1. 9/28/2019 8:35 PM
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2. Best practices for implementing Storage Spaces Direct 2019
9/28/2019 8:35 PM
THR3125
Best practices for implementing Storage Spaces Direct 2019
Carsten Rachfahl (Cloud & Datacenter Management MVP)
© Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.

3. 9/28/2019 8:35 PM
Why this session?
I share the most important Best Practices we found in over 100 Storage Spaces Direct Projects over the last 2 years.
And remember: what‘s important in Storage Spaces Direct in Window Server 2016 is also important in Window Server 2019!
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4. #1: RDMA Use RDMA! RoCE iWarp iWarp or RoCE it doesn't matter!
9/28/2019 8:35 PM
#1: RDMA
Use RDMA!
iWarp or RoCE it doesn't matter!
RoCE
Configure RoCE correctly on Host
Configure RoCE correctly on Switch
Don't route RoCE traffic – stay in Switch
iWarp
Don’t route iWarp traffic - stay in Switch
With High Bandwidth Consider PFC
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5. #2: Network Best Practice
9/28/2019 8:35 PM
#2: Network Best Practice
Switch Embedded Teaming with separate NICs
Benefit from new Switch Features (e.g. vRSS, vRDMA, DVMMQ, RSC)
Separate NICs and Subnets for SMB Direct traffic
Clear Network Design
No Congestion at Switch Trunks
Possibility to use separate Switches for RDMA Traffic
East-West Bandwidth matters
Use 25Gbit (or more) instead of 10 Gbit
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6. #3: Resiliency Best Practices
9/28/2019 8:35 PM
#3: Resiliency Best Practices
3way Mirror
If you need speed
Mirror accelerated Parity
Still fast
Good compromise if you need capacity
Great with deduplication
Double Parity
Not recommended instead use mirror accelerated Parity
2way Mirror
Only use in 2 Node Storage Spaces Direct Cluster
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7. #4: Storage Devices Use Flash Devices with enough Endurance
9/28/2019 8:35 PM
#4: Storage Devices
Use Flash Devices with enough Endurance
Cache Device 3 DWPD
Capacity Device 1 – 3 DWPD
Caching Devices
Minimum 2 Caching Devices
Look at 4k Radom IO Numbers
Choose NVMes whenever possible
NVMe are only ~30% more expensive than comparable SSDs
NVMes are easy ~300% faster than comparable SSDs
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8. #5: Sizing Best Practices
9/28/2019 8:35 PM
#5: Sizing Best Practices
Parallel Rebuild
Calculate at least one HDD for Rebuild
Size the different „Storage Tiers“ right
10% Caching Devices (based on the Capacity Devices)
20% Performance Tier (if Mirror accelerated Parity is used)
Use Storage Spaces Direct Calculator for rough estimate
 Link:
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9. #6: Buy WSSD Solutions Buy end-to-end tested OEM Solutions
9/28/2019 8:35 PM
#6: Buy WSSD Solutions
Buy end-to-end tested OEM Solutions
To learn more about WSSD come to my Session tomorrow here at 5:40pm
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10. #7: Manage with Windows Admin Center
9/28/2019 8:35 PM
#7: Manage with Windows Admin Center
Build for Storage Spaces Direct
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11. Please evaluate this session Your feedback is important to us!
9/28/2019 8:35 PM
Please evaluate this session Your feedback is important to us!
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12. 9/28/2019 8:35 PM
© Microsoft Corporation. All rights reserved. MICROSOFT MAKES NO WARRANTIES, EXPRESS, IMPLIED OR STATUTORY, AS TO THE INFORMATION IN THIS PRESENTATION.