3 public-inbox-xcpdb - upgrade Xapian DB formats
7 public-inbox-xcpdb [OPTIONS] INBOX_DIR
9 public-inbox-xcpdb [OPTIONS] --all
13 public-inbox-xcpdb is similar to L<copydatabase(1)> for
14 upgrading to the latest database format supported by Xapian
15 (e.g. "glass" or "honey"), but is designed to tolerate and
16 accept parallel Xapian database modifications from
17 L<public-inbox-watch(1)>, L<public-inbox-mda(1)>,
18 L<public-inbox-learn(1)>, and L<public-inbox-index(1)>.
20 This command is rarely used, as Xapian DB formats rarely
29 Copy all inboxes configured in ~/.public-inbox/config.
30 This is an alternative to specifying individual inboxes directories
37 In addition to performing the copy operation, run L<xapian-compact(1)>
38 on each Xapian shard after copying but before finalizing it.
39 Compared to the cost of copying a Xapian database, compacting a
40 Xapian database takes only around 5% of the time required to copy.
42 Compared to L<public-inbox-compact(1)>, use of this option is
43 preferable for gigantic inboxes where the coarse-grained lock
44 currently required for L<public-inbox-compact(1)> can cause
45 the compaction to take hours at-a-time.
51 Reshard the Xapian database on a L<v2|public-inbox-v2-format(5)>
52 inbox to C<N> shards . Since L<xapian-compact(1)> is not suitable
53 for merging, users can rely on this switch to reshard the
54 existing Xapian database(s) to any positive value of C<N>.
56 This is useful in case the Xapian DB was created with too few or
57 too many shards given the capabilities of the current hardware.
65 These options are passed directly to L<xapian-compact(1)> when
66 used with C<--compact>.
70 Disable L<fsync(2)> and L<fdatasync(2)>.
71 See L<public-inbox-index(1)/--no-fsync> for caveats.
73 Available in public-inbox 1.6.0+.
75 =item --sequential-shard
77 Copy each shard sequentially, ignoring C<--jobs>. This also
78 affects indexing done at the end of a run.
80 =item --batch-size=BYTES
82 =item --max-size=BYTES
84 See L<public-inbox-index(1)> for a description of these options.
86 These indexing options indexing at the end of a run.
87 C<public-inbox-xcpdb> may run in parallel with with
88 L<public-inbox-index(1)>, and C<public-inbox-xcpdb> needs to
89 reindex changes made to the old Xapian DBs by
90 L<public-inbox-index(1)> while it was running.
100 The default config file, normally "~/.public-inbox/config".
101 See L<public-inbox-config(5)>
103 =item XAPIAN_FLUSH_THRESHOLD
105 The number of documents to update before committing changes to
106 disk. This environment is handled directly by Xapian, refer to
107 Xapian API documentation for more details.
115 This tool is intended for admins upgrading Xapian search databases
116 used by public-inbox, NOT users upgrading public-inbox itself.
118 In particular, it DOES NOT upgrade the schema used by the
119 PSGI search interface (see L<public-inbox-index(1)>).
123 Do not use L<public-inbox-purge(1)> or L<public-inbox-edit(1)>
124 while this is running; old (purged or edited data) may show up.
126 Normal invocations L<public-inbox-index(1)> can safely run
127 while this is running, too. However, reindexing via the
128 L<public-inbox-index(1)/--reindex> switch will be a waste of
133 Feedback welcome via plain-text mail to L<mailto:meta@public-inbox.org>
135 The mail archives are hosted at L<https://public-inbox.org/meta/> and
136 L<http://4uok3hntl7oi7b4uf4rtfwefqeexfzil2w6kgk2jn5z2f764irre7byd.onion/meta/>
140 Copyright 2019-2021 all contributors L<mailto:meta@public-inbox.org>
142 License: AGPL-3.0+ L<https://www.gnu.org/licenses/agpl-3.0.txt>
146 L<copydatabase(1)>, L<xapian-compact(1)>, L<public-inbox-index(1)>