- 2. IBM Cloud Scale-out Block Storage Cluster

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OSNEXUS QuantaStor Scale-out iSCSI Block Storage

Key Features QuantaStor’s scale-out block storage configurations provide highly-available iSCSI block storage suitable for a variety of use cases. Each appliance contains SSD to accelerate write performance and each cluster must contain a minimum of 3x appliances. QuantaStor’s web based management interface, REST APIs and QS CLI make storage provisioning and automation easy.

Use Cases Highly-available block storage for virtualization (VMware, Hyper-V, XenServer) Scale-out block storage with Cinder integration for KVM based OpenStack deployments Highly-available block storage for databases

Expandable Add additional drives and/or additional appliances to expand capacity. Drives can be different sizes, appliances can have different numbers of drives but for optimal performance uniform drive count and capacities per QS server/appliance is recommended.

Expected Performance Adding appliances will boost performance as the configuration scales-out. Small 3x appliance configurations will deliver between 400MB/sec and 1.2GB/sec sequential throughput depending on block size and number of concurrent client connections. Erasure-coding is recommended for best write performance and replica mode is recommended for best read performance.

Quick Configuration Steps Storage Management Tab -> Create Grid -> Click OK Storage Management Tab -> Add Grid Node -> Enter 2nd Appliance IP -> Click OK Storage Management Tab -> Add Grid Node -> Enter 3nd Appliance IP -> Click OK Storage Management Tab -> Modify Storage System -> Set Domain Suffix -> Click OK (do this for each appliance) Storage Management Tab -> Controllers & Enclosures -> right-click Controller -> Configure Pass-thru devices -> Select all -> Click OK (do this for each appliance) Scale-out Block & Object Storage Tab -> Ceph Cluster -> Create Ceph Cluster -> Select all appliances -> Click OK Scale-out Block & Object Storage Tab -> Ceph Cluster -> Multi-Create OSDs -> Select SSDs as journals, HDDs as OSDs -> Click OK Scale-out Block & Object Storage Tab -> Storage Pools (Ceph) -> Create Storage Pool -> Select Erasure Coding Mode -> Click OK Cluster Resource Management -> Create Site Cluster -> Select All -> Click OK Cluster Resource Management -> Add Site Interface -> Enter IP address for iSCSI Access -> Click OK Storage Management Tab -> Hosts -> Add Host -> Enter host IQN -> Click OK (do this for each host) Storage Management Tab -> Storage Volumes -> Create Storage Volume -> Enter volume name, select a size, -> Click OK Storage Management Tab -> Hosts -> Right-click Host -> Assign Volumes -> Select volumes -> Click OK

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