</listitem>

</varlistentry>

<varlistentry>

<term><option>--clone</option></term>

<listitem>

<para>

Use efficient file cloning (also known as <quote>reflinks</quote> on

some systems) instead of copying files to the new data directory,

which can result in near-instantaneous copying of the data files.

</para>

<para>

If a backup manifest is not available or does not contain checksum of

the right type, file cloning will be used to copy the file, but the

file will be also read block-by-block for the checksum calculation.

</para>

<para>

File cloning is only supported on some operating systems and file

systems. If it is selected but not supported, the

<application>pg_combinebackup</application> run will error. At present,

it is supported on Linux (kernel 4.5 or later) with Btrfs and XFS (on

file systems created with reflink support), and on macOS with APFS.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term><option>--copy-file-range</option></term>

<listitem>

<para>

Use the <function>copy_file_range</function> system call for efficient

copying. On some file systems this gives results similar to

<option>--clone</option>, sharing physical disk blocks, while on others

it may still copy blocks, but do so via an optimized path. At present,

it is supported on Linux and FreeBSD.

</para>

<para>

If a backup manifest is not available or does not contain checksum of

the right type, <function>copy_file_range</function> will be used to

copy the file, but the file will be also read block-by-block for the

checksum calculation.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term><option>--manifest-checksums=<replaceable class="parameter">algorithm</replaceable></option></term>

<listitem>

</listitem>

</varlistentry>

<varlistentry>

<term><option>--clone</option></term>

<listitem>

<para>

Use efficient file cloning (also known as <quote>reflinks</quote> on

some systems) instead of copying files to the new data directory,

which can result in near-instantaneous copying of the data files.

</para>

<para>

If a backup manifest is not available or does not contain checksum of

the right type, file cloning will be used to copy the file, but the

file will be also read block-by-block for the checksum calculation.

</para>

<para>

File cloning is only supported on some operating systems and file

systems. If it is selected but not supported, the

<application>pg_combinebackup</application> run will error. At present,

it is supported on Linux (kernel 4.5 or later) with Btrfs and XFS (on

file systems created with reflink support), and on macOS with APFS.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term><option>--copy-file-range</option></term>

<listitem>

<para>

Use the <function>copy_file_range</function> system call for efficient

copying. On some file systems this gives results similar to

<option>--clone</option>, sharing physical disk blocks, while on others

it may still copy blocks, but do so via an optimized path. At present,

it is supported on Linux and FreeBSD.

</para>

<para>

If a backup manifest is not available or does not contain checksum of

the right type, <function>copy_file_range</function> will be used to

copy the file, but the file will be also read block-by-block for the

checksum calculation.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term><option>-V</option></term>

<term><option>--version</option></term>

printf(_(" -o, --output output directory\n"));

printf(_(" -T, --tablespace-mapping=OLDDIR=NEWDIR\n"

" relocate tablespace in OLDDIR to NEWDIR\n"));

printf(_(" --clone clone (reflink) instead of copying files\n"));

printf(_(" --copy-file-range copy using copy_file_range() syscall\n"));

printf(_(" --manifest-checksums=SHA{224,256,384,512}|CRC32C|NONE\n"

" use algorithm for manifest checksums\n"));

printf(_(" --no-manifest suppress generation of backup manifest\n"));

printf(_(" --sync-method=METHOD set method for syncing files to disk\n"));

printf(_(" --clone clone (reflink) instead of copying files\n"));

printf(_(" --copy-file-range copy using copy_file_range() syscall\n"));

printf(_(" -?, --help show this help, then exit\n"));

printf(_("\nReport bugs to <%s>.\n"),PACKAGE_BUGREPORT);