HP EVA P6000 Manual do Utilizador descarregar pdf (Página 2)

Introduction

Storage systems evolve rapidly these days on features and capacity. Adaptation to this technical evolution forces

IT managers to migrate the data of applications and business processes on a periodic basis to newer generations of

storage systems. There are many strategies and tools for executing this migration and the actual choice depends on

factors like heterogeneity support, complexity of operation, level of host access disruption during migration, level of

automation, performance of the storage system and fabric during migration, migration speed and bandwidth throttling

capabilities, license model, and cost.

Built on the solid capabilities, performance, and ease of use of the HP 3PAR Peer Motion Manager tool for 3PAR-to-3PAR

systems, HP has created the HP 3PAR Online Import tool to migrate data from EVA P6000 to HP 3PAR StoreServ storage.

HP 3PAR Online Import runs within P6000 Command View, which orchestrates all stages of the data migration cycle to

ensure the migration process is simple and foolproof. No external appliance is used and minimal planning is required to

start an Online Import migration. The HP 3PAR Online Import webpage is located at hp.com/go/storeserv7000.

HP 3PAR Online Import is part of HP Storage Federation, enabling on-demand data mobility between storage arrays in a

local or metro area without cost, complexity, downtime, or the use of external appliances.

This paper focuses on the operational side of Online Import. It deals with concepts, technical prerequisites, the workflow

of an Online Import migration, and contains a Best Practices section. The paper assumes that the reader is familiar with

the EVA P6000 and the HP 3PAR StoreServ platform and has read the EVA to 3PAR Online Import Migration Guide

Terminology

Throughout the paper we identify the EVA P6000 array that contains the data to be migrated by Online Import as the

“source” array. The HP 3PAR StoreServ system, where the data will be migrated to, is called the “destination” array.

The server whose data volumes undergo migration from the source to the destination array is called the “host.” Volumes

on the EVA P6000 source system are called vdisks, volumes on the HP 3PAR StoreServ destination system are called

virtual volumes or VVs. A “zoning” operation creates a logical connection in the SAN between a Fibre Channel (FC) host

bus adapter (HBA) on a server and one on a storage system.

Concepts

HP 3PAR Online Import migrates data from HP EVA P6000 to HP 3PAR StoreServ systems without the use of host-based

mirroring or an external appliance. Online Import is orchestrated from within P6000 Command View 10.2 or higher. The

granularity of a migrated object is an entire vdisk. The import of data into the destination system happens either online,

with a short disruption to the host I/O, or in an offline fashion. The EVA P6000 and the HP 3PAR StoreServ systems are

interconnected via dual FC links and SAN switches serving as the dedicated path for the data transfer between the

source and the destination system.

The coordination between the host and the storage systems for a migration is managed by a software wizard running

inside P6000 Command View. The wizard walks the administrator through the steps to define the source and destination

systems, select the volumes to migrate and start the migration. The wizard informs the administrator when to make SAN

zone changes if any are needed. Zone/unzone operations are executed manually and outside of P6000 Command View

using vendor-specific SAN switch management tools.

Starting at the actual data migration, the selected vdisks on the source EVA P6000 receive a Management Lock to

prevent them from being migrated twice or mounted to another host. Online Import does not support the reverse

migration of volumes from HP 3PAR StoreServ to EVA P6000.

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HP EVA P6000 Manual do Utilizador Página 2