Vcap dca section 1


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Vcap dca section 1

  1. 1. VCAP-DCA Section 1<br />Implement and Manage Storage<br />Sean Crookston<br /><br /><br />
  2. 2. Configure vCenter Server Storage Filters<br />What is the Pluggable Storage Architecture <br />Changing a multipath policy <br />Software iSCSI Port Binding(Multipathing) <br />Open Forum<br />
  3. 3. The VCAP-DCA Exam<br />40 live lab questions<br />Tasks for each lab can be a scoring opportunity<br />Some have more weight then others<br />Passing score tbd based on beta<br />Approx 4 hours<br />Should receive results within two weeks<br />Will remain based on 4.0 until next major release, i.e. 4.5, 5.0<br />
  4. 4. The VCAP-DCA Exam<br />Lab Environment<br />All PDF documentation for related products will be available on the desktop.<br />Scoring is based on checking configurations and characteristics of items after you have completed them.<br />Some items may be dependent on earlier items to work.<br />Doesn’t matter how you get it done.<br />
  5. 5. Resources<br /><br /><br /><br />
  6. 6. Configure vCenter Server Storage Filters<br />Done through the Gui<br />AdministrationvCenter Server SettingsAdvanced Settings<br />
  7. 7. Configure vCenter Server Storage Filters<br />Config.vpxd.filter.vmfsFilter<br /> When set to false, allowed to add a VMFS volume to a VM even when in use by another VM.<br />Config.vpxd.filter.rdmfilter<br /> When set to false, allowed to add a LUN as and RDM even when in use by another VM.<br />Config.vpxd.filter.SameHostandTransportsFilter<br />When set to false, incompatible luns are allowed to be added as extents.<br />Config.vpxd.filter.hostRescanFilter<br />When set to false, the auto rescan for all hosts is disabled after adding storage.<br />
  8. 8. Configure vCenter Server Storage Filters<br />Live DEMO<br />
  9. 9. What is the Pluggable Storage Architecture<br /><br />NMP Plugin is the default VMware Native Multipathing Plug-In. It is responsible for managing the sub-plugins which are included by VMware or provided by 3rd parties. <br />The first type of which is the SATP, or Storage Array Type Plug-In. <br />Responsible for Array specific functions<br />Can be 3rd party or provided by VMware<br />The second type is the PSP or Path Selection Plug-In.<br />Chooses path for I/O Requests<br />Default assigned based on SATP, which can be overridden.<br />Additionally 3rd party MPPs or Multipathing Plug-Ins can be used, such as EMC PowerPath. This is used in leiu of the NMP.<br />Mask_PATHPlugin is loaded to mask paths, effectively preventing a host from accessing storage devices/LUNs or from specific paths to such.<br />
  10. 10. Changing a multipath policy <br />Can be done by Gui or Command Line<br />Fixed, Fixed_AP, MRU, RR<br />From the command line<br />Esxcli –server ip/host nmp device setpolicy –device naa.iiiiiiiiiiiii -psp VMW_PSP_MRU<br />
  11. 11. Changing a multipath policy <br />Fixed<br />Uses designated preferred path if configured, otherwise uses for discovered working path at boot. <br />When it can’t be used a random alternative path is used.<br />Preferred path is automatically reverted to when it comes back.<br />
  12. 12. Changing a multipath policy <br />Fixed_AP<br />Extends fixed functionality to active/passive and ALUA mode arrays. <br />When not specified, path will be selected by Array path preference & Current Path State.<br />
  13. 13. Changing a multipath policy <br />MRU <br />Uses first working path discovered at boot<br />Switches to alternative path and will continue using this path even if original path comes back online.<br />
  14. 14. Changing a multipath policy <br />RR<br />Automatic path selection that enables load balancing across paths. <br />Only uses active paths and use case is on Active/Active arrays. <br />Not supported in MSCS environments<br />
  15. 15. Changing a multipath policy <br />Live Demo<br />Esxcli –server ip/host nmp device list<br />Esxcli –server ip/host nmp device setpolicy –device naa.iiiiiiiiiiiii -psp VMW_PSP_MRU<br />
  16. 16. Software iSCSI Port Binding(Multipathing) <br />iSCSI initiator can use multiple iSCSI sessions<br />Not possible with the dvswitch<br />Create two VMKernel NICs, each with a different active NIC.<br />Move other NIC’s down to unused adapters for each port respectively.<br />To add the Vmkernels to your SW iSCSI Initiator<br />esxcli swiscsi nic add -n vmk0 -d vmhba33<br />esxcli swiscsi nic add -n vmk1 -d vmhba33<br />esxcli swiscsi nic list -d vmhba33<br />
  17. 17. Software iSCSI Port Binding(Multipathing) <br />Verifying it worked?<br />Check Storage paths to confirm multiple paths<br />Check esxtop for traffic going down both<br />