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Monthly Archives: November 2018

Non-Uniform memory NUMA warning

I am getting a non-uniform memory NUMA warning in the event logs from the Hyper-V-Worker if I set memory above 31334MB (a hair less than 32GB).

The hardware is a Dell R510 server with two X5670 six core processors with HT disabled.  There are eight 8GB memory devices installed for a total of 64GB memory.  Hyper-V hardware technology tells me the memory limit is 31334 which seems odd, it’s
not a multiple of 1024.  If I set memory above 31334, Hyper-V hardware technology tells me there are 3 sockets.  These processors are triple channel so I suspect maybe it’s the extra two memory modules but I’m not sure.

The OS is Windows Server Standard 2016 (1607) in core mode with only the Hyper-V feature enabled and nothing else.  There is only one VM running Server 2016 Std (1607).  Updates are latest as of this moment.

I would expect with this hardware, I should be able to utilize 12 cores and 48GB of memory 2 NUMA nodes and 2 sockets for a single VM.  Is there a reason Windows 2016 isn’t detecting the hardware correctly or do I need to loose the extra two 8GB memory
modules or is this actually by design for this particular hardware platform?

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SQL guest backups cause host to freeze

I’m an IT consultant working on multiple systems. We have had this come up on 3 or 4 sites in the last couple years and I’m hoping for a more surgical fix than the one I’ve been using. Scenario common to all of them:

  • WS2012 or 2012R2 Hyper-V host has one or more guests 2012 or 2012R2 guests running SQL. Might be WID, SQL Express, or SQL Server, and various versions of each.
  • Guests are backed up at host level by Arcserve, WSB, or BackupAssist (which uses WSB). We use a lot of Backup Exec, too, but I don’t think we’ve had this problem with BE. BUt as different as Arcserve and WSB are, I’d wager it’s VSS related, not specific
    to any software.
  • Periodically, the host hangs while a guest SQL backup is in progress. While in this state, the guests run as if nothing was wrong, at least for a while. But the host is completely unresponsive.
  • When the problem first manifests, it happens about once a month. Over a period of months, it increases to as often as every 2-3 days.
  • Only recovery is to do an orderly shutdown of guests, and power cycle the host.
  • If there are multiple SQL guests, only 1 guest will be the one that brings down the host.
  • It’s not antivirus exceptions. In fact, it happened first at an ESET site…ESET automatically excludes SQL and most other MS server software.
  • If we back up the guest from the guest level, there’s no issue. In fact, that’s been the workaround at a couple of affected sites.
  • The databases tend to be pretty small…5-20 GB.

Repairing SQL on the guest doesn’t help. SFC /SCANNOW host & guest doesn’t help. Only cure I’ve ever found is migrate to a new guest server. Nothing ever needs to be done to the host.

Since we’ve seen it 4 or 5 times now out of maybe 30 HV sites, we can’t be the only ones! Any ideas? I have one doing this now that would be painful to migrate so I’m hoping for a magic bullet.

TIA

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Creating new hyperV server with raid6.. Any experience with Enterprise Sas SSD drives, such as the Toshiba PX04SVB160?

I’m in the process of building a new hyper-v business server again, this time around i was considering going with raid6 and SAS 12Gb/s SSD storage, rather than Raid10 and 10k rpm sas drives.

In searching for something in the line of 1.6-2TB per drive (giving me around 6-7TB with 6, 1.6TB raid6 units).. i found this Toshiba PX04SVB160 drive: https://serverpartdeals.com/toshiba-…d-state-drive/

Which at $549 seems too good to be true. Most drives i’ve found are in the $1200 and up range (too costly for us).

I’m also concerned if this is the real deal.. if we need to expand the array later it could prove hard to find these at this cost again. I dont see any specs on these drives as far as lifetime writes are concerned either.. if they last 7 years then this is
adequate i’d say.

Anyone have any thoughts/experiences?

Thanks in advance


Tech, the Universe, Everything: http://tech-stew.com Just Plane Crazy http://flight-stew.com

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SAP installation in Hyper – V

Hi,

We are planning to move our SAP servers into "Hyper - V". 

However, we have a limitation that our database(Oracle 11.2.0.1) is not compatible with Hyper - v.

So is it possible that we keep the DB instance outside "Hyper - v" environment and install the app servers inside "Hyper - V" ??

Please also provide any other solutions if available.

Regards,

Yunus

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Problem in Identifying L1 cache in Virtaul Machine

Hi,

I am installing a Virtual Machine on the physical host having(8vCPU) and installing windows server 2012R2 OS.

But as I check under Task Manager—>Performance, the L1 cache is showing N/A.

How I will be able to know the what amount of L1 cache memory my Virtual Machine is using?

Kindly help!!

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Creating a Virtual switch without interfering Physical network

Is there anyway that I can create a virtual switch but without interfering with the physical network?

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Formula for Cluster Host Capacity if One Host is Removed

Hello,

I am a new to the role of Sys Admin for a healthcare provider. Long time helpdesk/IT Support Technician and have several certifications in Windows, ITIL and CompTIA. However, I’ve been in this Sys Admin role now for 8 months or so.

We currently run a production cluster environment with 5 hosts total within the cluster. There are plans to possibly double our current VM servers in anticipation for new version of our record keeping software.

I have been tasked to find out if our current Hyper-V cluster can handle the current load of VMs if one of the 5 host servers were removed. My CIO mentioned the possibility of a formula that could be used to see. Below is the current systeminfo specs for
the 5 host servers:

Host Name:                 HVH01
OS Name:                   Microsoft Windows Server 2012 R2 Datacenter
OS Version:                6.3.9600 N/A Build 9600
OS Manufacturer:           Microsoft Corporation
OS Configuration:          Member Server
OS Build Type:             Multiprocessor Free
Registered Owner:          Windows User
Registered Organization:
Original Install Date:     12/17/2014, 6:42:26 PM
System Boot Time:          11/19/2018, 2:47:01 PM
System Manufacturer:       IBM
System Model:              System x3550 M5                                     
-[5463AC1]-
System Type:               x64-based PC
Processor(s):              2 Processor(s) Installed.
                           [01]: Intel64 Family 6 Model 63 Stepping 2 GenuineIntel ~2600
Mhz
                           [02]: Intel64 Family 6 Model 63 Stepping 2 GenuineIntel ~2600
Mhz
BIOS Version:              IBM -[TBE130J-2.40]-, 4/11/2017
Windows Directory:         C:Windows
System Directory:          C:Windowssystem32
Boot Device:               DeviceHarddiskVolume2
Total Physical Memory:     195,774 MB
Available Physical Memory: 5,369 MB
Virtual Memory: Max Size:  223,422 MB
Virtual Memory: Available: 32,366 MB

Virtual Memory: In Use:    191,056 MB

_______________________________________

Host Name:                 HVH02
OS Name:                   Microsoft Windows Server 2012 R2 Datacenter
OS Version:                6.3.9600 N/A Build 9600
OS Manufacturer:           Microsoft Corporation
OS Configuration:          Member Server
OS Build Type:             Multiprocessor Free
Registered Owner:          Windows User
Registered Organization:
Original Install Date:     12/18/2014, 9:08:01 AM
System Boot Time:          11/19/2018, 3:03:33 PM
System Manufacturer:       IBM
System Model:              System x3550 M5                                     
-[5463AC1]-
System Type:               x64-based PC
Processor(s):              2 Processor(s) Installed.
                           [01]: Intel64 Family 6 Model 63 Stepping 2 GenuineIntel ~2600
Mhz
                           [02]: Intel64 Family 6 Model 63 Stepping 2 GenuineIntel ~2600
Mhz
BIOS Version:              IBM -[TBE130J-2.40]-, 4/11/2017
Windows Directory:         C:Windows
System Directory:          C:Windowssystem32
Boot Device:               DeviceHarddiskVolume2
System Locale:             en-us;English (United States)
Input Locale:              en-us;English (United States)
Total Physical Memory:     195,774 MB
Available Physical Memory: 96,176 MB
Virtual Memory: Max Size:  223,422 MB
Virtual Memory: Available: 123,610 MB

Virtual Memory: In Use:    99,812 MB

_______________________________________

Host Name:                 HVH03
OS Name:                   Microsoft Windows Server 2012 R2 Datacenter
OS Version:                6.3.9600 N/A Build 9600
OS Manufacturer:           Microsoft Corporation
OS Configuration:          Member Server
OS Build Type:             Multiprocessor Free
Registered Owner:          Windows User
Registered Organization:
Original Install Date:     12/18/2014, 9:49:11 AM
System Boot Time:          11/18/2018, 3:47:12 PM
System Manufacturer:       IBM
System Model:              System x3550 M5                                     
-[5463AC1]-
System Type:               x64-based PC
Processor(s):              2 Processor(s) Installed.
                           [01]: Intel64 Family 6 Model 63 Stepping 2 GenuineIntel ~2600
Mhz
                           [02]: Intel64 Family 6 Model 63 Stepping 2 GenuineIntel ~2600
Mhz
BIOS Version:              IBM -[TBE130J-2.40]-, 4/11/2017
Windows Directory:         C:Windows
System Directory:          C:Windowssystem32
Boot Device:               DeviceHarddiskVolume2
System Locale:             en-us;English (United States)
Input Locale:              en-us;English (United States)
Time Zone:                 (UTC-06:00) Central Time (US & Canada)
Total Physical Memory:     195,774 MB
Available Physical Memory: 136,543 MB
Virtual Memory: Max Size:  223,422 MB
Virtual Memory: Available: 164,067 MB

Virtual Memory: In Use:    59,355 MB

_______________________________________

Host Name:                 HVH04
OS Name:                   Microsoft Windows Server 2012 R2 Datacenter
OS Version:                6.3.9600 N/A Build 9600
OS Manufacturer:           Microsoft Corporation
OS Configuration:          Member Server
OS Build Type:             Multiprocessor Free
Registered Owner:          Windows User
Registered Organization:
Original Install Date:     1/2/2015, 12:21:53 PM
System Boot Time:          11/18/2018, 3:46:45 PM
System Manufacturer:       IBM
System Model:              IBM System x3550 M5 -[5463AC1]-
System Type:               x64-based PC
Processor(s):              2 Processor(s) Installed.
                           [01]: Intel64 Family 6 Model 63 Stepping 2 GenuineIntel ~2600
Mhz
                           [02]: Intel64 Family 6 Model 63 Stepping 2 GenuineIntel ~2600
Mhz
BIOS Version:              IBM -[TBE130J-2.40]-, 4/11/2017
Windows Directory:         C:Windows
System Directory:          C:Windowssystem32
Boot Device:               DeviceHarddiskVolume2
System Locale:             en-us;English (United States)
Input Locale:              en-us;English (United States)
Total Physical Memory:     195,774 MB
Available Physical Memory: 24,806 MB
Virtual Memory: Max Size:  223,422 MB
Virtual Memory: Available: 51,933 MB

Virtual Memory: In Use:    171,489 MB

_______________________________________

Host Name:                 PCS-HVH05
OS Name:                   Microsoft Windows Server 2012 R2 Datacenter
OS Version:                6.3.9600 N/A Build 9600
OS Manufacturer:           Microsoft Corporation
OS Configuration:          Member Server
OS Build Type:             Multiprocessor Free
Registered Owner:          Windows User
Registered Organization:
Original Install Date:     2/15/2017, 1:09:57 PM
System Boot Time:          11/18/2018, 3:47:52 PM
System Manufacturer:       LENOVO
System Model:              System x3550 M5: -[8869AC1]-
System Type:               x64-based PC
Processor(s):              2 Processor(s) Installed.
                           [01]: Intel64 Family 6 Model 79 Stepping 1 GenuineIntel ~2600
Mhz
                           [02]: Intel64 Family 6 Model 79 Stepping 1 GenuineIntel ~2600
Mhz
BIOS Version:              LENOVO -[TBE130J-2.40]-, 4/11/2017
Windows Directory:         C:Windows
System Directory:          C:Windowssystem32
Boot Device:               DeviceHarddiskVolume1
System Locale:             en-us;English (United States)
Input Locale:              en-us;English (United States)
Total Physical Memory:     195,774 MB
Available Physical Memory: 109,242 MB
Virtual Memory: Max Size:  223,422 MB
Virtual Memory: Available: 136,190 MB
Virtual Memory: In Use:    87,232 MB

If there are any other details that I am lacking, please let me know and I will follow-up.

Regards,

malo

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Packet loss when ping to gateway from windows 2012 R2 datacenter Server VM

We have 5 VMs running on hyperV gr_inline_cards gr_run_anim Style replaceWithoutSep" data-gr-id="290" id="290">.all vms
as well as host running on windows2012 R2 datacenter.i
Have a strange problem with one of my VM which act as a webserver. packet are dropping when
i ping to Grammar only-ins doubleReplace replaceWithoutSep" data-gr-id="389" id="389">gateway and some other data-gr-id="405" id="405">ips.But gr-alert gr_spell gr_inline_cards gr_run_anim ContextualSpelling ins-del multiReplace" data-gr-id="430" id="430">ther is no any ins-del multiReplace" data-gr-id="471" id="471">probem whe
i ping to some other gr_run_anim ContextualSpelling ins-del multiReplace" data-gr-id="590" id="590">ips from id="607">same network.and other 4 VMs on hyperV running without any issue.

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Packet loss when ping to gateway from windows 2012 R2 datacenter Server

I have 5 Vm on hyperV .all servers are windows 2012 R2 gr-alert gr_spell gr_inline_cards gr_run_anim ContextualSpelling ins-del multiReplace" data-gr-id="5" id="5">dataenter data-gr-id="13" id="13">.Lat few week am facing network issue on a single
vm which is configured as webserver.when gr_spell gr_inline_cards gr_run_anim ContextualSpelling multiReplace" data-gr-id="11" id="11">i ping to gateway data-gr-id="7" id="7">lotes packets are dropping.but when i
tried to ping my workstation its pinging without any packet drop.other 4 VMs working without
any issue

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Add Hyper-v Node to existing cluster

Dear All

I want to add 3 nodes to a existing 3 node cluster with hyper-v on windows server 2012 R2 R2. Storage LUNs are from VNX storage and these new 3 nodes are added to the same zone of existing cluster. I can see same LUNs in the disk management of all 3 new
nodes. old nodes and new nodes have different hardware. Kindly let me know that how to proceed further. Is it possible simply to install clustering feature and then run validation ? or if i run validation with storage, it will bring resources offline on old
nodes ? if then how to proceed futher ?

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