Storage Fault Tolerance in Hyper-Converged Clouds running Red Hat OpenStack Platform. Asmita Jagtap Senior Principal Software Engineer 2 nd May 2017

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1 Fault Tolerance in Hyper-Converged Clouds running Red Hat OpenStack Platform Asmita Jagtap Senior Principal Software Engineer 2 nd May 2017

2 Fault Tolerance High Availability of Application Data Directly impacts Business Continuity Outages are expensive! Tier-1 workloads - the most demanding apps and that need protection

3 OpenStack Hyper-converged Environment

4 Faults in hyper-converged environments Hypervisor Hypervisor Hypervisor Hypervisor Nova Compute Nodes Network switch Host OS Host OS Cinder Nodes Host OS/hardware failure Network failure media failure dead connectivity loss

5 Fault Tolerance Mechanisms Need extra storage for full copy of data No impact to I/O performance Zero RPO Mirroring & Striping Need extra storage for erasure codes Some impact to I/O performance Zero RPO Erasure Coding Need extra storage for snapshot data Indirect impact to I/O performance RPO up to last snapshot/backup Snapshots & Backups

Veritas TM for OpenStack Full Image Delta Delta Compute

delta change Optimized for random IOs Set IO policies for

Network switch Data Nodes (Secondary) Periodic sync Backup

recovery Rapid provisioning Off-hosting Running s not

6 Veritas TM for OpenStack Full Image Delta Delta Compute Nodes (Primary) Compute Plane Running s 1 Full copy of + delta change Optimized for random IOs Set IO policies for performance Introducing Data Plane! Network switch Data Nodes (Secondary) Periodic sync Backup Data Plane Point-in-Time copies of s Real time fault recovery Rapid provisioning Off-hosting Running s not impacted by Backup operations Optimized for sequential IOs Periodic delta changes synced to the Data Node

7 Fault handling in Veritas Full Image Delta Delta Compute Nodes (Primary) Network switch Periodic sync Hardware Failure on compute: Redirect I/Os to reflection target ownership failover Restore reflection factor Live migrate Data Nodes (Secondary) Backup

8 Fault handling in Veritas Full Image Delta Delta Compute Nodes (Primary) Network switch Periodic sync Service Failure on compute: Redirect I/Os to reflection target ownership failover Service restart ownership failback Data Nodes (Secondary) Backup

9 Fault handling in Veritas Full Image Delta Delta Compute Nodes (Primary) Network switch Periodic sync Data Nodes (Secondary) Compute Host OS/hardware failure: Auto-evacuate all s Restore reflection factor Backup

10 Fault handling in Veritas Full Image Delta Delta Compute Nodes (Primary) Network switch Periodic sync Data Nodes (Secondary) Failure or Host OS/hardware on datanode: No impact to s on compute Data node failover Restore DN reflection factor Backup

11 Fault handling in Veritas Full Image Delta Delta Compute Nodes (Primary) Network switch Periodic sync failed on datanode: No impact to s on compute Data node failover Service restart Data node resync Data Nodes (Secondary) Backup

12 Fault handling in Veritas Full Image Delta Delta Compute Nodes (Primary) Network switch Periodic sync Data Nodes (Secondary) Network failure: No impact to s on compute Data node s unavailable Restore network Re-enable data node Backup

13 Fault handling in Veritas Full Image Delta Delta Fault Tolerance summary: Compute Nodes (Primary) Network switch Periodic sync For hot data, at compute plane 1 Full copy and reflected delta writes Space optimized usage of SSD tier Data Nodes (Secondary) For warm data, at data plane 1 Full copy and incremental snapshots Inexpensive commodity tier Backup For cold data, at external backup server Scheduled periodic backups No impact to primary compute

14 VeritasTM for OpenStack Software-defined storage designed for OpenStack Backup

15 Veritas Value Props Simplified Management GUI Predictable I/O Performance Compute and Scalability No noisy neighbours! resiliency for all data tiers Integrated Zero Window Backups

16 Fault Tolerance for Red Hat OSP in action!

17 THANK YOU plus.google.com/+redhat facebook.com/redhatinc linkedin.com/company/red-hat twitter.com/redhatnews youtube.com/user/redhatvideos

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