How Open Channel SSD Benefit Datacenter and Enterprise Applications

Transcription

1 How Open Channel Benefit atacenter and Enterprise Applications Rick Huang Product Marketing Manager, iliconmotion Inc. 1

2 hared torage ystem App 1 App 2 App 3 torage ervice oftware hared torage Pool 2

3 atacenter and Enterprise torage atacenter (Cloud ervice Provider, CP) Requirements changes rapidly and varies with applications Internal engineering capable for optimization and maintenance Conventional Enterprise (or ME) Prefer an integrated system solution of HW alliance and W Ease purchase and maintenance complexity 3

4 Considerations for ext-gen torage Various kinds of application on the shared devices Required workload specific optimization Quick adoption of new generation A Reduced complexity and efforts for qualification and deployment iversified supply and vendors implified device design and efficient/reliable A enablement 4

5 Open Channel (OC ) OC provides the solution to address the considerations A differentiated architecture host and device Added interface commands leveraging VMe protocol Another approach to optimize storage performance From system level, not only at device hift more data management to host Ease design requirement of device 5

6 OC Roles between Host/evice Application Host ata Placement Open Channel Interface evice/ Media Management ata placement -> near application Host software optimizes data placement Reliability -> near media takes care of media management Expose internal parallelism to host Efficient data placement and IO scheduling Media 6

7 OC ata Path Control Host FTL IO tream #1 IO tream #2 IO tream #3 Manage data streams Control entire data path down to physical IO isolation Predictable latency Physical Blocks 7

8 OC Platform Legacy Usage W Engine User-space File ystem I / O Kernel-space FTL/river FTL/river at Kernel-space Easy adoption as block device mooth transition for legacy usage Open Channel Interface Open Channel 8

9 OC Platform Advanced Usage W Engine User-space File ystem User-space FTL User-space river Open Channel Interface Open Channel FTL/river at user-space FTL as a component of W application Good for maintenance To reduce redundant mapping Combine GC/WL to reduce WA E.g. object storage (KV) 9

10 OC Platform Further Optimization Management W for devices Another FTL on top of block devices Application Management W inside An FTL to manage A devices Block evice Management oftware FTL A A A A A 10

11 evice implified but Flexible evice focus on media management for reliability Ease and simplify some controller requirement CPU / Memory / Power HW/FW design flexible for differentiated customization ifferent OC interfaces Customized FTL partitions between host and device 11

12 evice iversified A Enablement eep knowledge on A characteristics for reliability Intelligent FW algorithm for optimized device BOM cost RAM-less Latest 3 TLC and QLC Efficient and reliable enablement for diversified As tronger ECC, e.g. 4KB LPC Off-line / Online Machine Learning algorithm 12

13 IOP evice Offline/Online ML Error Recovery Practical data collection to build up database A characteristic Offline develop/adjust algorithm with modeling and updated data Online training to optimize with real-time user scenario Increase read performance and improve Qo Performance Comparison Time Unit w/o offline ML with offline ML improve 50% 13

14 evice Approaching Error-Free Bit errors, read disturbance, retention, program failure, evice to record error statistics, and address errors as much as possible Comprehensive error avoidance/recovery schemes The more device to address, the less host to take care 14

15 ummary OC addresses the needs of datacenter and enterprise storage Optimization per application, quick A enablement, diversified supply OC architecture provides the flexibility Host to optimize data placement for IO isolation and latency Combined GC and further optimization for software defined storage evice to deal with media reliability to approach error-free implified and diversified for optimized device BOM cost 15

16 Visit MI Booth #413 ual-mode VMe and OC upports several OC s OC V1.2/V2.0 spec Customized interfaces for A * and B * Project enali pre-standard Enabling latest and coming 3 TLC/QLC 16

17 Thank You