Transfer Large Amounts of Data From External to External Drives

I have 4 each 1.5TB USB 2.0 drives that contain music & movies for use in itunes or apple tv. I purchased two 3TB Thunderbolt drives and would like to transfer the data from the 4 each 1.5TB drives to the new 3TB Thunderbolt drives How Do I Do This?
I have tried to copy/paste drag/drop but only so much moves then stops.
All formatting is MAC Journaled

First I just want to say thank you for the suggestion.
There were no errors shown just stopped after several hours, also sleep is turned off. What I started doing is taking lets say approximately 6GB at a time and maybe doing this 4 or 5 times and after about 20 to 30 minutes it is done and I do this all over again.
I will run the disk utility like you suggested and try that again but give or take there are probably 2500 files that are 2+GB in size and then all of the music files we have collected is around 90GB total if not slightly higher.

Similar Messages

Couldn't copy large amount of data from enterprise DB to Oracle 10g

Hi,
I am using i-batis to copy data from enterprise DB to oracle and viceversa.
The datatype of a field on EDB is 'text' and the datatype on oracle is 'SYS.XMLTYPE'
i am binding these to a java string property in a POJO to bind values.
I could successfully copy limited amount of data from EDB to oracle but if there is more data, i am getting the following exceptions with different oracle drivers ( but i could read large amount of data from EDB):
--- Cause: java.sql.SQLException: ORA-01461: can bind a LONG value only for insert into a LONG column
at com.ibatis.sqlmap.engine.mapping.statement.MappedStatement.executeUpdate(MappedStatement.java:107)
at com.ibatis.sqlmap.engine.impl.SqlMapExecutorDelegate.update(SqlMapExecutorDelegate.java:457)
at com.ibatis.sqlmap.engine.impl.SqlMapSessionImpl.update(SqlMapSessionImpl.java:90)
at com.ibatis.sqlmap.engine.impl.SqlMapClientImpl.update(SqlMapClientImpl.java:66)
at com.aqa.pojos.OstBtlData.updateOracleFromEdbBtlWebservice(OstBtlData.java:282)
at com.aqa.pojos.OstBtlData.searchEdbAndUpdateOracleBtlWebservice(OstBtlData.java:258)
com.ibatis.common.jdbc.exception.NestedSQLException:
--- The error occurred in com/aqa/sqlmaps/SQLMaps_OSTBTL_Oracle.xml.
--- The error occurred while applying a parameter map.
--- Check the updateOracleFromEDB-InlineParameterMap.
--- Check the parameter mapping for the 'btlxml' property.
--- Cause: java.sql.SQLException: setString can only process strings of less than 32766 chararacters
at com.ibatis.sqlmap.engine.mapping.statement.MappedStatement.executeUpdate(MappedStatement.java:107)
at com.iba
I have latest oracle 10g jdbc drivers.
remember, i could copy any amount of data from oracle to EDB but not otherway around.
PLease let me know if you have come across this issue, any recommendation is very much appreciated.
Thanks,
CK.

Hi,
I finally remembered how I solved this issue previously.
The jdbc driver isn't able to directly call the insert with a column xml_type. The solution I was using was to build a wrapper function in plSQL.
Here it is (for insert but I suppose tha update will be the same)
create or replace procedure insertXML(file_no_in in number, program_no_in in varchar2, ost_XML_in in clob, btl_XML_in in clob) is
begin
insert into AQAOST_FILES (file_no,program_no,ost_xml,btl_xml) values(file_no_in, program_no_in, xmltype(ost_XML_in), xmltype(btl_XML_in));
end insertXML;
here is the sqlmap file I used
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE sqlMap
PUBLIC "-//ibatis.apache.org//DTD SQL Map 2.0//EN"
"http://ibatis.apache.org/dtd/sql-map-2.dtd">
<sqlMap>
     <typeAlias alias="AqAost" type="com.sg2net.jdbc.AqAost" />
     <insert id="insert" parameterClass="AqAost">
          begin
               insertxml(#fileNo#,#programNo#,#ostXML:CLOB#,#bltXML:CLOB#);
          end;
     </insert>
</sqlMap>
an here is a simple program
package com.sg2net.jdbc;
import java.io.IOException;
import java.io.Reader;
import java.io.StringWriter;
import java.sql.Connection;
import oracle.jdbc.pool.OracleDataSource;
import com.ibatis.common.resources.Resources;
import com.ibatis.sqlmap.client.SqlMapClient;
import com.ibatis.sqlmap.client.SqlMapClientBuilder;
public class TestInsertXMLType {
     * @param args
     public static void main(String[] args) throws Exception {
          // TODO Auto-generated method stub
          String resource="sql-map-config-xmlt.xml";
          Reader reader= Resources.getResourceAsReader(resource);
          SqlMapClient sqlMap = SqlMapClientBuilder.buildSqlMapClient(reader);
          OracleDataSource dataSource= new OracleDataSource();
          dataSource.setUser("test");
          dataSource.setPassword("test");
          dataSource.setURL("jdbc:oracle:thin:@localhost:1521:orcl");
          Connection connection=dataSource.getConnection();
          sqlMap.setUserConnection(connection);
          AqAost aqAost= new AqAost();
          aqAost.setFileNo(3);
          aqAost.setProgramNo("prg");
          Reader ostXMLReader= Resources.getResourceAsReader("ostXML.xml");
          Reader bltXMLReader= Resources.getResourceAsReader("bstXML.xml");
          aqAost.setOstXML(readerToString(ostXMLReader));
          aqAost.setBltXML(readerToString(bltXMLReader));
          sqlMap.insert("insert", aqAost);
          connection.commit();
     public static String readerToString(Reader reader) {
          StringWriter writer = new StringWriter();
          char[] buffer = new char[2048];
          int charsRead = 0;
          try {
               while ((charsRead = reader.read(buffer)) > 0) {
                    writer.write(buffer, 0, charsRead);
          } catch (IOException ioe) {
               throw new RuntimeException("error while converting reader to String", ioe);
          return writer.toString();
package com.sg2net.jdbc;
public class AqAost {
     private long fileNo;
     private String programNo;
     private String ostXML;
     private String bltXML;
     public long getFileNo() {
          return fileNo;
     public void setFileNo(long fileNo) {
          this.fileNo = fileNo;
     public String getProgramNo() {
          return programNo;
     public void setProgramNo(String programNo) {
          this.programNo = programNo;
     public String getOstXML() {
          return ostXML;
     public void setOstXML(String ostXML) {
          this.ostXML = ostXML;
     public String getBltXML() {
          return bltXML;
     public void setBltXML(String bltXML) {
          this.bltXML = bltXML;
I tested the insert and it works correctly
ciao,
Giovanni

Transporting large amounts of data from one database schema to another

Hi,
We need to move large amount of data from one 10.2.0.4 database schema to another 11.2.0.3 database.
Am currently using datapump but quite slow still - having to do in chunks.
Also the datapump files quite large so having to compress and move across the network.
Is there a better/quicker way?
Habe haerd about transportable tablespaces but never used them and don't know about speed - if quicker thana datapump.
tablespace names different in both databases.
Also source database on solaris opertaing system on sun box
target database on aix on ibm power series box.
Any ideas would be great.
Thanks
Edited by: user5716448 on 08-Sep-2012 03:30
Edited by: user5716448 on 08-Sep-2012 03:31

user5716448 wrote:
Hi,
We need to move large amount of data from one 10.2.0.4 database schema to another 11.2.0.3 database.
Pl quantify "large".
Am currently using datapump but quite slow still - having to do in chunks.
Pl quantify "quite slow".
Also the datapump files quite large so having to compress and move across the network.
Again, pl quantify "quite large".
Is there a better/quicker way?
Habe haerd about transportable tablespaces but never used them and don't know about speed - if quicker thana datapump.
tablespace names different in both databases.
Also source database on solaris opertaing system on sun box
target database on aix on ibm power series box.
It may be possible, assuming you do not violate any of these conditions
http://docs.oracle.com/cd/E11882_01/server.112/e25494/tspaces013.htm#ADMIN11396
Any ideas would be great.
Thanks
Edited by: user5716448 on 08-Sep-2012 03:30
Edited by: user5716448 on 08-Sep-2012 03:31Master Note for Transportable Tablespaces (TTS) -- Common Questions and Issues [ID 1166564.1]
HTH
Srini

How can we transfer huge amount of data from database server to xml format

hi guru
how can we transfer huge amount of data from database server to xml format.
regards
subhasis.

Create ABAP coding
At first we create the internal table TYPES and DATA definition, we want to fill with the XML data. I have declared the table "it_airplus" like the structure from XML file definition for a better overview, because it is a long XML Definition (see the XSD file in the sample ZIP container by airplus.com)
*the declaration
TYPES: BEGIN OF t_sum_vat_sum,
          a_rate(5),
          net_value(15),
          vat_value(15),
         END OF t_sum_vat_sum.
TYPES: BEGIN OF t_sum_total_sale,
        a_currency(3),
        net_total(15),
        vat_total(15),
        vat_sum TYPE REF TO t_sum_vat_sum,
       END OF t_sum_total_sale.
TYPES: BEGIN OF t_sum_total_bill,
        net_total(15),
        vat_total(15),
        vat_sum TYPE t_sum_vat_sum,
        add_ins_val(15),
        total_bill_amount(15),
       END OF t_sum_total_bill.TYPES: BEGIN OF t_ap_summary,
        a_num_inv_det(5),
        total_sale_values TYPE t_sum_total_sale,
        total_bill_values TYPE t_sum_total_bill,
       END OF t_ap_summary.TYPES: BEGIN OF t_ap,
        head    TYPE t_ap_head,
        details TYPE t_ap_details,
        summary TYPE t_ap_summary,
       END OF t_ap.DATA: it_airplus TYPE STANDARD TABLE OF t_ap
*call the transformation
CALL TRANSFORMATION ZFI_AIRPLUS
     SOURCE xml l_xml_x1
     RESULT xml_output = it_airplus
     .see the complete report: Read data from XML file via XSLT program
Create XSLT program
There are two options to create a XSLT program:
Tcode: SE80 -> create/choose packet -> right click on it | Create -> Others -> XSL Transformation
Tcode: XSLT_TOOL
For a quick overview you can watch at the SXSLTDEMO* programs.
In this example we already use the three XSLT options explained later.
As you can see we define a XSL and ASX (ABAP) tags to handle the ABAP and XML variables/tags. After "

Power BI performance issue when load large amount of data from database

I need to load data set from my database, which have large amount of data, it will take so many time to initialize data before I can build report, is there any good way to process large amount of data for PowerBI? As I know many people analysis data based
on PowerBI, is there any suggestion for loading large amount of data from database?
Thanks a lot for help

Hi Ruixue,
We have made significant performance improvements to Data Load in the February update for the Power BI Designer:
http://blogs.msdn.com/b/powerbi/archive/2015/02/19/6-new-updates-for-the-power-bi-preview-february-2015.aspx
Would you be able to try again and let us know if it's still slow? With the latest improvements, it should take between half and one third of the time that it used to.
Thanks,
M.

Store agent started to transfer large amounts of data, eating all my bandwidth. Seemed to just start 5-6 days ago.

About5-6 days ago store agent started to continuously run, sending and receiving large amounts of data. This eats all my bandwidth quickly, essentially rendering my internet access worthless since I have to use satellite internet. I have tried stopping it in the Activity Monitor , but it restarts again. I thought I might have had a virus or something. I downloaded trend micro for Mac, but found its core services essentially did the same thing. I uninstalled, but found that store agent is still running non stop. Ideas?

The storeagent process is a normal part of Mac OS X, not a virus. Remove Trend Micro, which is a quite poor choice for protecting yourself against malware in the first place (see the results of my Mac anti-virus testing 2014), and which isn't really necessary anyway (see my Mac Malware Guide).
As for what it might be doing, as babowa points out, it should be present when the App Store app is open, and at that time, it might be occupied with downloading updates or something similar. If you keep force-quitting it in Activity Monitor, that probably ruins whatever download it was working on, so it has to start all over again, perpetuating the cycle. In general, it is a very bad idea to force-quit processes that are part of Mac OS X without a very good reason and an understanding of what they are.
Go to System Preferences -> App Store:
You will probably want to turn off automatic download of newly available updates, as well as automatic download of apps purchased on other Macs (if you have other Macs). I do not advise turning off the master "Automatically check for updates" box, or the one for installing security updates, as disabling those will reduce the security of your system. These security updates are typically small, so they should have very little impact on your total internet usage.

Copying large amount of data from one table to another getting slower

I have a process that copies data from one table (big_tbl) into a very big archive table (vb_archive_tbl - 30 mil recs - partitioned table). If there are less than 1 million records in the big_tbl the copy to the vb_archive_table is fast (-10 min), but more importantly - it's consistant. However, if the number of records is greater than 1 million records in the big_tbl copying the data into the vb_archive_tbl is very slow (+30 min - 4 hours), and very inconsistant. Every few days the time it takes to copy the same amount of data grows signicantly.
Here's an example of the code I'm using, which uses BULK COLLECT and FORALL INSERST to copy the data.
I occasionally change 'LIMIT 5000' to see performance differences.
DECLARE
TYPE t_rec_type IS RECORD (fact_id NUMBER(12,0),
store_id VARCHAR2(10),
product_id VARCHAR2(20));
TYPE CFF_TYPE IS TABLE OF t_rec_type
INDEX BY BINARY_INTEGER;
T_CFF CFF_TYPE;
CURSOR c_cff IS SELECT *
FROM big_tbl;
BEGIN
OPEN c_cff;
LOOP
FETCH c_cff BULK COLLECT INTO T_CFF LIMIT 5000;
FORALL i IN T_CFF.first..T_CFF.last
INSERT INTO vb_archive_tbl
VALUES T_CFF(i);
COMMIT;
EXIT WHEN c_cff%NOTFOUND;
END LOOP;
CLOSE c_cff;
END;
Thanks you very much for any advice
Edited by: reid on Sep 11, 2008 5:23 PM

Assuming that there is nothing else in the code that forces you to use PL/SQL for processing, I'll second Tubby's comment that this would be better done in SQL. Depending on the logic and partitioning approach for the archive table, you may be better off doing a direct-path load into a staging table and then doing a partition exchange to load the staging table into the partitioned table. Ideally, you could just move big_tbl into the vb_archive_tbl with a single partition exchange operation.
That said, if there is a need for PL/SQL, have you traced the session to see what is causing the slowness? Is the query plan different? If the number of rows in the table is really a trigger, I would tend to suspect that the number of rows is causing the optimizer to choose a different plan (with your sample code, the plan is obvious, but perhaps you omitted some where clauses to simplify things down) which may be rather poor.
Justin

Copying large amount of data from one table to another

We have a requirement to copy data from a staging area (consists of several tables) to the actual tables. The copy operation needs to
1) delete the old values from the actual tables
2) copy data from staging area to actual tables
3) commit only after all rows in the staging area are copied successfully. Otherwise, it should rollback.
Is it possible to complete all these steps in one transaction without causing problems with the rollback segments, etc.? What are the things that I need to consider in order to make sure that we will not run into production problems?
Also, what other best practices/alternative methods are available to accomplish what is described above.
Thanks,
Eser

It's certainly possible to do this in a single transaction. In fact, that would be the best practice.
Of course, the larger your transactions are, the more rollback you need. You need to allocate sufficient rollback (undo in 9i) to handle the transaction size you're expecting.
Justin
Distributed Database Consulting, Inc.
www.ddbcinc.com

What is the best way to migrate large amounts of data from a g3 to an intel mac?

I want to help my mom transfer her photos and other info from an older blueberry G3 iMac to a new intel one. There appears to be no prmigration provision on the older mac. Also the firewire caconnestions are different. Somebody must have done this before.

Hello
the cable above can be use to enable Target Disk mode for data transfert
http://support.apple.com/kb/ht1661 for more info
to enable Target Disk mode just after startup sound Hold on "T" key on key board until see at screen firewire symbol aka screen saver , then plug fire wire cable betwen 2 mac
HTH
Pierre

Delete large amounts of data from a table

I have a table with about 10 fields to store info for customers. Over time as we have added more customers that table has grown to about 14 million rows. As the data comes in a service constantly inserts a row into the table. 90% of the data is not revelent
i.e. I don't want data that is 3 months ago, but the most recent data is used to generate tracking reports. My goal is to write a sql to perform a purge of the data that is older than a month.
Here is my problem I can NOT use TRUNCATE TABLE as I would lose everything? Yesterday I wrote a delete table statement with a where clause. When I ran it on a test system it locked up my table and the simulation gps inserts were intermittently failing. Also
my transaction log grew to over 6GB as it attempted to log each delete.
My first thought was to delete the data a little at a time starting with the oldest first but I was wondering if there was a better way.I am expecting solutions apart from these :
1.Create a temp DB and copy the required data into temp Db and truncate the original.
2.Deleting in chunks(i.e.,1000 -10000 records at a time).
3.Set the Recovery mode as simple

I agree with Satish (+1)
This
is the right way to do it. Your database architect should think about this, and you can use partitioning by the condition for deleting (for example years if you are deleting old year data).
check this like for more details (but most of what you need
Satish already mentioned): http://www.sqlservercentral.com/scripts/Truncate+Table/69506/
* in the link you have SP named TRUNCATE_PARTITION which you can use
[Personal Site] [Blog] [Facebook]

Uploading of large amount of data

Hi all,
i really hope you can help me. I have to upload quite large amount of data from flat files to ODS (via PSA of course). But the process takes very long time. I used method of loadin to PSA and then packet by packet into ODS. Loading of cca 1.300.000 lines from flat file takes about 6 or more hours. It seems strange for me. Is it normal or not?? Or should I use another uploading method or set up ODS some way ?? thanks

hi jj,
welcome to the SDN!
in my limited experience, 6hrs for 1.3M records is a bit too long. here are some things you could try and look into:
- load from the application server, not from the client computer (meaning, move your file to the server where BW is running, to minimize network traffic).
- check your transfer rules and any customer exits related to loading, as the smallest performance-inefficient bits of code can cause a lot of problems.
- check the size of data packets you're transmitting, as it could also cause problems, via tcode RSCUSTA2 (i think, but i'm not 100% sure).
hope ths helps you out - please remember to give out points as a way of saying thanks to those that help you out okay? =)
ryan.

Streaming large amounts of data of socket causes corruption?

I'm wrinting an app to transfer large amounts of data via a simple client/server architecture between two machines.
Problem: If I send the data too 'fast', the data arrives corrupted:
- Calls to read() returns wrong data (wrong 'crc')
- Subsequent calls to read() do not return -1 but allow me to read e.g. another 60 or 80 KBytes.
- available() returns always '0'; but I'll get rid of that method anyway (as recommended in other forum entries).
The behaviour is somewhat difficult to repeat, but it fails for me reliably when transferring the data between two separate machines and when setting the number of packets (Sender.TM) to 1000 or larger.
Workaround: Reduce number of packages send to e.g. 1; or intruduce the 'sleep' on the Sender side. Another workaround: Changing alone to java.nio.* did not help, but when I got rid of the Streams and used solely ByteBuffers, the problem disappeared. Unfortunately the Streams are required by other parts of my application.
I'm running the code on two dual-CPU machines connected via
Below are the code of the Sender and the Listener. Please excuse the style as this is only to demonstrate the problem.
import java.io.IOException;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.nio.channels.Channels;
import java.nio.channels.SocketChannel;
import java.util.Arrays;
public class SenderBugStreams {
    public static void main(String[] args) throws IOException {
        InetSocketAddress targetAdr = new InetSocketAddress(args[0], Listener.DEFAULT_PORT);
        System.out.println("connecting to: "+targetAdr);
        SocketChannel socket = SocketChannel.open(targetAdr);
        sendData(socket);
        socket.close();
        System.out.println("Finished.");
    static final int TM = 10000;
    static final int TM_SIZE = 1000;
    static final int CRC = 2;
    static int k = 5;
    private static void sendData(SocketChannel socket) throws IOException {
        OutputStream out = Channels.newOutputStream(socket);
        byte[] ba = new byte[TM_SIZE];
        Arrays.fill(ba, (byte)(k++ % 127));
        System.out.println("Sending..."+k);
        for (int i = 0; i < TM; i++) {
            out.write(ba);
//            try {
//                Thread.sleep(10);
//            } catch (InterruptedException e) {
//                // TODO Auto-generated catch block
//                e.printStackTrace();
//                throw new RuntimeException(e);
        out.write(CRC);
        out.flush();
        out.close();
import java.io.IOException;
import java.io.InputStream;
import java.net.InetSocketAddress;
import java.nio.channels.Channels;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.SocketChannel;
public class ListenerBugStreams {
    static int DEFAULT_PORT = 44521;
     * @param args
     * @throws IOException
    public static void main(String[] args) throws IOException {
        ServerSocketChannel serverChannel = ServerSocketChannel.open();
        serverChannel.socket().bind(new InetSocketAddress(DEFAULT_PORT));
        System.out.print("Waiting...");
        SocketChannel clientSocket = serverChannel.accept();
        System.out.println(" starting, IP=" + clientSocket.socket().getInetAddress() +
            ", Port="+clientSocket.socket().getLocalPort());
        //read data from socket
        readData(clientSocket);
        clientSocket.close();
        serverChannel.close();
        System.out.println("Closed.");
    private static void readData(SocketChannel clientSocket) throws IOException {
        InputStream in = Channels.newInputStream(clientSocket);
        //read and ingest objects
        byte[] ba = null;
        for (int i = 0; i < SenderBugStreams.TM; i++) {
            ba = new byte[SenderBugStreams.TM_SIZE];
            in.read(ba);
            System.out.print("*");
        //verify checksum
        int crcIn = in.read();
        if (SenderBugStreams.CRC != crcIn) {
            System.out.println("ERROR: Invalid checksum: "+SenderBugStreams.CRC+"/"+crcIn);
        System.out.println(ba[0]);
        int x = in.read();
        int remaining = 0;
        while (x != -1) {
            remaining++;
            x = in.read();
        System.out.println("Remaining:"+in.available()+"/"+remaining);
        System.out.println(" "+SenderBug.TM+" objects ingested.");
        in.close();
}

Here is your trouble:
in.read(ba);read(byte[]) does not read N bytes, it reads up to N bytes. If one byte has arrived then it reads and returns that one byte. You always need to check the return value of read(byte[]) to see how much you got (also check for EOF). TCP chops up the written data to whatever packets it feels like and that makes read(byte[]) pretty random.
You can use DataInputStream which has a readFully() method; it loops calling read() until it gets the full buffer's worth. Or you can write a little static utility readFully() like so:
    // Returns false if hits EOF immediately. Otherwise reads the full buffer's
    // worth. If encounters EOF in mid-packet throws an IOException.
    public static boolean readFully(InputStream in, byte buf[])
        throws IOException
        return readFully(in, buf, 0, buf.length);
    public static boolean readFully(InputStream in, byte buf[], int pos, int len)
        throws IOException
        int got_total = 0;
        while (got_total < len) {
            int got = in.read(buf, pos + got_total, len - got_total);
            if (got == -1) {
                if (got_total == 0)
                    return false;
                throw new EOFException("readFully: end of file; expected " +
                                       len + " bytes, got only " + got_total);
            got_total += got;
        return true;
    }

Selecting large amounts of data

I'm selecting a large amount of data from a database and put the data
into an object file. For some reason the process dies halfway through with an OutOfMemoryException. Any Ideas?
Secondly, does anyone know how to insert carriage returns with a
prepared statement?

I'm selecting a large amount of data from a database
and put the data
into an object file. For some reason the process dies
halfway through with an OutOfMemoryException. Any
Ideas?Like...you are running out of memory?
Have you increased the heap size?
What does "large" mean? 100k or 100gig?
>
Secondly, does anyone know how to insert carriage
returns with a
prepared statement?I suppose you mean how to insert one into a text field.
Do you already have it in the string? If not then you use "\\n" or '\n'.
If you do have it in the string and you inserted it without error then how do you know it isn't already in the database?

Deleting large amounts of data

All,
I have several tables that have about 1 million plus rows of historical data that is no longer needed and I am considering deleting the data. I have heard that deleting the data will actually slow down performance as it will mess up the indexing, is this true? What if I recalculate statistics after deleting the data? In general, I am looking for advice what is best practices for deleting large amounts of data from tables.
For everyones reference I am running Oracle 9.2.0.1.0 on Solaris 9. Thanks in advance for the advice.
Thanks in advance!
Ron

Another problem with delete is that it generates a vast amount of redo log (and archived logs) information . The better way to get rid of the unneeded data would be to use TRUNCATE command:
http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96540/statements_107a.htm#2067573
The problem with truncate that it removes all the data from the table. In order to save some data from the table you can do next thing:
1. create another_table as select * from <main_table> where <data you want to keep clause>
2. save the indexes, constraints, trigger definitions, grants from the main_table
3. drop the main table
4. rename <stage_table> to <main_table>.
5. recreate indexes, constraints and triggers.
Another method is to use partitioning to partition the data based on the key (you've mentioned "historical" - the key could be some date column). Then you can drop the historical data partitions when you need it.
As far as your question about recalculating the statistics - it will not release the storage allocated for index. You'll need to execute ALTER INDEX <index_name> REBUILD :
http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96540/statements_18a.htm
Mike

How can I copy large amount of data between two HD ?

Hello !
Which command could I user to copy large amount of data between two hard disk drives ?
How Lion identify the disk drives when you want to write some script, for example in Windows I sue
Robocopy D:\folder source\Files E:\folder destination
I just want to copy files and if the files/folders exist in destination the files should be overwritted.
Help please, I bougth my first MAC 4 days ago.
Thanks !

Select the files/folders on one HD and drag & drop onto the other HD. The copied ones will overwrite anything with the same names.
Since you're a newcomer to the Mac, see these:
Switching from Windows to Mac OS X,
Basic Tutorials on using a Mac,
Mac 101: Mac Essentials,
Mac OS X keyboard shortcuts,
Anatomy of a Mac,
MacTips,
Switching to Mac Superguide, and
Switching to the Mac: The Missing Manual,
Snow Leopard Edition.&
Additionally, *Texas Mac Man* recommends:
Quick Assist,
Welcome to the Switch To A Mac Guides,
Take Control E-books, and
A guide for switching to a Mac.

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