3
Use cases
Online Import has a number of use cases that illustrate its business value. The most important use cases include:
Zero downtime technology refresh
Technology refreshes have always been a challenging activity in the data center. Customers are faced with the choice of
either staying on their old storage technologies or refresh their technologies with forced downtime. Obviously, neither
is a good solution. On supported host operating systems, HP 3PAR Online Import allows customers to move data from
their current EVA P6000 arrays to HP 3PAR StoreServ systems in a nondisruptive manner. There is no need to wait for
planned server downtime to migrate to the new HP 3PAR StoreServ system you acquired, or for synchronizing your
financial and operational decisions.
GUI-assisted data migration
Storage data migration can be host, array, or appliance driven. Some migration tools run from the command line, which
makes them hard to use. HP Online Import for EVA P6000 to HP 3PAR StoreServ offers a graphically oriented user interface
operated by the clicks of a mouse within the familiar environment of the P6000 Command View EVA. With all prerequisites
checked in the background by the Online Import application, ease of use in data migration is now available to all levels of
system administrators.
Appliance-less data migration
Appliances brought into the data center, even for a short time, are a concern to IT managers for security, LAN and SAN
connectivity, power, and performance. Many commercial solutions for data migration require the installation of an appliance
that shares SAN bandwidth with other arrays and applications. HP 3PAR Online Import has no dependencies on new
technology layers or extra tools and works without requiring complex planning. The source and destination arrays are
interconnected in a peer fashion using a dedicated set of FC links between them, resulting in no disruption to other SAN
traffic during the data transfer.
Features
At installation time of P6000 Command View, Online Import is an included component with the “Typical” installation
option. The installation of the Online Import component at a later stage is possible. P6000 Command View installed on
the array-based management (ABM) card is not supported for Online Import.
In an Online Import migration operation, we start out from a host server with the HP MPIO DSM for EVA P6000 installed.
The host is zoned to the source EVA P6000 system that has one or more vdisks presented to this host. The EVA P6000
is also zoned to the destination HP 3PAR StoreServ system through the two Peer links. An Online Import migration
starts by selecting in P6000 Command View either a vdisk or a host on the source EVA P6000. The sequence of tasks
to complete an Online Import migration depends on the operating system of the host. Figure 1 shows the migration
options tree diagram for Online Import. “Host migration” means that all vdisks presented to this host are migrated to
the HP 3PAR StoreServ system.
Windows® systems support the “minimally disruptive” and the “offline” types of migration. In “minimally disruptive,” a
planned reboot of the Windows operating system on the host is required to accommodate the zoning changes. The actual
migration of the data that represents the larger part of an Online Import operation is performed online with the applications
up and running. In the “offline” migration of Windows hosts, the vdisks selected for migration are not presented to a host.
On non-Windows hosts, the migration is either “online” with no disruption to the host I/O or “offline.” The migration type is
automatically determined based on the operating system of the host and the online or offline status of the vdisks selected.
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