SHIFT-WIKI - Sjoerd Hooft's InFormation Technology
This WIKI is my personal documentation blog. Please enjoy it and feel free to reach out through blue sky if you have a question, remark, improvement or observation. See below for the latest additions, or use the search or tags to browse for content.
ALUA for ESXi 5.1 and NetApp Storage
Summary: A post about alua on VMware ESXi and NetApp.
Date: Around 2019
Refactor: 2 January 2025: Checked links and formatting.
Allowed Downtime - Up to Five 9s
Summary: What would be your uptime - or downtime - for how many 9s.
Date: 20 February 2025
| Required Availability | Required Uptime hours/year | Allowable Downtime /year |
|---|---|---|
| 90% (0.9) | 7889.4 | 36.525 days |
| 99% (0.99) | 8678.34 | 3.6525 days |
| 99.9% (0.999) | 8757.23 | 8.766 hours |
| 99.99% (0.9999) | 8765.12 | 52.596 minutes |
| 99.999% (0.99999) | 8765.91 | 5.2596 minutes |
This wiki has been made possible by:
SRM: Add Hardware To Your DR Network
Summary: How to add a computer to your Disaster Recovery Network after a SRM failover test.
Date: Around 2017
Refactor: 20 February 2025: Checked links and formatting.
In case you do a test you might need some workstations in your testnetwork. This is how you do that, and note that all files should be located on the vCenter on your recoverysite. In this howto the scripts are located on the G-Drive.
The goal is simple, depending on if you're doing a test or a recovery, only one PC of a complete testroom should be added to the correct network. In this example we use these VLANs:
- Production network: 1
- Test network: 112
- Recovery network: 911