Capacity Considerations

Parallels conducted in-house Parallels RAS scalability testing using a total of two HP DL360 consisting of the following hardware components:

Component	Description
CPU	2x Xeon E5-2670 v1, 2.6GHz, 20 MB L3, 115W TDP
RAM	128 GB, 16x 8 GB Micron DDR-4-2100 at 1600MHz
HDD	Western Digital Blue 1 TB SSD

The following Parallels RAS lab environment was used:

• A farm consists of 1 site.

• Single hop DMZ.

• Each Secure Gateway can host 1200 sessions in Gateway SSL mode (enumeration and proxying RDP session in SSL + User Portal).

• Each Secure Gateway has User Portal enabled and balanced by HALB using the same port 443 (When using URL https://HALB-VIP/userportal/ the incoming connections will be distributed appropriately because SSL session persistence is in a place).

Note: To enable SSL and User Portal, a server certificate must be installed.

250 users

Parallels RAS was deployed on VMware vSphere 6.5 on Windows 2016 Server as follows:

Parallels RAS Component	Total VMs	vCPU in Each VM	RAM in Each VM
RAS Connection Broker	2	2	4 GB
RAS Secure Gateway	2	2	4 GB
High Availability Load Balancing	2	1	2 GB
RD Session Host	6	6	24 GB

• All components doubled for redundancy.

• RDSH N+1 for redundancy.

The above configuration has been tested with both our internal tools and Login VSI. For more details, you could read the Parallels RAS Scalability Testing with Login VSI paper, which is available at the following URL: https://download.parallels.com/ras/v18/docs/en_US/Parallels-RAS-Scalability-Testing-Login-VSI.pdf

500 users

Parallels RAS was deployed on VMware vSphere 6.5 on Windows 2016 Server as follows:

Parallels RAS Component	Total VMs	vCPU in Each VM	RAM in Each VM
RAS Connection Broker	2	2	4 GB
RAS Secure Gateway	2	2	4 GB
High Availability Load Balancing	2	1	2 GB
RD Session Host	12	6	24 GB

• All components doubled for redundancy.

• RDSH N+2 for redundancy.

1000 users

Parallels RAS Component	Total VMs	vCPU in Each VM	RAM in Each VM
RAS Connection Broker	2	2	4 GB
RAS Secure Gateway	2	2	4 GB
High Availability Load Balancing	2	1	2 GB
RD Session Host	24	6	24 GB

• All components doubled for redundancy.

• RDSH N+4 for redundancy.