vCPU:pCPU ratio

From official doc VMware:

      the following vCPU:pCPU ratios can be considered a good starting point for a design:

o1:1 to 3:1 is not typically an issue

oWith 3:1 to 5:1, you might begin to see performance degradation

o6:1 or greater is often going to cause a significant problem for VM performance

I have found this script in VMware Community Site:

Foreach($esx in Get-VMHost){

    $vCPU = Get-VM -Location $esx | Measure-Object -Property NumCpu -Sum | select -ExpandProperty Sum

    $esx | Select Name,@{N='pCPU';E={$_.NumCpu}},

        @{N='vCPU';E={$vCPU}},

        @{N='Ratio';E={[math]::Round($vCPU/$_.NumCpu,1)}}

}

Output is:

Name            pCPU vCPU Ratio

----            ---- ---- -----

phesx01.pre.lab   16   26   1.6

PowerCli show Schedule Task on vCenter

(Get-View ScheduledTaskManager).ScheduledTask | %{(Get-View $_).Info} | Select Name,NextRunTime

Iscsi 10Gb and performance

Fast Ethernet is 100Mb/s throughput

12 MB/s speed (theorhetical)

Gig Ethernet is 1000Mb/s throughput

125 MB/s speed (theorhetical)

10 Gig Ethernet is 10,000Mb/s throughput

1250 MB/s speed (theorhetical)

Pratically on  ISCSI 10 Gig the throughput is 300-500 MBps it is very good.

After change vcenter hostname and ip error to access TsmVMwareUI

After change vcenter hostname and ip    when  i try to access a TSM Vmware Gui Web interface:

 

On the machine where the “Tivoli Data Protection for VMware” package is installed, open the Windows Services applet and stop the service: 

Open the file vmcliConfiguration  with notepad  (find the file in my case  on c:\IBM\tsm\tdpvmware\webserver\usr\servers\veProfile\tsmVmGUI) and change the name of old vcenter with the new vcenter

<vcenter_url>https://xxxx.xxx.xx/sdk</vcenter_url>

Now restart the service  "Data Protection for Vmware web Server service" and retry to connect at web interface

Creating a PowerHA v7.1.3 html cluster report

Last summer i have needed to configure 3 cluster PowerHa 7.1.3.3.

After configuration i found this command to generate a HTML report whit all information.



clmgr view report cluster file=/tmp/xxxx.html type=html company_name="My Company"

Backup configuration MDS Cisco Switch FC

I use tftp server.
Use command line, connect with ssh client to MDS switch. In this case MDS9124.


MDS-TAPE-3S-01# copy running-config tftp:
Enter destination filename: [MDS-TAPE-3S-01-running-config]
Enter hostname for the tftp server: 10.55.0.33
Trying to connect to tftp server......
Connection to server Established. Copying Started.....
|
TFTP put operation was successful
Copy complete, now saving to disk (please wait)...
MDS-TAPE-3S-01#

Clone vm without vcenter

For clone disk and clone vm without vcenter :

cd /vmfs/volumes/Datastore01Raid10
 /vmfs/volumes/537dfea4-903a2d25-a8c3-00237da1046c # ls
SRVAPP01      SRVDC02       win2008R2ent

/vmfs/volumes/537dfea4-903a2d25-a8c3-00237da1046c # mkdir template2008
vmfs/volumes/537dfea4-903a2d25-a8c3-00237da1046c # vmkfstools -i SRVDC02/SRVDC02.vmdk template2008/template2008.vmdk
Destination disk format: VMFS zeroedthick
Cloning disk 'SRVDC02/SRVDC02.vmdk'...
Clone: 100% done.
/vmfs/volumes/537dfea4-903a2d25-a8c3-00237da1046c #










And select custom configuration for add existing disk 


and after select other option for the disk "Use an existing virtual disk"



and select the vmdk create .