Eric Burgener VP, Product Management A New Approach to Storage in Virtual Environments March 2012

Agenda  Storage I/O in virtual environments  Implications  Industry responses  The storage hypervisor March 20122

VM ❶ Poor performance Very random, write-intensive workload Spinning disks generate fewer IOPS Storage provisioning trade-offs Virtual Machines ❷ Poor capacity utilization Over-provisioning to ensure performance Performance trade-offs ❸ Complex management Requires storage expertise Imposes SLA limitations Limits granularity of storage operations The VM I/O Blender Hidden Storage Costs of Virtualization 3 March 2012

VM ❶ Poor performance Very random, write-intensive workload Spinning disks generate fewer IOPS Storage provisioning trade-offs Virtual Machines ❷ Poor capacity utilization Over-provisioning to ensure performance Performance trade-offs ❸ Complex management Requires storage expertise Imposes SLA limitations Limits granularity of storage operations The VM I/O Blender Hidden Storage Costs of Virtualization Can decrease storage performance by 30% - 50% 4 March 2012

VDI Environments Are Even Worse March  Windows desktops expect dedicated local disk  Even more write-intensive due to many more VMs/host  Much wider variability between peak and avg IOPS  Boot, login, application, logout storms  Add’l storage provisioning, capacity consumption issues VIRTUAL DESKTOPS

Yet Another “Virtual” Storage Conundrum March Thick/Fixed Disks Fully provisioned Thin/Dynamic Disks Thin provisioned Linked Clones/Differencing Disks Writable clones HIGH PERFORMANCE Poor space utilization SPACE-EFFICIENT Poor performance RAPID PROVISIONING Poor performance The virtual administrator’s choice: pick just one

Industry Responses  Adding spindles adds IOPS  Tends to waste storage capacity  Drives up energy, backup costs March BUY MORE STORAGE  Really speeds up reads  Does not necessarily speed up random writes  Expensive and precludes any “HA” support HOST SSD CARDS  Add higher performance drives (if available)  Upgrade to a higher performance array  Increased storage complexity BUY FASTER STORAGE

Storage Challenge Implications  Storage has to be significantly over- provisioned March  Performance vs provisioning times vs space efficiency vs cost  Storage costs can unexpectedly be 30% - 50% higher Will I run out of storage budget before I finish?

The Storage Hypervisor Concept March  Server hypervisors increase server resource utilization and virtualize server resources  Increases resource utilization and improves flexibility  Storage hypervisors increase storage utilization and virtualize storage resources  Increases storage utilization and improves flexibility SERVER HYPERVISOR STORAGE HYPERVISOR … Performance, capacity and management implications

Introduction of a Dedicated Write Log Per Host 10 Tier 1 Tier n Tiered Storage Optimized asynchronous de-staging  Log turns random writes into a sequential stream  Storage devices can perform up to 10x faster  De-staging allows data to be laid out for optimum read performance  Minimizes fragmentation issues  Requires no add’l hardware to achieve large performance gains  The more write intensive, the better the speed up  Excellent recovery model for shared storage environments Dedicated write log Optimized Writes Acknowledgements … HYPERVISOR Optimized Reads HOST March 2012

Log De-Couples High Latency Storage Operations 11 … HYPERVISOR HOSTS Shared Storage Write Logs Storage Pool THIN PROVISIONING ZERO IMPACT SNAPSHOTS HI PERFORMANCE CLONES INSTANT PROVISIONING March 2012 THESE OPERATIONS NO LONGER IMPACT VM PERFORMANCE

The Virsto Storage Hypervisor 12 Fundamentally changes the way hypervisors handle storage I/O Improves performance of existing storage by up to 10x Thin provisions ALL storage with NO performance degradation Reduces storage capacity consumption by up to 90% Enables almost instant provision- ing of high performance storage Reduces storage provisioning times by up to 99% Allows VM-centric storage manage- ment on top of block-based storage Enables safe provisioning and de- provisioning of VMs by anyone March 2012

How Virsto Works (1) 13 Tier 1 Tier n Virsto vSpace Virsto vLog Virtual Desktop Virtual Desktop Virtual Desktop Virtual Desktop … Virsto Virtual Storage Layer Hypervisor HOST Optimized Reads Optimized de-staging  vLog provides very high write performance ALL the time  Sequentializes writes to speed up spinning disk or SSD 1 2  Data asynchronously de-staged to vSpace  vSpace shared across all hosts (SAN)  Almost all reads handled from vSpace 3  Splits reads and writes across different spindles  Improves the performance of both Optimized Writes Acknowledgements March 2012

How Virsto Works (2) 14 Tier 1 Tier n Virsto vSpace Virsto vLog Virtual Server Virtual Server Virtual Server Virtual Server … Virsto Virtual Storage Layer Hypervisor Host Optimized Reads Optimized de-staging  High latency operations can be done with NO performance impact  Regular provisioning, thin provisioning  Snapshot/clone creation/usage, backup 4  All storage is “cluster-aware” with no performance impact  Supports HA failover, live migration, etc. 5 6  Pure software solution that does not REQUIRE more hardware for performance  But speeds that up too if you buy it Optimized Writes Acknowledgements March 2012

What Virsto Does For SSD: Log vs Cache March  SSDs perform better  Sequential vs random write performance  Logs are much more efficient use of SSD capacity  Virsto vLogs are 10GB in size  Caches a % of primary storage capacity  Logs speed up EVERY write ALL the time  Can lock shared data into tier 0 SSD for read performance  Speeds up ALL reads ALL the time … Primary Storage (Virsto vSpace) Log (Virsto vLog) Shared Storage SSD placement options Tier 0 Physical Host Physical Host

Integrated Virsto Management  Uses standard hypervisor workflows  VMware, Hyper-V  Transparently uses Virsto storage  Higher performance, faster provisioning, lower capacity consumption  Rapid Deployment Utilities For VMware View, Citrix XenDesktop VDI environments March

Proof Points in vSphere Environments: SDSU March Baseline EnvironmentPerformance with Virsto 341 IOPS Native VMDKs 3318 IOPS Virsto vDisks 10X more IOPS 20% lower latency 9x CPU cycle reduction Virsto for vSphere December 2011 Results

Proof Points in VDI Environments: MS EEC March With Virsto, Hyper-V supports over 2x times the number of VDI sessions, assuming the same storage configuration Virsto for Hyper-V June 2011 Results

Demonstrated Customer Value March

Virsto Solutions 20  Pure software based solution  High performance, space-efficiency, rapid provisioning, cluster-awareness – ALL AT ONCE with your existing storage  Provides better utilization of spinning disk and/or SSD  Works with any heterogeneous block-based storage