Dell Power Solutions

SCALABLE ENTERPRISE8> 'm:\expdata\order_2.dbf'9> db_file_name_convert="m:\expdata\","+DATA1/";In the Dell test, the RMAN convert command completed in31 minutes and 2 seconds. The same command was used on thetarget Red Hat Enterprise Linux system with the exception of thepaths to the data files. The path on the Linux server was /data/expdata/*.dbf.The next steps prepare the database for the insertion of thetablespaces. Administrators should create the user that owns thetablespaces as well as the directory object to be used by the DataPump import command for importing the metadata and pluggingin the tablespaces.In the Dell test, the following Data Pump import command wasused to plug in the tablespaces:impdp system/oracle dumpfile=expdat.dmpdirectory=data_pump_dirtransport_datafiles=+Data1/cust_1.dbf,+Data1/cust_2.dbf,+Data1/dsmisc.dbf,+Data1/indx_1.dbf,+Data1/indx_2,+Data1/order_1.dbf, +Data1/order_2.dbfFollowing the completion of the command, which usuallytakes less than a minute, a few more steps are required to finishthe migration. The default tablespace for the DS user should beUsing either Data Pumpor TransportableTablespaces can be aneffective way to migrate fromone platform to another.set to be the newly transportedds_misc tablespace;the sequences and data typesmust be created; and thenthe stored procedures shouldbe created to complete themigration. The precedingthree steps are completed byediting the database creationscripts and including onlythe needed sections. Finally,the tablespaces on the target system should be set to read/writewith an alter tablespace command for each tablespace. Thefollowing is an example of this command:Export File transfer Import Total timeData Pump 19 minutes 55 minutes and 1 hour and 2 hours and46 seconds 34 minutes 49 minutesTransportable 37 minutes and 1 hour and 31 minutes and 3 hoursTablespaces5 seconds 52 minutes 2 secondsFigure 5. Time required for Oracle Database 10ggmigration from a Sun Fire V440 server to a DellPowerEdge 6650 serverwork to start and complete the migration but also offers thepossibility of a very fast move. Figure 5 summarizes how long ittook the Dell test team to move the database from a Sun FireV440 server to a Dell PowerEdge 6650 server.In the Dell study, if ASM was not used on the source or targethost, then the time needed to use Transportable Tablespaceswould basically equal the time needed to convert and copy thedata files from one server to another. Even though ASM requiresthat the RMAN utility be used to move the data files in andout of ASM, the additional benefits that ASM provides in termsof ongoing data file management make it worth the extra stepassociated with using RMAN during the migration.Todd Muirhead is an engineering consultant on the Dell Technology Showcase team. Hespecializes in SANs and database systems. Todd has a B.A. in Computer Science fromthe University of North Texas and is Microsoft Certified Systems Engineer + Internet(MCSE+I) certified.Dave Jaffe, Ph.D., is a senior consultant on the Dell Technology Showcase team whospecializes in cross-platform solutions. Previously, he worked in the Dell Server PerformanceLab, where he led the team responsible for Transaction Processing Performance Council(TPC) benchmarks. Before Dell, Dave spent 14 years at IBM in semiconductor processing,modeling, and testing, and in server and workstation performance. He has a Ph.D.in Chemistry from the University of California, San Diego, and a B.S. in Chemistry fromYale University.Paul Rad is a senior software engineer in the Dell Database and Application EngineeringDepartment of the Dell Product Group. Paul’s current interests include operating systems,database systems, clustering, storage technologies, and virtualization. Paul has master’sdegrees in both Computer Science and Computer Engineering from The University of Texasat San Antonio.SQL> alter tablespace ordertbs read write;Moving databases from Sun servers to Dell serversUsing either Data Pump or Transportable Tablespaces canbe an effective way to migrate from one platform to another.The simplicity of Data Pump allows for quick migrations withoutsignificant work to prepare for the actual movement of thedata. Using Transportable Tablespaces potentially requires moreFOR MORE INFORMATIONDell and Oracle supported configurations:www.dell.com/oracleOracle database products:www.oracle.com/database106POWER SOLUTIONS Reprinted from Dell Power Solutions, February 2005. Copyright © 2005 Dell Inc. All rights reserved. February 2005