Red Hat ENTERPRISE LINUX 5.5 - S 2010, Руководство пользователя

Страница: 301 / 470

RHEA-2010:0268: python-dmidecode
291
PostgreSQL is an advanced object-relational database management system (DBMS) that supports
almost all SQL constructs (including transactions, subselects and user-defined types and functions).
The postgresql84 packages provide the current 8.4.x release series of PostgreSQL, superseding
the 8.1.x series originally shipped with Red Hat Enterprise Linux 5. Since there are many minor
application-level incompatibilities between 8.1.x and 8.4.x, the original postgresql package set remains
available and will continue to be updated.
postgresql84 is for those users who wish to migrate to a more current PostgreSQL release.
postgresql84 and postgresql packages cannot be installed concurrently on the same system, with
the exception that the postgresql-libs package can remain in place in parallel with postgresql84. The
postgresql-libs package contains client-side library code to which existing applications may be linked.
These libraries will still work with the newer server.
As 8.4.x also has on-disk data format differences from 8.1.x, it is not possible to upgrade an existing
8.1.x PostgreSQL database to 8.4.x merely by replacing the packages. Instead, first dump the
contents of the existing database using the pg_dumpall command, then shut down the old server and
remove the database files (under /var/lib/pgsql/data). Next, remove the old packages and install the
new ones; start the new server; and finally restore the data from the pg_dumpall output.
Note, there are two known issues with this new package as follows:
* on Itanium, the only supported development subpackage architecture is Itanium. While it is possible
to install both i386 and ia64 packages, these contain conflicting files and using the both architectures
together may lead to unpredictable results. The i386 version is unsupported, as the Itanium version of
gcc cannot compile code executable using the IA32 emulation capability. (
BZ#489479
6
)
* while postgresql84 packages are provided, rebuilding other packages with this new version is not
supported. If a package using postgresql-devel is to be rebuilt, a downgrade from postgresql84 to
postgresql is necessary. (
BZ#558746
7
)
Subject to the limitations noted above, users wishing to run PostgreSQL 8.4.x are encouraged to
install these new packages.
2.7. RHEA-2010:0268: python-dmidecode
A new package, python-dmidecode, is now available for Red Hat Enterprise Linux 5.
The python-dmidecode module is a Python extension that uses the code-base of the dmidecode utility,
and presents the DMI data as Python dictionaries or XML utilizing libxml2.
The Desktop Management Interface (DMI) provides the infrastructure for x86-based systems to pass
component-level information up to other applications. The dmidecode utility reads and reports the
information as presented in the DMI tables by a system's BIOS. By providing this data as Python
dictionaries or XML, the new python-dmi-decode module makes this information available to Python-
based applications or applications that can parse XML. (
BZ#546220
8
)
Note: PowerPC and IBM System z systems do not use the DMI standard and, consequently, do not
have DMI tables to decode. If the python-dmidecode module is installed on these systems, however,
the module can read supplied DMI data from x86-based systems.
6
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=489479
7
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=558746
8
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=546220