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Virtualization with VMWare Infrastructure 3.0

New Blog at VCP5.wordpress.com

Posted by Preetam on January 1, 2012

Hi friends, thanks for visiting the site, I’m not blogging on this site anymore, instead I’ve started my new blogs at VCP5.wordpress.com.

Click on image below it will take you there.



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Visit Http://vcp4.wordpress.com for Recent updates

Posted by Preetam on November 19, 2009

Visit Http://vcp4.wordpress.com for Recent updates

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InTeresting Vsphere posts

Posted by Preetam on September 23, 2009




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How to find Queue depth of HBA ?

Posted by Preetam on April 30, 2009

Here is way

How to find queue depth for HBA ?

[root@pz-vmware07 scripts]# tail /etc/vmware/esx.conf
/vmkmodule[0003]/enabled = “true”
/vmkmodule[0003]/module = “tg3.o”
/vmkmodule[0003]/type = “nic”
/vmkmodule[0004]/enabled = “true”
/vmkmodule[0004]/module = “cciss.o”
/vmkmodule[0004]/type = “scsi”
/vmkmodule[0005]/enabled = “true”
/vmkmodule[0005]/module = “lpfcdd_732.o”
/vmkmodule[0005]/options = “lpfc0_lun_queue_depth=16 lpfc1_lun_queue_depth=16 lpfc_tgt_queue_depth=31”
/vmkmodule[0005]/type = “fc”



[root@pz-vmware07 scripts]# esxcfg-module -l
Device Driver Modules
Module Type Enabled Loaded
vmkapimod vmkapimod true true
vmklinux linux true true
bnx2 nic true true
tg3 nic true true
cciss scsi true true
lpfcdd_732 fc true true
[root@ci-vmware07 scripts]# esxcfg-module -g lpfcdd_732
lpfcdd_732 enabled = 1 options = ‘lpfc0_lun_queue_depth=16 lpfc1_lun_queue_depth=16 lpfc_tgt_queue_depth=31’

Posted in Advance Concepts, How to, Storage, VMWare | Leave a Comment »

vi3 Full Book is available for Download

Posted by Preetam on April 30, 2009

Best design guide ever available and that too free of cost. Go and download it here.

VMware Infrastructure 3: Advanced Technical Design Guide Downloads

Thank you to Ron,Mike and Scott.

Posted in How to, VMWare | Leave a Comment »

while reading blades

Posted by Preetam on October 9, 2008

Internetwork Operating System stands for IOS

Downlink ports are connected to blade network cards using the enclosure’s shared backplane. Uplink ports connect the switch module to external network switches.

The following network interconnect modules are available for the HP c-Class BladeSystem

· HP 1/10Gb Virtual Connect Ethernet Module for c-Class BladeSystem

· Cisco Catalyst Blade Switch 3020 for HP c-Class BladeSystem

· HP GbE2c Ethernet Blade Switch for c-Class BladeSystem

HP supports the following FC switch models

· HP 4Gb Virtual Connect Fiber Channel Module for c-Class BladeSystem

· Cisco MDS 9124e Fabric Switch for HP c-Class BladeSystem

· Brocade 4Gb SAN Switch for HP c-Class BladeSystem

This web-based management suite (HP Insight control) includes:


· iLO 2

· Onboard Administrator

· HP ProLiant Essentials Rapid Deployment Pack; Server Migration Packs for P2P, P2V, V2V (Virtual to Virtual), and V2P; and many other management packs

The 10U HP BladeSystem c-Class enclosure can support up to 16 HP server blades versus the 9U IBM Blade Center H enclosure, which supports up to 14 IBM server blades. In server systems, a U is a standard unit of measure, equal to 1.75 inches, for vertical usable space or height of racks and cabinets. A 20U rack, for example, has 20 rack spaces in 35 inches of vertical space.

To find the BL equivalent of a ProLiant DL series server, just add "100" to the model number. For example, a ProLiant BL460 blade server is the equivalent of a ProLiant DL360 rack-mounted server.

For example, 16 x 1U servers with redundant power require 24 power supplies and 24 power cables. An HP BladeSystem c-Class enclosure with 16 server blades requires only six power supplies and six power cables. Blade systems use fewer fans. For example, 16 x 1U servers with redundant fans require approximately 144 fans. An HP BladeSystem c-Class enclosure with 16 server blades requires only 10 fans. Fewer fans equates to less power consumed.

If you have an existing network or FC infrastructure, you may want to have an unmanaged direct connection between each server blade and an external network or FC switch. Ethernet and FC pass-thru modules provide the unmanaged direct connections. Pass-thru modules don’t provide any cable consolidation between the enclosure and the external switch or SAN and are not as popular as network and FC interconnect modules. Consider using pass-thru modules only if you already have a significant, underutilized investment in network or FC switches.

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VMWare Some Links Quick Reference

Posted by Preetam on September 26, 2008

VMWare Educational service



VMWare technical Papers


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How to check which is your Primary node in HA ?

Posted by Preetam on September 22, 2008

[root@my-vmware01 root]# cat /opt/LGTOaam512/log/aam_config_util_listnodes.log
KEY: -z VAL: 1
KEY: domain VAL: vmware
KEY: cmd VAL: listnodes
CMD: hostname -s

CMD: /opt/LGTOaam512/bin/ft_gethostbyname my-vmware01 |grep FAILED

CMD: /opt/LGTOaam512/bin/ftcli -domain vmware -connect my-vmware02 -port 8042 -timeout 60 -cmd listnodes
        Node              Type              State
———————–  ————    ————–
  my-vmware01            Primary      Agent Running
  my-vmware02            Primary      Agent Running

Total time for script to complete:  0 minute(s) and 1 second(s)

Courtesy: Yellow Bricks

Posted in Advance Concepts, How to, Logs, VMWare | Leave a Comment »

VMware launches VI Ops portal

Posted by Preetam on September 14, 2008

Amazing site (http://viops.vmware.com/home/index.jspa) is launched by VMWare. And great stuff is over here. Proven practices. I like the concept and i can assure it is going to help us all. Just have a look Blades vs. traditional Rack servers. Meaningful discussion is going on here. And many more.

Found a good blog there http://virtuallycrazy.blogspot.com/ 

Good Redbook http://www.redbooks.ibm.com/abstracts/redp3953.html

And again good stuff here http://perspectives.mvdirona.com/2008/09/11/WhyBladeServersArentTheAnswerToAllQu estions.aspx

What else ? Thanks to VMWare again !!

Posted in Advance Concepts, Tips, VMWare | Leave a Comment »

What are Thin Disks,Thick Disks

Posted by Preetam on September 13, 2008

Excellent explanation of various storage technologies, especially Thin disks from vmmba.

 There are three main technologies that can accomplish storage oversubscription:

  1. Linked clones
    • This feature is available in VMware Lab Manager and VMware Workstation at the virtual disk level.  When a linked clone is used, the new VM uses pointers to the original VM for all common data.
    • The additional advantage of linked clones is that whitespace is not stored – for example if an empty data disk is part of a clone operation, the new disk will act as a "thin" disk and only consume the storage that it really requires for data
    • Linked clones can also be accomplished at the datastore level using technologies such as NetApp FlexClone (useful when cloning many VMs at once)
    • Keep in mind: linked clones pay a performance penalty on write operations (using copy-on-write), and put added stress on the source disks on read operations
  2. Thin Disks
    • Thin-provisioned disks are virtual disks that "appear" to the VM as one size, but only consume up to the amount of data that is required by that disk.  So, a 10 GB drive that is 50% utilized will only store 5 GB on disk (a traditional "thick" virtual disk would consume the entire 10 GB on disk)
    • Thin disks are options in VMware Workstation, and are the default disk type when using NFS storage in VMware ESX Server – however, VMs cloned from templates are always thick
    • Storage vendors such as Hitachi and NetApp have LUN-level thin provisioning, but that would only apply to VMware if using RDMs
  3. Deduplication
    • Deduplication is a technology similar to memory page sharing (above), where common data is stored only once.  It is done "after the fact" (ex poste), meaning de-duplication opportunities are scanned using a background process
    • Deduplication is primarily used for backups (e.g. Symantec PureDisk, EMC Avamar, or Quantum DXi-Series), but can also be used on the filesystem itself (today, using NetApp Deduplication, formerly A-SIS)

REFERENCE: www.vmmba.com

Posted in Advance Concepts, Storage, VM Provisioning, VMFS, VMWare | 1 Comment »