Building a New Master Device

You can create a new master device using the dataserver utility.

The master device is built using the build mode in dataserver. After the master device is built, the server shuts down. You must then manually start the server in the start mode. After this you can start, stop, and restart the SAP ASE server whenever necessary without having to rebuild the master device

Note: When you are building a master device you should allow an additional 8K for the config block.

The SAP ASE server uses:

Logical page size – these are the pages that the database objects are built with. A databases and any of its related objects must use the same logical page size. Logical page sizes come in sizes of 2K, 4K, 8K, and 16K.
Virtual page size – this is the physical page allocation at the disk level, and is always done in 2K pages. All disk I/O is done in multiples of virtual page size.
Memory page size – the memory allocated and managed within the SAP ASE server. The memory page size is always in units of 2K pages.

To create a new master device with dataserver, use:

dataserver -ddevice_name
. . . 
	b [master_device_size [k|K|m|M|g|G]
	[-z logical_page_size [k|K]
-h

where:

-d device_name – is the full path name of the device for the master database. The master database device must be writable by the user who starts the SAP ASE server. The default master database device name is d_master.

-b – indicates that dataserver is in build mode and creating a new master device, and indicates the size of the master device. If you do not provide a unit specifier (k, m, g) for the size of the device, dataserver assumes a size in virtual pages. The size of a virtual page is always 2K. For example:

-b 51204 – specifies a device of 51,204 virtual pages (100.0078125MB).
-b 100M – specifies a device of 100MB

-z – specifies the logical page size, which is always 2K, 4K, 8K, or 16K. This parameter is optional during the build phase and is ignored during the start mode. If you do not include the -z parameter during the build mode, the master device is built with 2K logical pages.

-h – prints the syntax for the dataserver command.

Environments When Using dataserver
When you start an SAP ASE server with dataserver, it derives its running environment from these places.
Specifying Device and Logical Page Sizes When Building a New SAP ASE Server
Create a new SAP ASE server by issuing dataserver using the -b and -z options.
Starting an Existing a SAP ASE Server
To start an existing SAP ASE server, issue dataserver without the -b and -z options:
Upgrading to a Server With Larger Page Sizes
SAP ASE earlier than version 12.5 used 2K logical page sizes. You cannot change an installation’s page size by upgrading. That is, if your current SAP ASE uses 2K logical pages, you can upgrade only to an SAP ASE server that uses 2K logical pages.
Viewing the Current Server Limits
To display information about the SAP ASE server’s limits:

Parent topic: Using dataserver Build Servers

Related reference

dataserver