IBM System Storage DS8870 Release R7.3 Performance Update

Transcription

1 IBM System Storage DS8870 Release R7.3 Performance Update Enterprise Storage Performance Yan Xu

2 Agenda Summary of DS8870 Hardware Changes I/O Performance of High Performance Flash Enclosure (HPFE) Easy Tier with HPFE Copy Services with HPFE New drives 200GB/800GB SSDs Disk Magic Support 2

3 R7.3 Hardware Changes 3

4 R7.3 Hardware Changes High Performance Flash Enclosure (HPFE) (performance and efficiency) New enclosure that houses new high-performance flash adapters and Flash Cards 1U storage enclosure. Contains up to GB Flash Cards (1.8 form factor) Supported Configurations All-Flash HPFE system consists of only an A rack with up to 8 HPFEs. Increased number of I/O bays (eight) Flash Accelerator will be enabled by default for 16-core and p7+ configuration Hybrid supports up to 4 HPFEs in A rack besides the normal support for HDDs and/or SSDs. Only support for RAID5 in R7.3 4

5 Performance Benchmarks OLTP Database Simulation Benchmarks Simulates IO done by OLTP applications. Similar to SPC-1. Do a mix of random reads and writes with cache hits and cache misses. DBO(Database Open): 70% read/30% write, 4KB IO s, 50% cache hit DB zos(database System Z): 75% read/25% write, 4KB IO s, 72% cache hit Sequential IO Large block sequential reads or writes to the storage server s drives. Similar to SPC-2. Corner benchmarks Perform just one type of IO pattern. Most applications combine a mix of different IO patterns. Cache Hits: 4KB random reads or writes to the storage server s cache. Cache Read Misses: 4KB random reads to the storage server s drives. Writes Miss: 4KB random writes to the storage server s drives. All results are from a DS8870 p7+, 16-core unless otherwise noted 5

6 HPFE I/O Performance 6

7 HPFE vs SSD Single Array Single Array RAID5 (6+p) 4KB Random Sequential KIO/s X faster 1.8X faster GB/s Read Write 0 Read Write SSD HPFE SSD HPFE 7

8 HPFE vs SSD Single Array 4KB Random Read Single Array, RAID5 (6+p) Response Time (ms) I/O Rate (KIOPS) SSD HPFE 8

9 HPFE vs SSD 4 Arrays Single HPFE/Single Device Adapter Pair 4 Arrays RAID5 4KB Random Sequential KIO/s X faster 4X faster GB/s Read SSD HPFE Write 0 Read SSD HPFE Write 9

10 Response Time (ms) IBM Systems & Technology Group HPFE vs SSDs - DBO(70/30/50) Single HPFE provides 3.2X IOPs improvement for OLTP (Database Open) workload DBO workload: 70% reads/30% writes with 50% read cache hits K IOps 1 HPFE 1 DA Pair w/ 32 SSDs 10

11 Response Time (ms) IBM Systems & Technology Group HPFE vs HDDs - DBO(70/30/50) Four HPFE can achieve OLTP (DBO) IOPs provided by 1536 HDDs, with much better response time. DBO workload: 70% reads/30% writes with 50% read cache hits K IOps 4 HPFEs 1536x 15K HDDs RAID10 11

12 Hybrid DS8870: HDD/HPFE Note: Data allocation to HPFE was done manually 12

13 Hybrid DS8870: HDD/HPFE Note: Data allocation to HPFE was done manually 13

14 Easy Tier with HPFE 14

15 Easy Tier: 15KRPM with SSDs or HPFE Workload DB2 Brokerage Transactional Workload Configuration DS8870, 256GB Cache, 8-core GB 15K drives RAID GB SSDs RAID-5 or GB HPFE Flash Cards RAID-5 DB2 9.7 FP1, 4 Instances, 4 x 2 TB DBs, 4 Buffer Pools at 54 GB each 15

16 Easy Tier: 15KRPM with SSDs or HPFE DB2 Brokerage Transactional Workload DB2 Brokerage Transactional Workload DB2 Overall Transaction Rate per Second K RPM HDDs 2.8X 15K RPM HDDs/SSDs, with EasyTier 3.5X 1.2X 15K RPM HDDs/HPFE, with EasyTier 16

17 Easy Tier: 15KRPM with SSDs or HPFE DB2 Brokerage Transactional Workload DB2 response time (ms) of key trade activities Market Analysis Customer Position Lookup Trade Trade Order Trade Status Trade Update Trade Results Overall RT 15K RPM HDDs K RPM HDDS/HPFE, with Easy Tier Reduction (%) 68% 25% 75% 27% 44% 71% 28% 71% 17

18 Easy Tier: 15KRPM with SSDs or HPFE DB2 Brokerage Transactional Workload DS Average Throughput/Response Time Throughput (IOPs) Volume Response Time (ms) 0 15K RPM HDDs 15K RPM HDDs/SSDs, with EasyTier 15K RPM HDDs/HPFE, with EasyTier 0 Throughput Volume Response time 18

19 Easy Tier: 15KRPM with SSDs or HPFE Workload OLTP Workload with 40% read, 60% write Configuration DS8870, 256GB Cache, 8-core GB 15K drives RAID GB SSDs RAID-5 or GB HPFE Flash Cards RAID-5 19

20 Easy Tier: 15KRPM with SSDs or HPFE OLTP Workload 10.0 OLTP Response Time (ms) RT 7X vs HDD only 1.7X vs RT I/O Rate (KIOPS) GB/15K(RAID-5) GB/15K(RAID-5) GB SSDs(RAID-5), with Easy Tier GB/15K(RAID-5) GB HPFE Flash Cards(RAID-5), with Easy Tier 20

21 Easy Tier: intra-tier auto-rebalance SSDs and HPFE Workload OLTP Workload with 40% read, 60% write Configuration DS8870, 256GB Cache, 8-core GB SSDs RAID GB HPFE Flash Cards RAID-5 21

22 Easy Tier: intra-tier auto-rebalance SSDs and HPFE 22

23 Easy Tier: intra-tier auto-rebalance SSDs and HPFE 10.0 OLTP Response Time (ms) > 40% I/O Rate (KIOPS) GB HPFE Flash Cards, GB SSDs, RAID-5, initially skewed GB HPFE Flash Cards, GB SSDs, RAID-5, after auto-rebalance 23

24 Copy Services with HPFE 24

25 Flashcopy Background Copy (without IO) The Flashcopy background copy rate for DS8870 with HPFE showed near linear scaling from 1 DA Pair (1HPFE) to 8 DA Pair (8 HPFE) configurations, with +70% improvement comparing to DS8870 with HDDs Background Copy GB/s DA-Pair 2 DA-Pairs 4 DA-Pairs 8 DA-Pairs DS8870 w/hpfe DS8870 w/hdd 25 HPFE: High Performance Flash Enclosure

26 Throughput (KIOPs) IBM Systems & Technology Group Flashcopy with No-copy option: Database Open Workload The Database Open (DBO) workload at equivalent throughput with both configurations. The DS8870 with HPFE provides higher throughput and much lower response time (red text) with either normal Flashcopy or Space Efficient Flashcopy. DS8870 P7 with HDDs: 8-DA Pair, K HDDs, RAID5 DS8870 P7+ with HPFEs: 8-HPFEs, 240 HPFE Flash Cards, RAID DBO Response time 0.3 ms 0.3 ms 0.3 ms 3.5 ms 13.2 ms ms No FlashCopy Standard FlashCopy Space Efficient FlashCopy DS Bluehawks Throughput DS DA Pairs Throughput 26

27 New Drives 27

28 New Drives Supported 200GB 2.5 SAS SSD 800GB 2.5 SAS SSD 28

29 Open 200GB & 800GB 2.5 SAS SSD Performance The 200GB and 800GB 2.5 SAS SSDs on the DS8870 have equivalent performance to the 400GB 2.5 SAS SSDs. Single Rank RAID-5 6+p Random Sequential KIO/s MB/s KB Random Read 4KB Random Write 0 Sequential Read Sequential Write 200GB SSDs 800GB SSDs 400GB SSDs 200GB SSDs 800GB SSDs 400GB SSDs 29

30 Open 200GB & 800GB 2.5 SAS SSD Performance The rebuild rate of the 200GB and 800GB 2.5 SAS SSDs on the DS8870 is equal or better than the 400GB 2.5 SAS SSDs. Rebuild Rate, Single Rank (RAID-5 6+p) 200 Rebuild Rate (MB/s) No Workload Moderate Workload Heavy Workload 200GB SSDs 800GB SSDs 400GB SSDs 30

31 Disk Magic Support 31

32 Disk Magic Support for R7.3 Support for HPFE Support for new 200GB/800GB 2.5 SSDs Delivery Version was released on June 6 th Note: Consult your IBM representatives and/or IBM Business partners for Disk Magic Capacity studies for your environment. 32

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34 Thank You 34