The Delphix Engine is a virtual appliance that runs in a hypervisor. In this section, you’ll find requirements to run Delphix on VMware including supported versions and instance configurations as well as recommended configuration parameters for optimal performance.
The Delphix Engine is intensive both from a network and a storage perspective. If the Delphix Engine competes with other virtual machines on the same host for resources it will result in increased latency for all operations. As such, it is crucial that your ESXi host is not over-subscribed, as this eliminates the possibility of a lack of resources for the Delphix Engine. This includes allowing a percentage of CPU resources for the hypervisor itself as it can de-schedule an entire VM if the hypervisor is needed for managing IO or compute resources.
This section has the following topics:
- Supported ESX Versions
- Virtual CPU Count
- SCSI Controller
- General Storage
- Delphix VM Configuration Storage
- Delphix Engine System Disk Storage
- Database Storage
- Additional VMware Configuration Notes
Supported ESX Versions
If a minor release version is listed as supported, then all patch releases applicable to that minor release are certified.
Never allocate all available physical CPUs to virtual machines
128 GB vRAM (recommended)
64GB vRAM (minimum)
Never allocate all the available physical memory to virtual machines.
Memory for the ESX Server to perform hypervisor activities must be set aside before assigning memory to Delphix and other VMs.
|Failure to ensure sufficient memory for the host can result in a hard memory state for all VMs on the host which will result in a block for memory allocations.|
The ova is pre-configured to use one virtual ethernet adapter of type VMXNET 3.
A 10GbE NIC in the ESX Server is recommended.
If the network load in the ESX Server hosting the Delphix engine VM is high, dedicate one or more physical NICs to the Delphix Engine.
LSI Logic Parallel
When adding virtual disks make sure that they are evenly distributing the load across the maximum of 4 virtual SCSI controllers. Spreading the disks across available SCSI controllers evenly will ensure optimal IO performance from the disks. For example, a VM with 4 SCSI controllers and 8 virtual disks should distribute the disks across the controllers as follows:
Note: For load purposes, we generally focus on the DB storage and ignore the controller placement of the system disk.
VMware offers options for disk storage, which include "Independent - Persistent" and "Independent - Non-persistent". The non-persistent setting is catastrophic to the Delphix platform when the VM reboots, thus, Independent - Persistent is required for installation.
Storage used for Delphix must be provisioned from storage that provides data protection.
For example, using RAID levels with data protection features, or equivalent technology.
The Delphix engine product does not protect against data loss originating at the hypervisor or SAN layers.
For more information refer to, Optimal Storage Configuration Parameters for the Delphix Engine.
Delphix Storage Options
There are three types of data that Delphix stores on disk, which are:
- Delphix VM Configuration Storage: stores data related to the configuration of the Delphix VM. VM Configuration Storage includes the VMware ESX configuration data as well as log files.
- Delphix Engine System Disk Storage: stores data related to the Delphix Engine system data, such as the Delphix .ova settings.
- Database Storage: stores data used by Delphix objects such as dSources and virtual databases (VDBs).
Delphix VM Configuration Storage
The Delphix VM configuration should be stored in a VMFS volume (often called a "datastore").
The VMFS volume should have enough available space to hold all ESX configuration and log files associated with the Delphix Engine.
If a memory reservation is not enabled for the Delphix Engine (in violation of memory requirements stated above), then space for a paging area equal to the Delphix Engine's VM memory must be added to the VMFS volume containing the Delphix VM configuration data.
Delphix Engine System Disk Storage
The VMFS volume must be located on shared storage in order to use vMotion and HA features.
The Delphix Engine system disk should be stored in a VMDK.
The Delphix .ova file is configured for a 127GB system drive.
Shared storage is required in order to use vMotion and HA features. In addition to making sure the latest VMware patches have been applied, check with your hardware vendor for updates specific to your hardware configuration. VMDKs (Virtual Machine Disks) or RDMs (Raw Device Mappings) operating in virtual compatibility mode can be used for database storage.
A minimum of 4 VMDKs or RDMs should be allocated for database storage.
If using VMDKs:
The quantity and size of VDMKs or RDMs assigned must be identical across all 4 controllers
The physical LUNs used for VMFS volumes and RDMs should be of the same type in terms of performance characteristics such as latency, RPMs, and RAID level.
The physical LUNs used for VMFS volumes can be thin-provisioned in the storage array.
For best performance, the LUNs used for RDMs should not be thin-provisioned in the storage array but should be thick-provisioned with a size equal to the amount of storage that will be initially allocated to the Delphix Engine. The RDM can be expanded in the future when more storage is needed.
In addition to making sure the latest VMware patches have been applied, check with your hardware vendor for updates specific to your hardware configuration.
Additional VMware Configuration Notes
- Running Delphix inside of vSphere is supported.
- Using vMotion on a Delphix VM is supported.
- Device passthrough is not supported.
Procedure to Install an OVA
Use the Delphix-supplied OVA file to install the Delphix Engine. The OVA file is configured with many of the minimum system requirements. The underlying storage for the install is assumed to be redundant SAN storage.
- Download the OVA file from https://download.delphix.com. You will need a support login from your sales team or a welcome letter.
- Navigate to the Delphix Product Releases/<Current Version>/Appliance Images page.
- Login using the vSphere client to the vSphere server (or vCenter Server) where you want to install the Delphix Engine.
- In the vSphere Client, click File.
- Select Deploy OVA Template.
- Browse to the OVA file.
- Click Next.
- Select a hostname for the Delphix Engine.
This hostname will also be used in configuring the Delphix Engine network.
- Select the data center where the Delphix Engine will be located.
- Select the cluster and the ESX host.
- Select one (1) data store for the Delphix OS. This datastore can be thin-provisioned and must have enough free space to accommodate the 300GB comprising the Delphix operating system.
- Select four (4) or more data stores for Database Storage for the Delphix Engine. The Delphix Engine will stripe all of the Database Storage across these VMDKs, so for optimal I/O performance, each VMDK must be equal in size and be configured Thick Provisioned - Eager Zeroed. Additionally, these VMDKs should be distributed as evenly as possible across all four SCSI I/O controllers.
- Select the virtual network you want to use.
If using multiple physical NICs for link aggregation, you must use vSphere NIC teaming. Do not add multiple virtual NICs to the Delphix Engine itself. The Delphix Engine should use a single virtual network. For more information, see Optimal Network Architecture for the Delphix Engine.
- Click Finish.
The installation will begin and the Delphix Engine will be created in the location you specified.
- Once the installation has completed, power on the Delphix Engine and proceed with the initial system configuration as described in Setting Up Network Access to the Delphix Engine.