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VMware vSAN
Paul BrarenVMware Systems Engineer / vSAN
Northeastern US / Commercial
pbraren at vmware.com
TinkerTry.com | @paulbraren
VCP-DCV, vExpert 2014/15/16/17
Wethersfield, CT
VMware vSAN
Formerly known as Virtual SAN
Integrated into the kernel, pools disk space from multiple ESXi hosts
Modernization of the Data Center Being Fueled by HCI
Traditional 3-Tiered ArchitectureComplex and Separate Silos
Servers
and Blades
External
Storage
Networking
Hardware
Simplified management
Lower total costs
Greater agility & scale
VirtualizationCompute | Storage | Network
Unified Management
Server + Storage Network
Hyper-Converged Infrastructure
Built on Industry-Standard Servers and Switches
Virtualization
HCI Fills a Growing Market Gap
Flexible Enterprise Storage
HCI Storage
Traditional Storage
Reliable and Fast but complex
Cloud Storage
Simple, Flexible but lacks Enterprise control
SSD
SSD
SSD
SSD
SSD
SSD
Scale Upor
Scale Out
Storage is being Serverized
Enjoy efficient server
economics
Extend server
management to storage
Unlock affordable
server-side flash
Total Storage Market
$10B
$20B
$30B
$40B
$50B
2012 2027
TraditionalStorage
HCI
(Server SAN)
Hyperscale
Source: Wikibon Server SAN Research Project, Aug 2016
Continuing the Blistering Pace of AdoptionFastest Growth Since ESX
vSAN Customer Adoption
Q1'14 Q2'14 Q3'14 Q4'14 Q1'15 Q2'15 Q3'15 Q4'15 Q1'16 Q2'16
400
Companies in Fortune 1000 (US)
109
Countries have vSAN Presence
Industry Verticals use vSAN
100%
200% YoY bookings growth
7,000+ Customers
300,000 on-board sensors send log files
to a Big Data Analytics System running
on VMware vSAN
Analytics accelerate maintenance &
turnaround times
Each extra hour of flying time
yields $25,000 in savings
vSAN Keeps the A380 Flying
VMware vSAN: Radically Simple Storage
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vSphere + vSAN
Resource efficient hyperconverged solution
Commodity x86 servers
Enterprise-level features:
Deduplication and Compression
Erasure Coding (RAID 5/6)
Availability, Scalability and Performance
Scales from 2 to 64 nodes
Policy-based Management
Dynamic application
Applied at the VM level
Overview
Hard disksSSD Hard disksSSD
Hard disksSSD
vSAN Datastore
Storage Designed for Business
vSAN Leverages Next-Generation Hardware
Persistence Tier
vSAN
NVMeSSD NVDIMM
vSAN
NVMe
NVDIMM
vSAN leverages next-gen hardware
Re-Platform to deliver the lowest $/Gig and $/IOPS
Caching Tier
NVMe
All Flash
High performance with consistent latency
Performance Curev
Enabling Next Generation Hardware for vSAN
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NVDIMM
Overview
High Speed NVMe: Use high speed, low latency NVMe for
caching
NVDIMM Phase 1: Byte addressable for storing metadata
NVDIMM Phase 2: Enable storing metadata AND cache
RDMA over Ethernet: To boost n/w transfers
High Density Drives: Support more capacity per host
Benefits
Ride the technology curve to enable faster devices
Enable next-gen NVMe devices to deliver lower $/IOP
Enable storage class memory (NVDIMM) for lowest $/IOP
Reduce network latencies and improve CPU utilization with RDMA
over Ethernet
Enable high density drives for high capacity workloads at the
lowest $/Gig
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vSAN 5.5March 2014
vSAN 6.0March 2015
All Flash
64 Node Cluster
X2 Hybrid Performance
vSAN Snapshots
vSAN Clones
Rack Awareness
vSAN 6.2March 2016
vSAN 6.1September 2015
Stretched Cluster
Replication - 5 Min RPO
Root Cause Analysis
Health Monitoring
Deduplication
Compression
Erasure Coding (RAID 5/6)
Quality of Service
Performance & Capacity Monitoring
Expanded vSAN Ready Nodes
VSA 5.0August 2011
VSA 5.5September 2013
VSA 5.5.2October 2014
VMware Storage:
A history of data integrity, data
availability & data resiliency
vSAN Continued Innovation
ESX 3.02006
ESX 4.02009
ESX 5.02011
ESX 6.02015
vSAN 6.5December 2016
iSCSI Target
2 Node Direct Connect
512e Disk Support
Cloud Automation
vSAN 6.62017
livevirtually.net/2017/01/12/correlating-vsan-versions-with-vsphere-vcenter-esxi-versions
https://livevirtually.net/2017/01/12/correlating-vsan-versions-with-vsphere-vcenter-esxi-versions/
Deduplication and Compression for Space Efficiency
Nearline deduplication and compression per disk group level.
Enabled on a cluster level
Deduplicated when de-staging from cache tier to capacity tier
Fixed block length deduplication (4KB Blocks)
Compression after deduplication
If block is compressed
vSAN and the advantage of integrationWhy integration matters
vSAN and the advantage of Integration
Why kernel integrated HCI is superior
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Consolidate
vSphere vSAN
Managed by vCenter
VM VM VM VM VM VM
Aware of VM I/O from end to end
Kernel integration means that scheduler understands difference of I/O types
Most efficient path leads to minimal resources used to transmit to/from storage system
HCI powered by vSAN
The power of Integration
The hypervisor sits at the most important location in the data center
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vSphere
Managed by vCenter Server
VMware SDDC Ecosystem
Storage
The power of Integration
Kernel level distributed storage brings intelligence and control to the hypervisor
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ControlIntelligence
Managed by vCenter Server
vSphere vSAN
VMware SDDC Ecosystem
The power of Integration - Intelligence
Intelligence What you measure, how you measure it, and where you measure
it at matters
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vSphere
Storage VM(per server)
Ad-hoc HCI
Storage
Storage
Networking
vSphere
Three-tier architecture
Measures
here
Measures
here
The power of Integration - Intelligence
Intelligence vSphere measures the right data, in the right way, at the right
location
Remember that VMware has the unique advantage understanding kernel level metrics like no other solution.
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vSphere vSAN
Managed by vCenter
VM VM VM VM VM VM
Measures
here
HCI powered by vSAN
The advantage of Integration
vSphere with vSAN is the key to transitioning to a full SDDC
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No risk of new solution ecosystem
No risk of new management tool
No risk of new software installation
No risk of proprietary server vendorsvSphere vSAN
Managed by vCenter
Virtual Volumes
CommonPolicy-Based Management
NSXand
SRM
VADP Data ProtectionDell EMC, Veeam, Symantec, etc.
vRealize AutomationvRealize Operations
3rd Party Ecosystem
Demo: Performance Monitoring Built In
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vSAN shows performance from the cluster level down to the VMDK level
https://storagehub.vmware.com/#!/vmware-vsan/vmware-vsan-demonstrations/vsan-6-5-performance-service
Storage Policy-Based Management
The Old Way
Same performance and availability for every VM
Regardless of what is actually needed by each app
Monolithic data protection
Difficult maintenance
Complexity
Zoning, masking
LUN sprawl
VMs across multiple LUNs
Example: Database VM
LUN-02 RAID5
LUN-01 RAID1
Same
Datastore
Storage Policy-Based Management
Policy contains one or more rules
Availability, performance, etc.
Assign policy to VM or virtual disk
Each app gets exactly what is needed
Changes are done dynamically
No downtime, no migration
Manage traditional storage and vSAN
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Availability
Encryption
Performance
vSAN Objects
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VM Home
VM Swap
VMDK
Delta Disk
Memory Delta
Snapshot
VM Home Namespace (VMX, NVRAM, etc.)
VM Swap (virtual memory swap)
Virtual Disk (VMDK)
Snapshot (delta)
Snapshot (delta)
vSAN Objects and Components
Each object has multiple components, define availability and performance
Example: FTT=1, RAID-1 mirroring, Stripes=2
ESXi HostESXi HostESXi Host
Mirror Copy
stripe-2b
stripe-2a
RAID-0
Mirror Copy
stripe-1b
stripe-1a
RAID-0
VMDK Object
RAID-1
Witness
All Flash Only
With FTT=1 availability RAID-5
3+1 Layout (4 host minimum)
Recommend 5 hosts for hot rebuilds
1.33x instead of 2x overhead
20GB disk normally takes 40GB, now just ~27GB
Guaranteed 33% Space Reduction vs Mirroring
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RAID-5
ESXi Host
parity
data
data
data
ESXi Host
data
parity
data
data
ESXi Host
data
data
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