Hi,

I encounter below when installing FOG (Version: 1.5.9) into ubuntu 18.04. I try using browser to browse google, youtube is working fine at the server.

The installation is completed but when i browse FOG Login Screen it having below error.

May i know how to troubleshoot on this?

Thank You

I have found the problem which i missing out of the below segment connecting my drive. After adding below script it is working fine.

Currently i find the disk “/dev/sda5” during my partclone deploy screen and paste into above code.

osdiskpart="/dev/sda5";
mkdir /ntfs 2>/dev/null
mount "${osdiskpart}" /ntfs 2>/tmp/mntfail

This raise another question on “/dev/sda5” where can i get the osdiskpart based on the images so that i do not need to hardcode into my post deploy script?

Hi

Below are my post install script. Im trying to change the hostname for ubuntu desktop image but it is not taking effect. I’m using virtual box to trying out my script. May i know which part of my script having problem?

. /usr/share/fog/lib/funcs.sh
#########################################################
# Functions
#########################################################
FUNC_DOTS() {
    max=65
    if [ -n "$1" ]; then
		n=`expr $max - ${#1}`
		echo -n " * ${1:0:max}"
		if [ "$n" -gt 0 ]; then
			for i in $(seq $n); do
				printf %s .
			done
		fi
	fi
}

#########################################################
# Update hostname file
#########################################################
FUNC_DOTS "Updating /etc/hostname"
echo $hostname
echo $hostname >/etc/hostname
echo "Done"

Hi @george1421

Thanks for informative reply it helps to explain my doubt on

• VB/TFTP client are not suitable for perform benchmark
• Fog client mass communication might cause FOG server performance bottleneck
• Recommended ESXi or dedicated hyper-v server to perform benchmark (I am exploring these methods)

but I still have some question based on your reply

For point 2 & 5 I would summarized as :

• heavy lifting is done by the target computer not the FOG server
• During imaging the FOG server only moves images from disk to the network (capture/deployment process)
• FOG use zstd for image compression (much faster on image expansion )

Question:
My image at FOG Web UI showing 6.14 GB, in FOG server image folder is about 1.7 GB

• Q1: Can I understand that the image is compressed by zstd from 6.14 GB to 1.7 GB stored in server storage node?

• Q2: For image deployment what is the process being carry out from below option : (please let me know if there is option C)

  • A: move 1.7 GB to network > download to client (1.7 GB) > decompress 1.7 GB to 6.14 GB
  • B: decompress 1.7 GB to 6.14 GB > move 6.14 GB to network > download to client ( 6.14 GB)

• Q3: If Q2 is (A) can we assume that the "zstd " application will be download to client machine to perform the compression/decompression?

For point 4. as you mention

• speed on the partclone screen is a composite speed
• partclone speed (GB/min) is the throughput of the entire process not just network throughput

Question: Below image are getting from fog DB > tasks table

• Q1: Do you mean by 24.25 GB/min is the composite speed from partclone?
• Q2: What exactly is taskTimeElapsed when the duration start to capture?
• Q3: What is the different on taskTimeElapsed compare to the start and end time at “imagingLog” table? (we just guessing start and end time is the total duration of the task and taskTimeElapsed is part of it.)

For point 6. as you mention

• “seeing as a bottleneck on the larger campus is FOG server performance servicing computers with the FOG Client installed”

Question
We do plan to install FOG Client into our Linux machine for the purpose of renaming the host name based on static name configure at FOG WebUI after post deployment.

• Q1: Is there a way to preform host rename after our image deployment without FOG Client installed?

Thank You
WT

Hi,

I’m using FOG version 1.5.9. Image capturing, unicast, multi cast are working fine. The images is Linux based.

Goal: To perform stress test to know the number of clients FOG Server can support simultaneously with a tolerable duration (less than 10 min).
Challenges: Having limited number of clients(3). Would like to stress test the capabilities on 300 clients

Experiment & Benchmark:
Actual Clients

• able benchmark on 1-3 clients only
• using Gigabit CT Desktop Adapter PCIe NIC
  • 1 client 6.14 gb image unicast takes around 19 sec from fogdb.tasks.taskTimeElapsed(block size 4096)
    • Speed = 6140 MB / 19 sec = 323.16 MBps * 8 = 2585.28 Mbps
  • 3 client 6.14 gb image unicast takes around 39 sec from fogdb.tasks.taskTimeElapsed(block size 4096)
    • Speed = 6140 MB / 19 sec = 157.44 MBps * 8 = 1259.52 Mbps

Virtual Box

• benchmark using 3 VM at single machine

  • 1 client 6.14 gb image unicast takes around 34 sec from fogdb.tasks.taskTimeElapsed(block size 4096)
    • Speed = 6140 MB / 34 sec = 180.59 MBps * 8 = 1444.72 Mbps
  • 3 client 6.14 gb image unicast takes around 57 sec from fogdb.tasks.taskTimeElapsed(block size 4096)
    • Speed = 6140 MB / 57 sec = 107.72 MBps * 8 = 861.76 Mbps

  Compare to Actual Client:
  1 Client : actual client is 1.79 time faster than vm client
  3 Client : actual client is 1.46 time faster than vm client
  Therefore unable to use VB to make the stress test

TFTP Client

• we are using “https://www.tftp-server.com/tftp-client.html” try to download images from tftp server

• we use .bat file to trigger the download in parallel

  • 1 client 4.73 gb image with block size 65465 -> 101 sec
    • Speed = 4730 MB / 101 sec = 46.83 MBps * 8 = 374.64 Mbps
  • 3 client 4.73 gb image with block size 65465 -> 273 sec
    • Speed = 4730 MB / 273 sec = 17.33 MBps * 8 = 138.64 Mbps

  Compare to Actual Client:
  1 Client : actual client is 6.90 time faster than tftp client
  3 Client : actual client is 9.09 time faster than tftp client
  Unable to use TFTP Client to make the stress test

Question

1. We are using “Gigabit CT Desktop Adapter PCIe NIC” on actual client. The data rate of the port is “1000 Mbps”. Based on our benchmark the unicast for 1 client and 3 client is “2585.28 Mbps” & “1259.52 Mbps” this is much faster than the PCIe NIC capabilities. May i know how and why FOG able to achieve this?
2. If we compare TFTP Client vs Actual Clients, the speed is much faster using FOG even the block size at FOG is much smaller than TFTP Client. May I know what is the architecture behind in FOG that enable it to download much faster?
   (we do use the single linux client with similar NIC & network to get file 4.73 gb from TFTP it takes 1469 sec [3.22 MBps/25.75 Mbps]. This is far more slower. We are using the default block size)
3. May I know what tools/method can perform stress test on unicast & multicast to know the best number of client the FOG server can support simultaneously

Thank You
WT