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If Your Version is 11.5 or 11.9.x

New Unix File System Device Support

In release 12.0, Sybase introduced the dsync option of the disk init command.

This option guarantees that writes to database devices placed on Unix file

systems are performed by the operating system as soon as the server flushes the

data. In the past, the server might log a write, but the operating system buffered

the data. If the system went down, the server had no way to recover the buffered

data that was lost.

The

dsync option could cause a performance problem in some cases. If you

place

tempdb on a file system, you should consider disabling dsync on that

device. For more information about using the

dsync option to protect data on

Unix file systems, see the

System Administration Guide at

http://manuals.sybase.com:80/onlinebooks/group-

as/asg1250e/sag/@Generic__BookView

Changes to dbids

In ASE 12, the dbids of the following databases start at 31513:

•

dbccalt

• dbccdb

• sybsecurity

• sybsystemdb

• sybsystemprocs

If you drop and recreate these databases after an upgrade, ASE applies these

new

dbids. The dbids for all other databases are determined in the same way as

in earlier versions.

Note If you perform an upgrade in place, that is, you upgrade without

rebuilding your system, you should not see any change in

dbid between

versions. This is an issue only if your maintenance scripts use these IDs and

you build a new system from scratch, which will then use the new ID

conventions.

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Seagate ST43401N/ND Guida di Installazione Pagina 76