Teradata is a distributed database system and performance is better when the database system data drives are spread across multiple RAID-1 drive pairs. Each vNode/TPA instance requires 3 vdisks/datastores. If deploying a 4 vNode/TPA, a total of 24 internal drives are configured as RAID-1 pairs, resulting in 12 LUNs. Each one has a single datastore created using the entire LUN size. When the vNode/TPA instances are deployed, a single Teradata Database pdisk is created inside each datastore utilizing all of the datastore space.
The bundle of scripts help you configure the internal RAID storage to Teradata specifications. A second script is provided so you can create the datastores for each ESXi host if needed. The scripts that Teradata provides have been tested on Dell R720xd, R730xd and HP Gen9 pNodes. If you do not have these pNode types, the following are the Dell-specific RAID settings. It is your responsibility to ensure the settings are correct as vendors use different setting names.
|Setting Name||Recommended Setting|
|Read Policy||No Read Ahead|
|Write Policy||Write Back|
|Disk Cache Policy||Disabled|
|Stripe Element Size||64 KB|