -fastcache Configure FAST Cache when creating a storage pool storagepool –create... –fastcache on I off Configure FAST Cache on existing storage pool storagepool –modify –id -fastcache on I off Get FAST Cache state on storage pool storagepool –list –id -fastcache Advanced Storage Concepts

43. Copyright © 2014 EMC Corporation. All Rights Reserved. FAST Cache Configuration Options 43 Storage SystemFlash (SSD) Disk Capacity Maximum FAST Cache Capacity VNX5400100 GB / 200 GB0.5 TB / 1 TB VNX5600100 GB / 200 GB1 TB / 2 TB VNX5800100 GB / 200 GB1.5 TB / 3 TB VNX7600100 GB / 200 GB2.1 TB / 4.2 TB VNX8000100 GB / 200 GB2.1 TB / 4.2 TB Advanced Storage Concepts

44. Copyright © 2014 EMC Corporation. All Rights Reserved. VNX FAST Cache Summary FAST Cache enables the system cache to be expanded by using Flash drives as an additional tier of cache  Allows the storage system to provide Flash drive performance to the most heavily accessed chunks of data FAST Cache absorbs I/O bursts from applications  Reduces the load on backend hard disks  Improves the TCO of the storage solution FAST Cache works in a complementary way with FAST VP technology  Both technologies help in placing data segments on the most appropriate storage tier based on their usage pattern 44Advanced Storage Concepts

45. Copyright © 2014 EMC Corporation. All Rights Reserved. Advanced Storage Concepts During this lesson the following topics were covered: FAST Cache functionality Benefits of using FAST Cache Configuring FAST Cache Lesson 3: Summary 45Advanced Storage Concepts

46. Copyright © 2014 EMC Corporation. All Rights Reserved. Summary Key points covered in this module: LUN migration restrictions include: No private, binding, expanding, or migrating LUNs; Destination not in a Storage Group or part of SnapView/MirrorView operation FAST VP feature automatically migrates the data between storage tiers, and within storage tiers, providing lowest TCO. FAST Cache uses Flash drives and helps with read and write performance for frequently accessed data when this feature is enabled for or LUNs. 46Advanced Storage Concepts