X-Git-Url: http://www.git.stargrave.org/?a=blobdiff_plain;f=Documentation%2Fpublic-inbox-xcpdb.pod;h=1bc1b1dfcc9be471a11d7ec2e3df4ead5453bc81;hb=8e9d4f877730dbdf4ebbd59cbd73a7a921c640e0;hp=e056b5498d2d637e7db39ec615255c0aa417b3c8;hpb=69d84811ba0c4c60a5fb6893817328d76444cdf5;p=public-inbox.git

diff --git a/Documentation/public-inbox-xcpdb.pod b/Documentation/public-inbox-xcpdb.pod
index e056b549..1bc1b1df 100644
--- a/Documentation/public-inbox-xcpdb.pod
+++ b/Documentation/public-inbox-xcpdb.pod
@@ -4,24 +4,36 @@ public-inbox-xcpdb - upgrade Xapian DB formats
 
 =head1 SYNOPSIS
 
-	public-inbox-xcpdb [OPTIONS] INBOX_DIR
+public-inbox-xcpdb [OPTIONS] INBOX_DIR
+
+public-inbox-xcpdb [OPTIONS] --all
 
 =head1 DESCRIPTION
 
 public-inbox-xcpdb is similar to L<copydatabase(1)> for
 upgrading to the latest database format supported by Xapian
 (e.g. "glass" or "honey"), but is designed to tolerate and
-recover from Xapian database modifications from
-L<public-inbox-watch(1)> or L<public-inbox-mda(1)>.
+accept parallel Xapian database modifications from
+L<public-inbox-watch(1)>, L<public-inbox-mda(1)>,
+L<public-inbox-learn(1)>, and L<public-inbox-index(1)>.
+
+This command is rarely used, as Xapian DB formats rarely
+change.
 
 =head1 OPTIONS
 
 =over
 
-=item --compact
+=item --all
+
+Copy all inboxes configured in ~/.public-inbox/config.
+This is an alternative to specifying individual inboxes directories
+on the command-line.
+
+=item -c, --compact
 
 In addition to performing the copy operation, run L<xapian-compact(1)>
-on each Xapian partition after copying but before finalizing it.
+on each Xapian shard after copying but before finalizing it.
 Compared to the cost of copying a Xapian database, compacting a
 Xapian database takes only around 5% of the time required to copy.
 
@@ -30,11 +42,45 @@ preferable for gigantic inboxes where the coarse-grained lock
 currently required for L<public-inbox-compact(1)> can cause
 the compaction to take hours at-a-time.
 
+=item --reshard=N / -R N
+
+Reshard the Xapian database on a L<v2|public-inbox-v2-format(5)>
+inbox to C<N> shards .  Since L<xapian-compact(1)> is not suitable
+for merging, users can rely on this switch to reshard the
+existing Xapian database(s) to any positive value of C<N>.
+
+This is useful in case the Xapian DB was created with too few or
+too many shards given the capabilities of the current hardware.
+
 =item --blocksize / --no-full / --fuller
 
 These options are passed directly to L<xapian-compact(1)> when
 used with C<--compact>.
 
+=item --no-fsync
+
+Disable L<fsync(2)> and L<fdatasync(2)>.
+See L<public-inbox-index(1)/--no-fsync> for caveats.
+
+Available in public-inbox 1.6.0+.
+
+=item --sequential-shard
+
+Copy each shard sequentially, ignoring C<--jobs>.  This also
+affects indexing done at the end of a run.
+
+=item --batch-size=BYTES
+
+=item --max-size=BYTES
+
+See L<public-inbox-index(1)> for a description of these options.
+
+These indexing options indexing at the end of a run.
+C<public-inbox-xcpdb> may run in parallel with with
+L<public-inbox-index(1)>, and C<public-inbox-xcpdb> needs to
+reindex changes made to the old Xapian DBs by
+L<public-inbox-index(1)> while it was running.
+
 =back
 
 =head1 ENVIRONMENT
@@ -64,6 +110,16 @@ used by public-inbox, NOT users upgrading public-inbox itself.
 In particular, it DOES NOT upgrade the schema used by the
 PSGI search interface (see L<public-inbox-index(1)>).
 
+=head1 LIMITATIONS
+
+Do not use L<public-inbox-purge(1)> or L<public-inbox-edit(1)>
+while this is running; old (purged or edited data) may show up.
+
+Normal invocations L<public-inbox-index(1)> can safely run
+while this is running, too.  However, reindexing via the
+L<public-inbox-index(1)/--reindex> switch will be a waste of
+computing resources.
+
 =head1 CONTACT
 
 Feedback welcome via plain-text mail to L<mailto:meta@public-inbox.org>
@@ -73,10 +129,10 @@ and L<http://hjrcffqmbrq6wope.onion/meta/>
 
 =head1 COPYRIGHT
 
-Copyright 2019 all contributors L<mailto:meta@public-inbox.org>
+Copyright 2019-2020 all contributors L<mailto:meta@public-inbox.org>
 
 License: AGPL-3.0+ L<https://www.gnu.org/licenses/agpl-3.0.txt>
 
 =head1 SEE ALSO
 
-L<copydatabase(1)>, L<public-inbox-index(1)>
+L<copydatabase(1)>, L<xapian-compact(1)>, L<public-inbox-index(1)>