Veritas InfoScale™ Virtualization Guide - Linux on ESXi
- Section I. Overview
- About Veritas InfoScale solutions in a VMware environment
- Section II. Deploying Veritas InfoScale products in a VMware environment
- Getting started
- Understanding Storage Configuration
- Section III. Use cases for Veritas InfoScale product components in a VMware environment
- Application availability using Cluster Server
- Multi-tier business service support
- Improving storage visibility, availability, and I/O performance using Dynamic Multi-Pathing
- How DMP works
- Improving data protection, storage optimization, data migration, and database performance
- Protecting data with Veritas InfoScale product components in the VMware guest
- Optimizing storage with Veritas InfoScale product components in the VMware guest
- Migrating data with Veritas InfoScale product components in the VMware guest
- Improving database performance with Veritas InfoScale product components in the VMware guest
- Setting up virtual machines for fast failover using Storage Foundation Cluster File System High Availability on VMware disks
- About setting up Storage Foundation Cluster File High System High Availability on VMware ESXi
- Configuring coordination point (CP) servers
- Section IV. Reference
Enabling the multi-write flag
Enable the multi-write flag if you plan to setup an SFCFSHA configuration. For detailed instructions on how to enable the multi-writer flag, see the steps in the following VMware article:
http://kb.vmware.com/kb/1034165
The steps given below illustrate the example where five VMDK files are configured and are shared by four virtual machines (VMs). These VMs constitute the four nodes of the cluster and they are powered off. Now it is time to enable the multi-writer flag for each of the VMs.
To enable the mult-write flag for a virtual machine
- On the vSphere Client, right-click on the cfs01 virtual machine. Go to Edit Settings > Options > Advanced > General > Configuration Parameters….
- Select Add Row.
- Enter scsi1:0.sharing on the Name column.
- Enter multi-writer on the Value column.
- Repeat steps 2 through 4 and enter the multi-writer value for the rest of the SCSI controllers and targets. For the example configuration:
scsi1:1.sharing multi-writer scsi1:2.sharing multi-writer scsi1:3.sharing multi-writer scsi1:4.sharing multi-writer
Once those steps are done, the VM configuration will resemble:
disk.EnableUUID
true
scsi1:0.sharing
multi-writer
scsi1:1.sharing
multi-writer
scsi1:2.sharing
multi-writer
scsi1:3.sharing
multi-writer
scsi1:4.sharing
multi-writer
- Press OK to confirm.
- Repeat steps 1 to 6 for the other virtual machines (cfs02, cfs03 and cfs04 in the example configuration).
- Once all the virtual machines have been configured correctly, power them on and verify that there are no issues. Note that the disks have been added to each of the hosts.
Example configuration for cfs01:
# vxdisk list DEVICE TYPE DISK GROUP STATUS vmdk0_0 auto:none - - online invalid vmdk0_1 auto:none - - online invalid vmdk0_2 auto:none - - online invalid vmdk0_3 auto:none - - online invalid vmdk0_4 auto:none - - online invalid vmdk0_5 auto:none - - online invalid [root@cfs01 ~]#