House of Cards. IaaS without storage performance testing. Howard Marks, Deep Storage Len Rosenthal, Load DynamiX

Transcription

1 House of Cards IaaS without storage performance testing Howard Marks, Deep Storage Len Rosenthal, Load DynamiX 1

2 Your NOT So Humble Speaker 25+ years of consulting and writing for trade press Columnist/blogger at NetworkComputing.com Chief Scientist DeepStorage, LLC Independent test lab and on Twitter 2

3 Today s Agenda What do we mean by IaaS? Why IaaS is for the corporate datacenter? The three types of IaaS storage How IaaS makes life difficult for storage The I/O blender and other hypervisor effects Users choose their storage level Noisy neighbors have a lease Which makes storage testing all the more critical 3

4 Infrastructure As A Service? Self service meets virtualization Users create VM from service catalog through web interface CPU, memory, storage capacity, storage class Can be delivered several ways Public (eg: AWS, Microsoft Azure) Private (eg: VMware vcac, Openstack, Cloudstack) Still in your data center for security and privacy 4

5 IaaS Drivers Agility Workload deployment shrinks from days to minutes Workloads billed by the hour Ideal for seasonal, temporary workloads Encourages users to release unneeded resources Can lead to higher utilization Allows IT to compete with public cloud 5

6 Storage = IaaS Magic Scaling the compute side of IaaS is science Just manage the vcpu to core ratio Storage for IaaS is still an art form Storage costs vary over 10X for same capacity Therefore, a large fraction of total costs Storage guy metrics like IOPS alien to users Poor visibility into how applications affect storage Many projects stall on storage performance 6

7 IaaS Storage Types Non-persistent Block storage that s released when VM shutdown Persistent block storage Eg: Amazon EBS, Openstack Cinder Dynamically provisioned, traditional storage Object Storage The cheap stuff eg: Amazon S3 Requires application support or gateway 7

8 Block Storage in Classes Defined in orchestration layer Media SSD, hybrid, spinning disk, Etc. Data protection RAID level, replication, snapshot schedule Hopefully storage QoS Minimum IOPS, IOPS quota Priority Some limited to gold, silver, bronze 8

9 The Cloud s Dark Side Cloud providers have no visibility Into how storage will be used Into the application So APM tools limited value Into future requirements The user/customer buys 200GB of Silver That may be a WORN archive or real time trading database They may make it 2TB overnight They may have needed bronze or plutonium 9

10 Virtualization is Hard on Storage Disk drives like sequential workloads When multiple VMs do sequential I/O they re multiplexed together That throws I/O into a blender all I/O is now random I/O! 5 VMs each needing 100 IOPS might need IOPS when virtualized 10

11 Enter the Noisy Neighbor Pre virtualization storage performance managed by spindles More IOPS, more 15K RPM drives Each app had dedicated spindles In IaaS multiple VMs, from different users, share a volume When marketing re-indexes their database at 2PM others may suffer 11

12 Can t I Just Throw Flash At It? Flash based SSDs do provide lots of IOPS But even all flash arrays have their limits and most of us can t afford them Hybrid solutions are application sensitive How much flash? How to deploy? Storage performance validation with load testing can reveal: How much flash you need How your system will react to new workloads, noisy neighbors Performance limits 12

13 Storage Performance Validation A key to successful IaaS Len Rosenthal VP, Marketing July 24,

14 Who is Load DynamiX? Who we are Mission History Headquarters Products Leader in Storage Performance Validation Putting your storage technologies to the test Provide insight into storage infrastructure behavior to assure performance & optimize cost for public and private clouds Market entry March 2009; Privately-held Santa Clara, CA Software: Load DynamiX Enterprise Hardware: LDX Series load generation appliances 14

15 Storage Performance Validation Go Daddy Case Study Go Daddy Overview World s largest web hosting provider: 5+ million accounts Over 50 million domain names under management 3300 employees; 600+ IT developers, 5 storage admins IT Challenge Determine most cost-effective storage systems to support 31PB growing 30% annually with % uptime across 5 data centers Solution Multiple Load DynamiX 10G Series appliances Go Daddy Benefits Projected storage cost savings of 65% over 2 years Full confidence that their storage systems can support projected workloads Freedom to rapidly innovate with new technologies Load DynamiX is like my smart phone I can t imagine my life without it! Julia Palmer Manager, Performance Engineering Go Daddy 15

16 Attaining IaaS Enlightenment If it ain t broke don t fix it! Test in production and pray Validate with freeware tools (Iometer, etc.) Validate with Evolution of Evolution Storage Performance Validation 16

17 Storage Performance Validation Process In 3 Simple Steps Iterate on different products & configurations Create Model Create storage workload emulations from production data or use our sample workloads. Run Tests Connect storage systems to Load DynamiX load generation appliance and run the tests. Analyze Results Find performance limits. Compare latency, throughput & IOPS of different products and configs. Iterate on different model assumptions, scale Deploy In Production with Confidence 17

18 Go Daddy Production Workload Virtually identical to the one created in Load DynamiX 18

19 Storage Cost Optimization Driving cost optimization through technology validation Existing Vendor Baseline Cost per GB Vendor C 56% drop Vendor B 23% drop OS & Disk Change 56% drop Every transition validated with Load DynamiX Add Compression 35% drop Dedupe/Compression 62% drop Whitebox 67% drop Q1 Q2 Q3 Q4 Q1 Q2 Q3 Q4 19

20 Benefits to Go Daddy by Using Load DynamiX Faster Validation Weeks to test in lab, not 12 months in production Superior Storage ROI Pick most cost effective solution for workload Performance Testing Confidence in user experience Freedom to Innovate Insight for better decisionmaking Storage Engineer Availability Confidence in 5-9 s under load 20

21 Q&A Session Howard Marks DeepStorage.net Len Rosenthal Load DynamiX.com 21