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Clarify statements about tar archive format.

This commit is contained in:
Tom Lane 2010-02-23 17:28:09 +00:00
parent 8a12aac32b
commit 1bc8acca25
1 changed files with 16 additions and 12 deletions
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28
doc/src/sgml/ref/pg_dump.sgml
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@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/pg_dump.sgml,v 1.116 2010/02/19 14:36:45 momjian Exp $
$PostgreSQL: pgsql/doc/src/sgml/ref/pg_dump.sgml,v 1.117 2010/02/23 17:28:09 tgl Exp $
PostgreSQL documentation
-->
@ -77,8 +77,8 @@ PostgreSQL documentation
the <quote>custom</quote> format (<option>-Fc</option>). It allows
for selection and reordering of all archived items, and is compressed
by default. The <application>tar</application> format
(<option>-Ft</option>) is not compressed and it is not possible to
reorder data when loading, but it is otherwise quite flexible;
(<option>-Ft</option>) is not compressed and has restrictions on
reordering data when loading, but it is otherwise quite flexible;
moreover, it can be manipulated with standard Unix tools such as
<command>tar</command>.
</para>
@ -224,10 +224,11 @@ PostgreSQL documentation
<term><literal>custom</></term>
<listitem>
<para>
Output a custom archive suitable for input into
<application>pg_restore</application>. This is the most flexible
format in that it allows reordering of loading data as well
as object definitions. This format is also compressed by default.
Output a custom-format archive suitable for input into
<application>pg_restore</application>.
This is the most flexible output format in that it allows manual
selection and reordering of archived items during restore.
This format is also compressed by default.
</para>
</listitem>
</varlistentry>
@ -237,11 +238,14 @@ PostgreSQL documentation
<term><literal>tar</></term>
<listitem>
<para>
Output a <command>tar</command> archive suitable for input into
<application>pg_restore</application>. Using this archive format
allows reordering and/or exclusion of database objects
at the time the database is restored. It is also possible to limit
which data is reloaded at restore time.
Output a <command>tar</command>-format archive suitable for input
into <application>pg_restore</application>.
This output format allows manual selection and reordering of
archived items during restore, but there is a restriction: the
relative order of table data items cannot be changed during
restore. Also, <command>tar</command> format does not support
compression and has a limit of 8 GB on the size of individual
tables.
</para>
</listitem>
</varlistentry>