By default, on services startup, PRTG tries to detect all available network adapters on the system running a probe (this includes, for example, the PRTG core server).
On few systems, this might lead to an exception so that the probe cannot fully connect to the core server. In this case, please try to disable the initial detection of available network cards.
Caution: Please backup your system before manipulating the Windows registry!
Step 1
On the system running the PRTG core server, open the registry editor.
For a 64-Bit Windows system, go toHKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Paessler\PRTG Network Monitor\Probe\
For a 32-Bit Windows system, go toHKEY_LOCAL_MACHINE\SOFTWARE\Paessler\PRTG Network Monitor\Probe\
Note: For PRTG 8 you might see the values in the additional sub-key V7 or V8.
Step 2
Add a new DWORD value with the name NoMacScan.
Set this to 1 to disable the initial search for network adapters.
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Is Shared hosting secure and safe?
Is shared hosting a good option for an ecommerce site? A small seller and new WHT member wants to know what type of hosting to use on a budget.
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How do hosting companies respond toPayPal when customers look for chargeback? That’s the question in this WHT thread, still hot from last week.
Virtual Machine in XenServer Will Not Shut Down or Start; Stuck/Frozen Starting/Stopping
If you’ve worked with XenServer for any length of time, you have no doubt experienced having a VM turn “orange” or “amber” or otherwise become unmanageable. Here are couple of similar problem scenarios and solutions that might help.
Problem Scenario #1:
You notice that a VM has numerous lifecycle events on a XenServer. It has continuously attempted to shutdown, but remains in the green/on state. The VM will not display a console, or POST information. Manual shutdowns in XenCenter do not work (Shutdown or Force Shutdown).
Solution:
You may have success trying some of these ideas, or it may take a combination of these to obtain control of the stuck VM.
Start by trying an ‘xe-toolstack-restart’ on the pool master server. This is the easiest fix, and will work a majority of the time. You will lose connection to your pool momentarily. If this doesn't work, go onto the next steps listed below.
If this is a XenDesktop hosted VM, put the VM in maintenance mode, if you cannot force a Start/Shutdown from the DDC
From the XenServer console, try the following command to force a shutdown: ‘xe vm-shutdown –force vm=VMNAME’. If VM does not shutdown with this command, proceed to next step
In XenCenter, once the above two items are done, attempt to "Reboot" the VM. It may restart now.
Related Issue:
I experienced a similar issue where all members were down in a XenServer pool, but the pool Master remained up and functional. The 'toolstack' processes were not running on pool members. An ‘xe-toolstack-restart’ was required on each pool member XenServer before the server would appear functional and participate in the XenServer Pool.
Problem Scenario #2:
This is the most common scenario you will see. A virtual machine will go into an “amber” or “orange” state and you are unable to shutdown, reboot, or even forcefully reset the VM.
Solution:
Find the UUID of the hung VM. You can do this via the command line with ‘xe vm-list’ or via XenCenter.
Find the Domain ID of the hung VM. Run ‘list_domains’ from the command line, and match the UUID with the ID number
id | uuid | state 0 | 2fe455fe-3185-4abc-bff6-a3e9a04680b0 | R 47 | 267227f3-a59e-dafe-b183-82210cf51ec4 | B 59 | 298817fb-8a3e-7501-11e0-045a8aa860ff | B 60 | 46e3d5aa-2f02-dfdc-b053-9a8ac56ec5d1 | B 61 | 16cf3204-eb17-5a12-e8d0-c72087bda690 | B 62 | 1f9053b5-c6ca-40bb-504e-3017c37e7281 | H 63 | ddaec491-097a-e271-362b-f2f985e26e4a | R 65 | 55f3b225-4f65-d1ea-aa19-add44c5acce7 | B 66 | 7adef6fd-9171-5426-b333-6fb1b57b8e60 | B H 67 | 6046dc13-f70b-8398-56fb-069c22440a7c | B 68 | f201cd94-a501-00c2-d21e-8c2f03ea167b | B H
Run destroy_domain on the Domain ID.
# /opt/xensource/debug/destroy_domain -domid 62
The VM will still show itself as running, so now, we need to reboot it.
# xe vm-reboot name-label='name of the VM' –force
The VM is now rebooted, and you can bring it up as if you had just pulled the plug. That is, check for some disk corruption, etc.
Vodafone Foundation and The Garvan Institute of Medical Research have launched, as part of a three-year partnership, the DreamLab smartphone app in an aim to help fast track cancer research.
Designed by B2Cloud, DreamLab -- initially available for download on Android with plans already underway for launch on iOS -- has been built to transform any smartphone into a supercomputer, Vodafone has claimed.
When a smartphone is plugged in and is fully charged, the DreamLab app automatically downloads a small part of the genetic sequencing profiles that the Garvan Institute stores on Amazon Web Services' locally hosted cloud. The information is then processed, and the results are sent back to Garvan researchers, which they can use as part of their research.
Within the free app, users are able to choose which cancer research they wish to support -- breast, ovarian, prostate, and pancreatic -- before selecting how much mobile data they want to use per month, starting at 50 megabytes. Vodafone has committed to waiving fees for the data on behalf of its five million prepaid and postpaid customers.
The launch of the app comes after two years in the making, which also included the trial of a desktop version.
Vodafone Australia CEO Inaki Berroeta told ZDNet the company is always looking at new ways of how it can best use its existing network.
"When we heard about the challenges that the Garvan Institute were having when it came to buying computing power to do all this data-intensive research, that's when we thought about what if we connected millions of smartphones that are idle at night, and we create this supercomputer.
"We could have [used computers] but given the millions of smartphones that are connected to our network, there is much more computing power than any computer. Also, you can see nowadays a smartphone has a computing power that is almost equivalent to a PC."
Andrew Giles, CEO of The Garvan Institute of Medical Research, explained that the initial goal will be to see 100,000 smartphone users power up the DreamLab app, which is expected to help crunch data 3,000 times faster than the current rate, and help address the institute's largest challenge.
"Crunching numbers is our biggest challenge at the moment -- so this will speed up unbelievably. The more we get, the quicker we'll go because there is so much data. The full human genome is an amazing file by itself, but at the moment we focus on things we know ... but there are other genes we're not allocating time to yet, but this means people can do that while it's sleeping," he said.
DreamLab app will turn any smartphone into a supercomputer. (Image: Supplied)
According to John Mattick, executive director of The Garvan Institute of Medical Research, the institute is currently generating between one to two petabytes of data per year.
"[This is] just coming from the machines before we get to analysis. The data on individual genos has to be matched by data from their medical data in order to make sense of their genetic sequencing," he said.
"The future of medical research, the future of healthcare is going to be about the use of data, and initially we have to understand this data and the differences in the genetic profile ... and we need enormous processing power."
Giles added that the institute expects to make additional savings, given that this program will mean it won't need to purchase a supercomputer.
"It's more about what we won't have to spend. We've been doing some forward planning [based on] our budget; our IT bills are huge, our storage bills are huge, so if this really gets off it could be tens of thousands [of dollars], or hundreds of thousands if things go really well. We're owned by the University of New South Wales, so obviously we're part of that but it's still expensive," he said.
In addition, Vodafone announced that it will commit AU$400,000 over three years to The Garvan Institute of Medical Research to further help with cancer research.
During its half-year results for 2015, Vodafone continued to record a net loss of AU$183.6 million, up 13.3 percent from the AU$158.6 million loss in the same period last year.
Vodafone Australia's James Marsh at the time attributed the company's loss to acquisition costs, the offer of cheaper international calling and data options for customers, a higher debt due to a number of its liabilities being held in unhedged US dollars, and increased competition.
"We have seen a step up in competition across both the mobile network operators and the MVNOs, particularly in prepaid," he said.
"Our seasonal decline, though, has been at its lowest levels for many years, and we're in a good position for growth in H2.
"We see that [customer base] growing going forward.
