Seagate ST43401N/ND Guia de Instalação descarregar pdf (Página 74)

If Your Version is 11.5 or 11.9.x

Stripes

In earlier versions, Backup Server could dump to a maximum of 32 stripes,

either disk or tape. In 12.0, more stripes are available. The maximum number

of stripes it can use is equal to the maximum number of Open Server threads it

can create.

Note The documentation for ASE 12.0 still refers to 32 stripes, but this is an

error.

Network Connections

The maximum number of network connections a local Backup Server can

originate is limited by Open Server to 9118. Therefore, the maximum number

of remote stripes that Backup Server can use in a single

dump or load operation

is 9118.

File Descriptors

Backup Server uses two file descriptors for each stripe apart from the file

descriptors associated with the error log file, interfaces file and other system

files. However, there is a per-thread limitation imposed by the operating system

on the number of file descriptors. Open Server has a limitation of 1280 on the

number of file descriptors that an application can keep track of.

Non-Rewinding Tapes

In ASE 12, the tape head is positioned at the end of valid dump data, which

saves time when you want to perform multiple dump operations. In previous

versions of ASE, Backup Server rewound the tape before each dump operation.

Starting Backup Server

When you start Backup Server, use the -P flag to configure the Open Server for

the maximum number of threads it will create. The maximum number of

threads equals the maximum number of stripes available. If you have started

Backup Server without setting a high enough

-P value and you attempt to dump

or load a database to a number of stripes that exceeds the number of threads,

the dump or load operation will fail.

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Seagate ST43401N/ND Guia de Instalação Página 74