Blast Session Details Test

The BLAST Session protocol allows files on a remote computer to be manipulated - i.e., to be deleted, renamed, or printed on the remote. Owing to the improved remote file management capabilities that Blast offers, VMware now supports the Blast protocol too for user communication with virtual desktops and applications on VMware RDS hosts. Because of this, there is a need to know which users have connected to VMware RDS hosts via Blast and how the experience of each user is. This is why, the Blast Session Details test auto-discovers the users who are connected to VMware RDS hosts via the Blast protocol, and measures the bandwidth usage, frames processing ability, I/O performance, throughput, and time taken to establish each user's session. In the process, bandwidth-hungry, latent sessions can be accurately isolated.

Target of the test : A VMware Horizon View RDS server

Agent deploying the test: An internal agent

Outputs of the test : One set of results for every user who is currently connected to the VMware RDS host via the Blast protocol.

Configurable parameters for the test
Parameters Description

Test period

This indicates how often should the test be executed.

Host

The host for which the test is to be configured.

Port

Refers to the port at which the host listens.

Detailed Diagnosis

To make diagnosis more efficient and accurate, the eG Enterprise embeds an optional detailed diagnostic capability. With this capability, the eG agents can be configured to run detailed, more elaborate tests as and when specific problems are detected. To enable the detailed diagnosis capability of this test for a particular server, choose the On option. To disable the capability, click on the Off option.

The option to selectively enable/disable the detailed diagnosis capability will be available only if the following conditions are fulfilled:

  • The eG manager license should allow the detailed diagnosis capability
  • Both the normal and abnormal frequencies configured for the detailed diagnosis measures should not be 0.
Measurements made by the test
Measurement Description Measurement Unit Interpretation

User sessions

Represents the current number of sessions for a particular user.

Number

A value of 0 indicates that the user is not currently connected to the VMware Horizon View RDS server. You can use the detailed diagnosis of this measure to know which applications are currently run by a user and the resource usage of each application. Resource-hungry applications can thus be identified.

CPU usage of user’s processes

The CPU utilization for a session is the percentage of time that all of the threads/processes of a user session used the processor to execute instructions. If a user is connected via multiple sessions, the value reported is the sum of all CPU utilizations across all the sessions. 

Percent

This value indicates the percentage of CPU resources that are used by applications run by this user. Excessive CPU usage by a user can impact performance for other users. Check the detailed diagnosis to view the offending processes/applications.

Memory usage of user’s processes

This value represents the ratio of the resident set size of the memory utilized by the user to the physical memory of the host system, expressed as a percentage. If a user is connected via multiple sessions, the value reported is the sum of all memory utilizations across all the sessions.

Percent

This value indicates the percentage of memory resources that are used up by a specific user. By comparing this value across users, an administrator can identify the Blast sessions that are engaged in memory-intensive processing on the VMware Horizon View RDS server. Check the detailed diagnosis to view the offending processes/applications.

Input bandwidth

Indicates the average bandwidth used for client to server communications for all the sessions of a user.

KB/Sec

 

Input errors

The average number of input errors of all types for all the sessions of a user. Example: Lost ACK's, badly formed packets, etc. 

Errors/Sec

 

Output bandwidth

Indicates the average bandwidth used for server to client communications for all the sessions of a user.

KB/Sec

 

Output errors

The average number of output errors of all types for all the sessions of a user. Example: Lost ACK's, badly formed packets, etc.

Errors/Sec

 

I/O read rate for user’s processes

Indicates the rate of I/O reads done by all processes being run by a user.

KBps

These metrics measure the collective I/O activity (which includes file, network and device I/O's) generated by all the processes being executed by a user. When viewed along with the system I/O metrics reported by the Disk Activity Test, these measures help you determine the network I/O. Comparison across users helps identify the user who is running the most I/O-intensive processes. Check the detailed diagnosis for the offending processes/applications.    

I/O write rate for user’s processes

Indicates the rate of I/O writes done by all processes being run by a user.

KBps

Faults for user’s processes

Indicates the rate of page faults seen by all processes being run by a user.

Faults/Sec

Page Faults occur in the threads executing in a process.  A page fault occurs when a thread refers to a virtual memory page that is not in its working set in main memory.  If the page is on the standby list and hence already in main memory, or if the page is in use by another process with whom the page is shared, then the page fault will not cause the page to be fetched from disk. Excessive page faults could result in decreased performance. Compare values across users to figure out which user is causing most page faults.

Virtual memory of user’s processes

Indicates the total virtual memory being used by all processes being run by a user.

MB

Comparison across users reveals the user who is being a drain on the virtual memory space.

Handles used by user’s processes

Indicates the total number of handles being currently held by all processes of a user.

Number

A consistent increase in the handle count over a period of time is indicative of malfunctioning of programs. Compare this value across users to see which user is using a lot of handles. Check detailed diagnosis for further information. 

CPU time used by user’s sessions

Indicates the percentage of time, across all processors, this user hogged the CPU.

 

Percent

The CPU usage for user’s processes measure averages out the total CPU usage of a user on the basis of the number of processors. For instance, if your VMware Horizon View RDS server is using an 8-core processor and the total CPU usage of a user across all his/her sessions amounts to 80%, then the value of the CPU usage for user’s processes measure for that user will be 10 % (80/8 processors = 10). This accurately denotes the extent of CPU usage in an environment where load is uniformly balanced across multiple processors. However, in environments where load is not well-balanced, the CPU usage for user’s processes measure may not be an accurate indicator of CPU usage per user. For instance, if a single processor is used nearly 80% of the time by a user, and other 7 processors in the 8-core processor environment are idle, the CPU usage for user’s processes measure will still report CPU usage as 10%. This may cause administrators to miss out on the fact that the user is actually hogging a particular processor! In such environments therefore, its best to use the CPU time used by user’s sessions measure! By reporting the total CPU usage of a user across all his/her sessions and across all the processors the target VMware Horizon View RDS server supports, this measure serves as the true indicator of the level of CPU usage by a user in dynamic environments. For instance, in the example above, the CPU time used by user’s sessions of the user will be 80% (and not 10%, as in the case of the  CPU usage for user’s processes measure). A high value or a consistent increase in the value of this measure is hence serious and demands immediate attention. In such situations, use the detailed diagnosis of the CPU usage for user’s processes measure to know what CPU-intensive activities are being performed by the user.  

Bandwidth

Indicates the bandwidth usage of all sessions of this user.

Kbps

Compare the value of this measure across users to know which user is consuming the maximum bandwidth.

Frame rate

Indicates the rate at which frames are processed during this user's sessions.

Frames/Sec

FPS is how fast your graphics card can output individual frames each second. It is the most time-tested and ideal measure of performance of a GPU. Higher the value of this measure, healthier is the GPU.

Round trip time

Indicates the round trip latency between this user and the server.

Seconds

A high value is indicative of a connection bottleneck.

Throughput

Indicates the network throughput of this user's sessions.

Kbps

A poor network throughput could cause latencies in network communication.

Audio data received

Indicates the bandwidth used while transmitting sound/audio to this user.

Kbps

These measures appear only if the version of the VMware Horizon is 7 and above.

Comparing these values across users will reveal which user is sending/receiving bandwidth-intensive sound/audio files over Blast.

Audio data transmitted

Indicates the bandwidth used while transmitting sound/audio from this user.

Kbps

Client drive redirection data received

Indicates the bandwidth used while receiving client drive redirection (CDR) data to this user.

Kbps

These measures appear only if the version of the VMware Horizon is 7 and above. When the Horizon Client and Horizon Agent are deployed with client drive redirection and the Blast is enabled, folders and files are sent across a virtual channel with encryption. This ensures that the connections between clients and the View Secure Gateway, and the connections from the View Secure Gateway to desktop machines are secure. These measures help administrators to figure out the traffic statistics during the reception/transmission of CDR data.

Comparing these values across users will reveal which user is sending/receiving bandwidth-intensive client drive redirection data over Blast.

Client drive redirection data transmitted

Indicates the bandwidth used while transmitting client drive redirection data from this user.

Kbps

Clipboard data received

Indicates the bandwidth used while receiving clipboard data by this user.

Kbps

These measures appear only if the version of the VMware Horizon is 7 and above. Configuring the clipboard redirection on the client machine enables administrators to control users from redirecting clipboard data to and/or from the virtual desktop and the client machine during the session.

Comparing these values across users will reveal which user is sending/receiving bandwidth-intensive clipboard redirection content during the session.

Clipboard data transmitted

Indicates the bandwidth used while transmitting clipboard data from this user.

Kbps

Data received in HTML5 multimedia redirection

Indicates the bandwidth used while receiving HTML5 multimedia content to this user.

Kbps

These measures appear only if the version of the VMware Horizon is 7 and above.

To redirect HTML5 multimedia content from a remote desktop to the local client system, administrators need to enable the HTML5 Multimedia Redirection feature and install the Chrome browser on the remote desktop. Enabling the HTML5 Multimedia Redirection feature also allows administrators to specify the websites that can use this feature. These measures help administrators to easily find out the bandwidth utilized during each user's session for transmitting and receiving the HTML5 multimedia content to different websites. Comparing these values across users will reveal which user is sending/receiving bandwidth-intensive multimedia files over Blast.

Data transmitted in HTML5 multimedia redirection

Indicates the bandwidth used while transmitting HTML5 multimedia content from this user.

Kbps

Dirty frames rate

Indicates the rate at which the dirty frames are processed during this user's sessions.

Frames/Sec

This measure appears only if the version of the VMware Horizon is 7 and above. The value of this measure should be very low. A high value indicates that the image quality is potentially poor.

Poll rate

Indicates the poll rate for this user's sessions.

Number

This measure appears only if the version of the VMware Horizon is 7 and above.

FBC rate

Indicates the number of image frames processed during this user's session.

Number

This measure appears only if the version of the VMware Horizon is 7 and above.

Frames rate

Indicates the rate at which the image frames are processed during this user's session.

Kbps

This measure appears only if the version of the VMware Horizon is 7 and above. This measure indicates how quickly the image frames are processed during the session. A lower value of this measure indicates that the frames are processed slowly which may lead to processing bottleneck

Imaging data received

Indicates the bandwidth used by this user when receiving imaging data.

Kbps

These measures appear only if the version of the VMware Horizon is 7 and above. Comparing these values across users will reveal which user is sending/receiving bandwidth-intensive images over Blast.

Imaging data transmitted

Indicates the bandwidth used this user when transmitting imaging data.

Kbps

Real-time audio/video data received

Indicates the rate at which the real-time audio/video data was received by this user.

Kbps

These measures appear only if the version of the VMware Horizon is 7 and above.

With the Real-Time Audio-Video feature, webcam and audio devices that are connected locally to the client system are redirected to the remote sessions. This allows the users to run Skype, Webex, Google Hangouts, and other online conferencing applications in their remote sessions. This feature also helps administrators to redirect video and audio data with a significantly lower bandwidth than can be achieved by using USB redirection. Comparing these values across users will reveal which user is sending/receiving bandwidth-intensive real-time audio/video data during the session.

Real-time audio/video data transmitted

Indicates the rate at which the real-time audio/video data was transmitted during this user's sessions.

Kbps

Serial port and scanner data received

Indicates the rate at which the serial port and scanner data was received during this user's sessions.

Kbps

These measures appear only if the version of the VMware Horizon is 7 and above. With the serial port and scanner redirection feature, administrators can easily connect the scanner and phisical COM port devices with the virtual desktops.

Serial port and scanner data transmitted

Indicates the rate at which the serial port and scanner data was transmitted during this user's sessions.

Kbps

Session data received

Indicates the rate at which the data was received during this user's sessions.

Kbps

These measures appear only if the version of the VMware Horizon is 7 and above. Using the values of these measures help administrators to determine the data traffic during the session.

Session data transmitted

Indicates the rate at which the data was transmitted during this user's sessions.

Kbps

Jitter

Indicates the time delay encountered during this user's session.

Seconds

This measure appears only if the version of the VMware Horizon is 7 and above. A value of this measure should be low. A higher value indicates unintended deviation or inconsistency that degrades the quality of audio and video communications.

Round trip time

Indicates the round trip latency between the virtual desktop and this user terminal.

Seconds

This measure appears only if the version of the VMware Horizon is 7 and above. Comparing the value of this measure across users will enable administrators to quickly and accurately identify users who are experiencing higher latency when connecting to a virtual desktop.

Packet loss

Indicates the percentage of packets lost during this user' session.

Percent

This measure appears only if the version of the VMware Horizon is 7 and above. A value of this measure should be very low. A high value for this measure is indicative of a bad network connection between the user terminal and the virtual desktop.

Estimated bandwidth

Indicates the maximum bandwidth that this user can consume during the Blast sessions.

Kbps

This measure appears only if the version of the VMware Horizon is 7 and above.

Data received in Skype for business control

Indicates the bandwidth used when this user received Skype data over the Blast channel.

Kbps

These measures appears only if the version of the VMware Horizon is 7 and above. Comparing the values of these measures across users will reveal which user is sending/receiving bandwidth-intensive Skype data over the Blast channel.

Data transmitted in Skype for business control

Indicates the bandwidth used when this user transmitted Skype data over the Blast channel.

Kbps

Thin-Print data received

Indicates the bandwidth used when this user received Thin-Print data over the Blast channel.

Kbps

These measures appear only if the version of the VMware Horizon is 7 and above. Comparing the values of these measures across users will reveal which user is sending/receiving bandwidth-intensive Thin-Print data over the Blast channel.

Thin-Print data transmitted

Indicates the bandwidth used when this user transmitted Thin-Print data over the Blast channel.

Kbps

USB data received

Indicates the bandwidth used when this user received USB data over the Blast channel.

Kbps

These measures appear only if the version of the VMware Horizon is 7 and above. Comparing the values of these measures across users will reveal which user is sending/receiving bandwidth-intensive USB data over the Blast channel.

USB data transmitted

Indicates the bandwidth used when this user sent USB data over the Blast channel.

Kbps

Windows media MMR data recieved

Indicates the bandwidth used when this user received Windows media MMR data over the Blast channel.

Kbps

These measures appear only if the version of the VMware Horizon is 7 and above. Comparing the values of these measures across users will reveal which user is sending/receiving bandwidth-intensive Windows media MMR data over the Blast channel.

Windows media MMR data transmitted

Indicates the bandwidth used when this user transmitted Windows media MMR data over the Blast channel.

Kbps

The detailed diagnosis of the User sessions, CPU usage of user’s processes, and Memory usage of user’s processes measures lists the processes executed by a user on the VMware Horizon View RDS server, and reports the resource usage of each process (see Figure 1). 

Figure 1 : The detailed diagnosis of the User sessions measure