Storage setup

Storage ID: name of the storage
Storage Type: type of the storage. Use storage type "SM_TRS_SIQ" for the Sybase IQ transparent storage.
Description: short text description

Connection mode: O for open connection; open SQL is used
DB Connection Name: existing SAP database connection.
Load stripe size: optional, see below the Performance improvements section
Load stripe width: optional, see below the Performance improvements section

Performance improvements

Load striping

"Striping data across multiple disks is an essential technique for good performance.

Disk striping can be performed at different places in a system, often as part of RAID hardware or software". More information can be found under Disk striping.

Load striping parallelize data inserts across multiple disc drives. In order to setup stripe load, a database connection should be configured to support this feature.

Example configuration of DBCO:

SYBASE_SERVER=<server>.<domain>.<ext>

SYBASE_PORT=<port> e.g.34238

SYBASE_IQ_ENGINE=server_NLS_42

SYBASE_DBNAME=SAPIQDB

SYBASE_CONTYPE=IQ

SYBASE_IQ_LOAD=1

SYBASE_IQ_CESU-8=1

SYBASE_IQ_LOCKWAIT=600

SYBASE_IQ_BUFFER_SIZE=500000

SIQ_BULK_OP=1

Please refer to Sybase IQ documentation, page 75.

Example from the HD1 system, DBCO:

SYBASE_SERVER=vsks032

SYBASE_PORT=2648

SYBASE_IQ_ENGINE=vsks032_HD1

SYBASE_DBNAME=SAPHD1DB

SYBASE_IQ_LOCKWAIT=600

SYBASE_CONTYPE=IQ

SYBASE_IQ_CESU-8=1

SYBASE_IQ_LOAD=1

SYBASE_IQ_BUFFER_SIZE=500000

After DBCO is configured to support the stripe load, you should enable striping in storage management setup, as follows: (screenshot above).

Settings :

Load stripe size: size of stripe on disc, expressed as a multiple of SYBASE_IQ_BUFFER_SIZE value
Load stripe width: degree of parallelism

More information on SAP Stripe load implementation.

Partitioning

Partitioning allows parallel inserts into a DB table.

To use partitioning, you must first create (register) partitioning on a table. To perform this call the method /DVD/SM_IF_TAB-ADD_TABLE_PARTITIONING. Partitioning must be enabled on an empty table, ideally just after creating it (CREATE_TABLE).

Afterwards create a partition, before inserting data, by calling the method /DVD/SM_IF_TAB-ADD_PARTITION. Otherwise the INSERT statement will fail, because data cannot be assorted to partitions.

There are two corresponding methods to check if partitioning is enabled on a table: /DVD/SM_IF_TAB-PARTITIONING_EXISTS and to check if partition with given name exists on the table /DVD/SM_IF_TAB-PARTITION_EXISTS.

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