VDP by default has one internal proxy with a throughput of 8 (ie- The internal proxy can run upto max 8 concurrent backups and restores). The throughput of a proxy is configurable (1 to 8) in VDP configure page.
VDP also provides an option to deploy upto 8 external proxies. An external proxy is a light-weight appliance with the following benefits:
- Run more concurrent backups with external proxies
- Perform hot-add backups where VDP appliance do not have access to the protected VMs storage
- FLR on EXT4 based file systems
Note – Once an external proxy is configured, the internal proxy is automatically disabled
To take full advantage of external proxies, deploy them to the hosts that have access to protected VMs storage. The throughput of each external proxy is also 8.
Though from math, (Max external proxies (8) * Throughput of each external proxy (8) = 64) but VDP supports only 24 concurrent backups for various reasons.
Examples:
- For 2 external proxies, set the throughput to 6 >>> 12 concurrent backups
- For 4 external proxies, set the throughput to 5 >>> 20 concurrent backups
- For 8 external proxies, set the throughput to 3 >>> 24 concurrent backups
However the performance recommendations vary for Level 0 & Level 1 backups.
- Level 0 backups – Increase throughput/proxy than the number of proxies
- Level 1 backups – Increase proxies over throughput
Refer VDP Admin guide-Proxies section for complete details.
Deploying an External Proxy
Invoke VDP Configure page – https://<IP_address_VDP_Appliance>:8543/vdp-configure/ and login into the appliance
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