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Add pg_basebackup -z option for compression with default level

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This commit is contained in:
Peter Eisentraut 2011-05-30 01:02:02 +03:00
parent cb0defe523
commit 6fa79755bd
2 changed files with 28 additions and 5 deletions
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22
doc/src/sgml/ref/pg_basebackup.sgml
View File

@ -168,13 +168,27 @@ PostgreSQL documentation
</listitem>
</varlistentry>
<varlistentry>
<term><option>-z</option></term>
<term><option>--gzip</option></term>
<listitem>
<para>
Enables gzip compression of tar file output, with the default
compression level. Compression is only available when using
the tar format.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-Z <replaceable class="parameter">level</replaceable></option></term>
<term><option>--compress=<replaceable class="parameter">level</replaceable></option></term>
<listitem>
<para>
Enables gzip compression of tar file output. Compression is only
available when using the tar format.
Enables gzip compression of tar file output, and specifies the
compression level (1 through 9, 9 being best
compression). Compression is only available when using the tar
format.
</para>
</listitem>
</varlistentry>
@ -393,11 +407,11 @@ PostgreSQL documentation
</para>
<para>
To create a backup of the local server with one maximum compressed
To create a backup of the local server with one compressed
tar file for each tablespace, and store it in the directory
<filename>backup</filename>, showing a progress report while running:
<screen>
<prompt>$</prompt> <userinput>pg_basebackup -D backup -Ft -Z9 -P</userinput>
<prompt>$</prompt> <userinput>pg_basebackup -D backup -Ft -z -P</userinput>
</screen>
</para>

11
src/bin/pg_basebackup/pg_basebackup.c
View File

@ -126,7 +126,8 @@ usage(void)
printf(_(" -D, --pgdata=DIRECTORY receive base backup into directory\n"));
printf(_(" -F, --format=p|t output format (plain, tar)\n"));
printf(_(" -x, --xlog include required WAL files in backup\n"));
printf(_(" -Z, --compress=0-9 compress tar output\n"));
printf(_(" -z, --gzip compress tar output\n"));
printf(_(" -Z, --compress=0-9 compress tar output with given compression level\n"));
printf(_("\nGeneral options:\n"));
printf(_(" -c, --checkpoint=fast|spread\n"
" set fast or spread checkpointing\n"));
@ -941,6 +942,7 @@ main(int argc, char **argv)
{"format", required_argument, NULL, 'F'},
{"checkpoint", required_argument, NULL, 'c'},
{"xlog", no_argument, NULL, 'x'},
{"gzip", no_argument, NULL, 'z'},
{"compress", required_argument, NULL, 'Z'},
{"label", required_argument, NULL, 'l'},
{"host", required_argument, NULL, 'h'},
@ -1000,6 +1002,13 @@ main(int argc, char **argv)
case 'l':
label = xstrdup(optarg);
break;
case 'z':
#ifdef HAVE_LIBZ
compresslevel = Z_DEFAULT_COMPRESSION;
#else
compresslevel = 1; /* will be rejected below */
#endif
break;
case 'Z':
compresslevel = atoi(optarg);
if (compresslevel <= 0 || compresslevel > 9)