OnApp Storage Home

Technical aspects and overall architecture of the OnApp Storage system:

Features

OnApp Storage is designed for cloud workloads. It provides high performance, resilience, and cost benefits in comparison to open-source SANs. Hardware Independe …

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Integrated Storage Architecture

OnApp Storage is a distributed SAN for cloud providers that allows you to turn your existing cloud infrastructure into a scalable, resilient, and efficient stor …

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Integrated Storage Nodes

OnApp storage nodes are self-managing, self-discovering, and self-contained hot-pluggable units. Each storage node manages its own content in the most efficient …

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Integrated Storage Data Stores

Integrated storage data store functionality allows combining physical disks from compute resources into a virtual data store to create a distributed block based …

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Integrated Storage Data Store Disks

Disks are partitions of an integrated storage data store that can be allocated to specific virtual servers. OnApp Storage disks are managed through the Control …

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Integrated Storage Drive Devices

Drive devices are physical hard drives that can be assigned to compute resources tied to the integrated storage data stores and used as storage nodes. When the …

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Diagnostics

The diagnostics feature allows you to check the status of each integrated storage API endpoint and resolve these issues via the OnApp user interface. The main d …

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Compute Resources

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Expected Behaviour During Degraded Service

This table illustrates compute resource behaviours during crash or degraded service.     Can utilise a Backup Server VMOps Start Stop Hot Migrate Restart Resize …

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Integrated Storage Common Scenarios

Deprecated documentation - for the latest update refer to Upgrade Guide for Cloud with CloudBooted Servers https://docs.onapp.com/display/UPGRADE/.Upgrade+Guide …

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Customizable CloudBoot Images

OnApp CloudBoot compute resources allow you to add custom drivers. This feature is needed when hardware is not supported by the kernel version used by OnApp. If …

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Integrated Storage Auto Healing

OnApp introduces auto healing -  an auto-scheduling option to repair degraded vDisks. This functionality can be used only in case there are no serious issues wi …

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Performance Benchmarks

Performance benchmarks are used for measuring the integrated data store performance by running tests against it.  Performance benchmarks are only available for …

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SSD Caching

SSD caching increases disk I/O performance. It uses NVMe or Solid State Disks (SSDs) to cache frequently used data. There are two basic cache modes of operation …

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Epochs for Data Stores

Epochs is a mechanism to decrease VDisk repair time. It works by periodically flushing  (e.g. every 4 hours) a changed block bitmap of an online VDisk on the ba …

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Kernel Crash Dumping Mechanism on KVM Compute Resources

Kdump is a kernel crash dumping mechanism designed for saving the system's memory contents for later analysis. It is especially helpful for the purposes of debu …

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Command-Line Interface

The command-line interface is a collection of command-line utilities that you can use to manage your OnApp storage without UI. We do not recommend you to use CL …

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Integrated Storage Networking

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