Advanced Storage Concepts

1. Advanced Storage Concepts Upon completion of this module, you should be able to: Describe LUN Migration Describe FAST VP Describe FAST Cache Advanced Storage Concepts

2. Advanced Storage Concepts Lesson 1: LUN Migration and LUN Expansion During this lesson the following topics are covered: Benefits of LUN migration Migrating a LUN Pools LUNs expansion procedures Classic LUNs expansion (MetaLUN) concept Advanced Storage Concepts

3. 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 Concepts

4. 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 Concepts

5. 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 Concepts

6. Starting a LUN Migration: Source LUN Storage > Storage Configuration > Storage Pools Advanced Storage Concepts

7. Starting a LUN Migration: Destination LUN Advanced Storage Concepts

8. Viewing LUN Migration State Storage > Storage Configuration > Storage Pools Advanced Storage Concepts

9. LUN Migration Completion Storage > Storage Configuration > Storage Pools Advanced Storage Concepts

10. 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 Concepts

11. 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 Concepts

12. 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 Concepts

13. 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 Concepts

14. Classic LUNs expansion (MetaLUN) Wizard Advanced Storage Concepts

15. Pool LUN Expansion: Host (Part 1) 1 2 Advanced Storage Concepts

16. Pool LUN Expansion: Host (Part 2) 3 4 Advanced Storage Concepts

17. Advanced Storage Concepts Lesson 1: Summary During this lesson the following topics were covered: Benefits of LUN migration Migrating a LUN Pools LUNs expansion procedures Classic LUNs expansion (MetaLUN) concept Advanced Storage Concepts

18. Advanced Storage Concepts Lesson 2: FAST VP During this lesson the following topics are covered: FAST VP functionality Benefits of FAST VP Configuring a heterogeneous Pool Configuring FAST VP Advanced Storage Concepts

19. FAST VP Functionality Pool • 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 BEFORE AFTER Flashdrives LUN 1 SASdrives LUN 2 NL-SASdrives Most active data Moderately active data Least active data Advanced Storage Concepts

20. 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 Rebalancing Rebalancing Data Optimization SAS NL-SAS Pool FLASH New FLASH Advanced Storage Concepts

21. Heterogeneous Pools Drives NL-SAS Flash SAS Storage Tiers Flash SAS NL-SAS Flash - Extreme Performance Storage SAS - Performance Pool NL-SAS - Capacity Most active data LUNs Moderately active data Least active data Optimized auto-Tiering Advanced Storage Concepts

22. Per-Tier RAID Configuration • 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 Advanced Storage Concepts

23. Storage Tiers POOL AUTOMATIC DATA OPTIMIZATION Flash (Extremeperformance) SAS (Performance) NL-SAS (Capacity) Advanced Storage Concepts

24. Creating a Heterogeneous Pool Storage > Storage Configuration > Storage Pools Advanced Storage Concepts

25. Configuring a Heterogeneous Pool Advanced Storage Concepts

26. 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 Concepts

27. Managing and Monitoring FAST VP Storage Pool Properties Use the dropdown to display additional options such as Manual Advanced Storage Concepts

28. Managing Auto-Tiering with Unisphere Advanced Storage Concepts

29. 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, whenFAST 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 Advanced Storage Concepts

30. Starting and Stopping Data Relocation Advanced Storage Concepts

31. Unisphere Tiering Summary Advanced Storage Concepts

32. Advanced Storage Concepts Lesson 2: Summary During this lesson the following topics were covered: FAST VP functionality Benefits of FAST VP Configuring a heterogeneous Pool Configuring FAST VP Advanced Storage Concepts

33. Advanced Storage Concepts Lesson 3: FAST Cache During this lesson the following topics are covered: FAST Cache functionality Benefits of using FAST Cache Configuring FAST Cache Advanced Storage Concepts

34. 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 Concepts

35. 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 Concepts

36. VNX FAST Cache Components Host I/O • 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 Multicore Cache (De-stage & Read Miss I/O) Memory Map SSD (Hit) HDD (Miss) Multicore FAST Cache HDD SSD SSD Advanced Storage Concepts

37. 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 Concepts

38. Configuring VNX FAST Cache Advanced Storage Concepts

39. Creating FAST Cache Advanced Storage Concepts

40. Enabling FAST Cache Classic LUN creation Pool creation Pool Properties Classic LUN Properties Advanced Storage Concepts

41. FAST Cache Column: Unisphere Advanced Storage Concepts

42. FAST Cache CLI Commands Advanced Storage Concepts

43. FAST Cache Configuration Options Advanced Storage Concepts

44. 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 Advanced Storage Concepts

45. Advanced Storage Concepts Lesson 3: Summary During this lesson the following topics were covered: FAST Cache functionality Benefits of using FAST Cache Configuring FAST Cache Advanced Storage Concepts

46. 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. Advanced Storage Concepts