tablespace

Test 81 used a DMS file tablespace, and a small additional benefit would probably have occurred if a DMS raw tablespace had been used.

The index tablespace is optional, so the system tablespace can be used for indexing purpose, instead of the index tablespace.

Thus a database backup, or at least a tablespace backup, should be executed following the data movement operation.

However, if the db2empfa command has been run against the database, each SMS tablespace has new pages allocated for it an extent at a time.

The default is to use the same tablespace name as from the source, in which case, the input mapping for this tablespace is not necessary.

If the specified tablespace does not exist, the copy of the objects using that tablespace fails and is logged in the error file.

This option can only be used for database managed tablespace (DMS).

Note also that you should also look towards the bottom of the db2exfmt output to verify that the tablespace configuration match.

Extend size of a tablespace should be the same as stripe width or multiple of strip size of the RAID device.

A tablespace is an abstraction of a collection of containers into which database objects are stored.

All tablespace containers that are not part of the database directory must be part of the split mirror.

The only exception is Linux raw device tablespace containers, which inherently bypass the file cache.

In this case, DB2MOVE is able to chose any available tablespace to be used as the target.

IBMCATGROUP - default database partition group for the tablespace containing the system catalogs.

A database must have at least one tablespace.

If Roslyn wants to use a specific tablespace on the target database for the new tables, she specifies it in this window.

Identifies the tablespace used by the logging table for an article published from an Oracle database.

For every different page size tablespace, there should be a matching page size buffer pool.

This ensures that any user tables whose row size exceeds 4K bytes is successfully created into a 32K page size tablespace.

To recover a loss datafile that belongs to READ-ONLY tablespace is an easy task indeed.

The sample code in the Download section contains the full SQL used to create the database STOGROUP, TABLESPACE, and TABLE.

But again , you will have to make sure that if a tablespace is of type DMS or SMS on production , it must remain the same type in test .

The important information used by the optimizer for a tablespace is the following.

A tablespace is a logical layer between the database and the container objects that actually hold the data.

A string containing tablespace information to be added to each table definition.

Recovering from the loss of a data file that belongs to a traditional rollback segment tablespace.

With the default behavior, the user is forced to take backups of each tablespace that was loaded into.

When Alter Tablespace ts_name End Backup is issued, again a checkpoint SCN is recorded at the headers of online backup data files.

Table in a separate tablespace and on a separate physical disc and also define a separate bufferpool for audit log data.

If you want the tables to reside in another tablespace, alter the script accordingly before you run it.

Within a Logical Node, each tablespace is defined across two arrays, using 13 drives from each array, for a total of 26 hard drives.

The tablespace size required to meet your specifications is displayed in the Analysis section.

If no tablespace is defined, the default tablespace is used for the new tables.

You cannot specify this clause for a tablespace or for a rollback segment.

The tablespace for the new table SALES_TMP is explicitly defined through the IN option.

Where -l generates the DDL statements for tablespace, database partition, groups, and buffer pool.

In this sample scenario, IBMDB2SAMPLEREL serves as the destination tablespace for moving table SALES.

As shown in Listing 16, create a tablespace with one container named cont1.

You can always disable Performance Expert from collecting container and tablespace data.

To create Query Patroller control tables and register a target tablespace to store query result tables.

TABLESPACE_MAP The user may specify tablespace name mappings to be used instead of the tablespaces from the source system during a copy.

Another problem may occur if no DB2 tablespace of a given length is available.

Never put more than one container of the same tablespace on the same physical disk.

If you click on the above tablespace, you can see the properties for that tables space with the ability to change various properties.

A tablespace provides a level of indirection between a database and the tables stored within the database.

This type of scenario also results in the tablespace becoming inaccessible.

It is recommended for database managed tablespaces to split regular data from LOB data, placing LOB data in a large tablespace.

Since READ-ONLY tablespace is never modified, simply restore the datafile to its original location shall do the job.

If you are adding database partitions, you will be asked to specify the tablespace information for the new partitions.

The SYS_ANY keyword is being used since it's not possible to have a tablespace starting with "SYS" .

In Oracle 9i, Oracle introduced the UNDO tablespace concept, which replaces the rollback segment.

The tablespace has become inaccessible because its container was deleted, and all the data you inserted in the table is lost!

You can also optionally specify the tablespace (Oracle) or segment (Sybase) where these remote control tables will be created.

Complete recovery can be done at the database level or data file and tablespace level.

Allocate buffer pools for every page size you defined for tablespace.

When a tablespace is created, it is assigned to the default buffer pool IBMDEFAULTBP.

In addition, the user can specify specific mappings for some tablespaces, and the default tablespace selection algorithm for the remaining.

Instead, it writes the data directly to the data pages in the tablespace.

In the database, five regular tablespaces and one temporary tablespace are defined.

Name of the tablespace containing the index.

Therefore, the new owner never requires use privileges on the tablespace in order to accept the ownership of a table.

Create regular tablespace TS page, size 16K, managed by system using (FNIS buffer pool BP).

In this example, all the tables are created under the default tablespace, USERSPACE1.

Set the retention guarantee on the tablespace (Oracle 10G and greater).

Create a table named table1 in the cont1 tablespace, as shown in Listing 17.

Ater tablespace user begin backup.

IMPORTANT: For DB2, you must create an additional regular user tablespace with a page size of 16 KB.

Mount the split mirror copy of all tablespace containers.

Table and tablespace size limits in DB2 are on a per partition basis.

A default database created by DB2 has a tablespace with a 4K page size.

This is an array of tablespace mappings surrounded by brackets.

Or, you may not have a separate tablespace device available at all in the test environment.

The tablespace should have enough space for all 141 CD tables.

Create DB2 database, buffer pool, and tablespace with more than 4K.

Give a name for the tablespace.

db2pd reports a lockwait situation for a row lock occurring on table with ID 6 in tablespace with ID 2.

As we defined in the profile, all these tables will be stored in the same tablespace.

To install MobiLink system tables using the setup script, an IBM DB2 tablespace must use a minimum of 8 Kb pages.

Regular data will be placed in tablespace TBS1 and index data will be placed in TBS2.

If a tablespace does not use 8 Kb pages, complete the following steps.

In DB2 versions prior to 9. 1, tables were often moved between tablespaces because the maximum size of a tablespace was reached.

First, see how to move a table from one tablespace into another tablespace.

The next example demonstrates how to alter the tablespace not only for table data, but also for indexes and LOBs.

Listing 9 shows a sample result set from a tablespace ID and table ID query such as the one above.

In addition to tablespace USERSPACE1, there is a second tablespace IBMDB2SAMPLEREL that is intended for storing user data, too.

Transportable Tablespace and Its Application in Backup and Restore of Oracle Database

The next example demonstrates how to move the CUSTOMER_INFO table to a new tablespace

Specify a tablespace, but it must be a user temporary

Recovering from the loss of a data file that belongs to the system tablespace

Alter user system default tablespace SYSTEM; alter user system temporary tablespace TEMP; spool off rem

Recovering from the loss of a datafile that belongs to a temporary tablespace

Recovering from the loss of a datafile that belongs to a readonly tablespace

Relative tablespace weight: A function of access density and access latency

segments within a tablespace. In this example, a segment has two extents

ALTER DATABASE DEFAULT TEMPORARY TABLESPACE TEMP;

Number of used pages (defined in units of tablespace page size)

Remove physical files of the tablespace and recreate them

Buffer pool index physical reads (defined in units of tablespace page size)

Recovering from the loss of a data file that belongs to an indexes-only tablespace

Buffer pool data physical reads (defined in units of tablespace page size)

Drop temporary tablespace temp including contents and datafiles;

create materialized view log on test_id tablespace ttts with primary key;

The following tablespace identifiers are required

grant unlimited tablespace to userName

Tablespace and Rollback Segment Locks

Alter tablespace users begin backup;

list backup of tablespace tablespace_name

TEMP alter user sys temporary tablespace TEMP; rem

PWH. TABLESPACE for table space snapshot data

revoke unlimited tablespace from newuser;

ALTER TABLE TABLENAME MOVE TABLESPACE TABLESPACENAME;

alter table name move tablespace newtablespace

Alter user default tablespace xxx;

Alter tablespace users end backup;

create user ly identified by pw default tablespace users quota 10M on users;

alter table mytable move tablespace myspace;

Existing tablespace can now be altered to map to buffer pool bp1. The following example maps the emp tablespace to buffer pool bp1

TS_QUOTAS Tablespace quotas for all users

Offline the data file or tablespace

Here is a sample output of the db2 list tablespaces command showing the tablespace state

Example of how to back up a tablespace

create materialized view log on mv_lvy_levytaxbgtdiv tablespace zgmv_date

There are times you want to do a data file and tablespace level recovery. In this case you have to do the following

Say, for example, in production you have the following tablespace