Dell VNX5600 White Paper: Virtual Data Movers on EMC VNX - Page 10

• Unmounts all file systems on that VDM. • Loads the VDM and mounts all file systems on the target Data Mover. Before you move a VDM, consider the following: • For every CIFS server in a VDM, ensure that the CIFS server's interfaces are available and identically named on the physical Data Mover to which you move the VDM. • The amount of time it takes to update the network information needed to make the VDM available after you move the VDM to a physical Data Mover with a different IP address. Network information might include, but is not limited to, static files, DNS, or the Windows Internet Naming Service (WINS). Planning Considerations VDM Names When naming a VDM, it is recommended that you name it according to its function. This will help identify the VDM and its root file system. For example, you might group Marketing CIFS servers together into a VDM named Marketing so that the VDM is easily identifiable. The VNX assigns the VDM root file system a name in the form of root_fs_vdm_. For example, the root file system for a VDM named Marketing will be root_fs_vdm_Marketing. (If you name a VDM vdm_Marketing, the VNX does not duplicate the VDM part of the name. The root file system is still named root_fs_vdm_Marketing.) If you rename a VDM, its root file system is renamed accordingly. For example, if you rename a VDM to HR, its root file system name changes to root_fs_vdm_HR. VDM root file system size A root file system is assigned to a VDM when it is created. The default size is 128 MB, which is the same for a physical Data Mover. In an environment with a large number of users or shares, you might need to increase the size of the root file system. You cannot have the system extend the root file system automatically. Internationalization modes The VNX supports clients in environments that use multibyte character sets. When supported, multibyte character sets enable universal character encoding standards (Unicode). When a VDM is created, its Internationalization mode is set to the same mode as the Data Mover in which it resides. When the VDM is unloaded, its mode matches the last physical Data Mover on which it was loaded. Virtual Data Movers on VNX 10