Oracle database reorganization (moving datafiles to new filesystems)

Hi All,
We are planning to perform a database reorganization (moving datafiles to new filesystems) in our Production environment using SAPDBA.
We had noticed in our recent performance reports that few datafiles in some of the SAPDATAxx filesystems are having higher I/O contention and are putting heavy load on those filesystems resulting in poor performance. So, we had identified the datafiles and planning to move them to new SAPDATA filesystems (uniformly distribute the datafiles to stabilize the I/O). Below are the version information.
SAP: 3.0F
Oracle: 9.2.0.8
OS: HP-UX 11.23
SAPDBA: 6.20
I'm going through SAP notes and Oracle documentation on this.Can you please share your experiences if similar activity was carried out by any of you and the documents relating to this.
Your inputs on this is very much appreciated.
Thanks,
Vasu

If your goal is just to make use of new storage, it is fairly straightforward and quick to move the datafiles as others mentioned. However, moving the datafile will NOT reorganize tables/tablespaces.
You can optionally reorg tables/tablespaces in addition to the move of datafiles. This generally saves space and helps performance. If you decide to reorg, I would suggest you move the datafiles to faster storage then reorg (since reorg itself is highly IO intensive).
Some points to consider:
- perform the reorg when business use is least
- perform online reorg where possible
- online reorg creates temporary snaps, typically in the users default tablespace, make sure it has sufficient space
- start with small tables/tablespaces first to get throughput estimate and also estimate of reduction in size
- estimate the size of target tablespace (how small it is going to be compared to source) and build the target tablespace smaller to avoid wasting space
- watch the space usage of the target tablespace when the reorg is running
- if you are reorging individual tables, make sure the indexes are rebuilt
Hope this helps.
Regards,
Shan

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4 ETW000 R3trans version 6.13 (release 700 - 20.02.06 - 16:15:00).
4 ETW000 unicode enabled version
4 ETW000 ===============================================
4 ETW000
4 ETW000 date&time   : 13.11.2007 - 10:16:48
4 ETW000 control file: <no ctrlfile>
4 ETW000 R3trans was called as follows: R3trans -d
4 ETW000 trace at level 2 opened for a given file pointer
4 ETW000 [dev trc     ,00000] Tue Nov 13 10:16:48 2007                              81 0.000081
4 ETW000 [dev trc     ,00000] db_con_init called                                    29 0.000110
4 ETW000 [dev trc     ,00000] create_con (con_name=R/3)                             50 0.000160
4 ETW000 [dev trc     ,00000] Loading DB library '/usr/sap/P01/SYS/exe/run/dboraslib.o' ...
4 ETW000                                                                              43 0.000203
4 ETW000 [dev trc     ,00000] load shared library (/usr/sap/P01/SYS/exe/run/dboraslib.o), hdl 0
4 ETW000                                                                           13346 0.013549
4 ETW000 [dev trc     ,00000] Library '/usr/sap/P01/SYS/exe/run/dboraslib.o' loaded
4 ETW000                                                                              32 0.013581
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4 ETW000                                                                              35 0.013616
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4 ETW000                                                                              53 0.013669
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4 ETW000                                                                              34 0.013703
4 ETW000 [dev trc     ,00000] function dbdd_exp_funs loaded from library /usr/sap/P01/SYS/exe/run/dboraslib.o
4 ETW000                                                                              53 0.013756
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4 ETW000                                                                              39 0.013818
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4 ETW000                                                                              32 0.013895
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4 ETW000                                                                              37 0.013932
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4 ETW000                                                                             325 0.014257
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4 ETW000                                                                              34 0.017600
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4 ETW000                                                                              35 0.017635
4 ETW000 [dev trc     ,00000]    0 UTF8                                                      1 0x110f8b9c0 0x110fa3e38 0x110fa36e8
4 ETW000                                                                              36 0.017671
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4 ETW000 [dev trc     ,00000] Allocating server context handle                      24 0.017732
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4 ETW000                                                                              72 0.017804
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4 ETW000                                                                           36191 0.053995
4 ETW000 [dev trc     ,00000] Allocating user session handle                        73 0.054068
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4 ETW000                                                                              43 0.054111
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4 ETW000                                                                           10613 0.064724
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4 ETW000                                                                             964 0.065688
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4 ETW000                                                                            1183 0.066871
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4 ETW000                                                                             146 0.067118
4 ETW000 [dev trc     ,00000] Now I'm disconnected from ORACLE                     409 0.067527
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4 ETW000                                                                              34 0.067584
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4 ETW000                                                                              36 0.067620
4 ETW000 [dev trc     ,00000]    0 UTF8                                                      1 0x110f8b9c0 0x110fa3e38 0x110fa36e8
4 ETW000                                                                              36 0.067656
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4 ETW000                                                                              37 0.067756
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4 ETW000                                                                           33690 0.101446
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4 ETW000                                                                              36 0.101482
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4 ETW000                                                                             122 0.101604
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4 ETW000                                                                              34 0.101638
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