3 public-inbox-index - create and update search indices
7 public-inbox-index [OPTIONS] INBOX_DIR...
9 public-inbox-index [OPTIONS] --all
13 public-inbox-index creates and updates the search, overview and
14 NNTP article number database used by the read-only public-inbox
15 HTTP and NNTP interfaces. Currently, this requires
16 L<DBD::SQLite> and L<DBI> Perl modules. L<Search::Xapian>
17 is optional, only to support the PSGI search interface.
19 Once the initial indices are created by public-inbox-index,
20 L<public-inbox-mda(1)> and L<public-inbox-watch(1)> will
21 automatically maintain them.
23 Running this manually to update indices is only required if
24 relying on L<git-fetch(1)> to mirror an existing public-inbox;
25 or if upgrading to a new version of public-inbox using
26 the C<--reindex> option.
28 Having the overview and article number database is essential to
29 running the NNTP interface, and strongly recommended for the
30 HTTP interface as it provides thread grouping in addition to
31 normal search functionality.
39 Influences the number of Xapian indexing shards in a
40 (L<public-inbox-v2-format(5)>) inbox.
42 See L<public-inbox-init(1)/--jobs> for a full description
45 C<--jobs=0> is accepted as of public-inbox 1.6.0
46 to disable parallel indexing regardless of the number of
49 If the inbox has not been indexed or initialized, C<JOBS - 1>
50 shards will be created (one job is always needed for indexing
51 the overview and article number mapping).
53 Default: the number of existing Xapian shards
57 Compacts the Xapian DBs after indexing. This is recommended
58 when using C<--reindex> to avoid running out of disk space
59 while indexing multiple inboxes.
61 While option takes a negligible amount of time compared to
62 C<--reindex>, it requires temporarily duplicating the entire
63 contents of the Xapian DB.
65 This switch may be specified twice, in which case compaction
66 happens both before and after indexing to minimize the temporal
67 footprint of the (re)indexing operation.
69 Available since public-inbox 1.4.0.
73 Forces a re-index of all messages in the inbox.
74 This can be used for in-place upgrades and bugfixes while
75 NNTP/HTTP server processes are utilizing the index. Keep in
76 mind this roughly doubles the size of the already-large
77 Xapian database. Using this with C<--compact> or running
78 L<public-inbox-compact(1)> afterwards is recommended to
81 public-inbox protects writes to various indices with
82 L<flock(2)>, so it is safe to reindex (and rethread) while
83 L<public-inbox-watch(1)>, L<public-inbox-mda(1)> or
84 L<public-inbox-learn(1)> run.
86 This does not touch the NNTP article number database.
87 It does not affect threading unless C<--rethread> is
92 Index all inboxes configured in ~/.public-inbox/config.
93 This is an alternative to specifying individual inboxes directories
98 Regenerate internal THREADID and message thread associations
101 This fixes some bugs in older versions of public-inbox. While
102 it is possible to use this without C<--reindex>, it makes little
105 Available in public-inbox 1.6.0+.
109 Run L<git-gc(1)> to prune and expire reflogs if discontiguous history
110 is detected. This is intended to be used in mirrors after running
111 L<public-inbox-edit(1)> or L<public-inbox-purge(1)> to ensure data
112 is expunged from mirrors.
114 Available since public-inbox 1.2.0.
116 =item --max-size SIZE
118 Sets or overrides L</publicinbox.indexMaxSize> on a
119 per-invocation basis. See L</publicinbox.indexMaxSize>
122 Available since public-inbox 1.5.0.
124 =item --batch-size SIZE
126 Sets or overrides L</publicinbox.indexBatchSize> on a
127 per-invocation basis. See L</publicinbox.indexBatchSize>
130 When using rotational storage but abundant RAM, using a large
131 value (e.g. C<500m>) with C<--sequential-shard> can
132 significantly speed up and reduce fragmentation during the
133 initial index and full C<--reindex> invocations (but not
134 incremental updates).
136 Available in public-inbox 1.6.0+.
140 Disables L<fsync(2)> and L<fdatasync(2)> operations on SQLite
141 and Xapian. This is only effective with Xapian 1.4+. This is
142 primarily intended for systems with low RAM and the small
143 (default) C<--batch-size=1m>. Users of large C<--batch-size>
144 may even find disabling L<fdatasync(2)> causes too much dirty
145 data to accumulate, resulting on latency spikes from writeback.
147 Available in public-inbox 1.6.0+.
149 =item --sequential-shard
151 Sets or overrides L</publicinbox.indexSequentialShard> on a
152 per-invocation basis. See L</publicinbox.indexSequentialShard>
155 Available in public-inbox 1.6.0+.
159 Stop storing document data in Xapian on an existing inbox.
161 See L<public-inbox-init(1)/--skip-docdata> for description and caveats.
163 Available in public-inbox 1.6.0+.
165 =item --update-extindex=EXTINDEX, -E
167 Update the given external index (L<public-inbox-extindex-format(5)>.
168 Either the configured section name (e.g. C<all>) or a directory name
171 Defaults to C<all> if C<[extindex "all"]> is configured,
172 otherwise no external indices are updated.
174 May be specified multiple times in rare cases where multiple
175 external indices are configured.
177 =item --no-update-extindex
179 Do not update the C<all> external index by default. This negates
180 all uses of C<-E> / C<--update-extindex=> on the command-line.
186 For v1 (ssoma) repositories described in L<public-inbox-v1-format(5)>.
187 All public-inbox-specific files are contained within the
188 C<$GIT_DIR/public-inbox/> directory.
190 v2 inboxes are described in L<public-inbox-v2-format(5)>.
196 =item publicinbox.indexMaxSize
198 Prevents indexing of messages larger than the specified size
199 value. A single suffix modifier of C<k>, C<m> or C<g> is
200 supported, thus the value of C<1m> to prevents indexing of
201 messages larger than one megabyte.
203 This is useful for avoiding memory exhaustion in mirrors
204 via git. It does not prevent L<public-inbox-mda(1)> or
205 L<public-inbox-watch(1)> from importing (and indexing)
208 This option is only available in public-inbox 1.5 or later.
212 =item publicinbox.indexBatchSize
214 Flushes changes to the filesystem and releases locks after
215 indexing the given number of bytes. The default value of C<1m>
216 (one megabyte) is low to minimize memory use and reduce
217 contention with parallel invocations of L<public-inbox-mda(1)>,
218 L<public-inbox-learn(1)>, and L<public-inbox-watch(1)>.
220 Increase this value on powerful systems to improve throughput at
221 the expense of memory use. The reduction of lock granularity
222 may not be noticeable on fast systems. With SSDs, values above
223 C<4m> have little benefit.
225 For L<public-inbox-v2-format(5)> inboxes, this value is
226 multiplied by the number of Xapian shards. Thus a typical v2
227 inbox with 3 shards will flush every 3 megabytes by default
228 unless parallelism is disabled via C<--sequential-shard>
231 This influences memory usage of Xapian, but it is not exact.
232 The actual memory used by Xapian and Perl has been observed
233 in excess of 10x this value.
235 This option is available in public-inbox 1.6 or later.
236 public-inbox 1.5 and earlier used the current default, C<1m>.
238 Default: 1m (one megabyte)
240 =item publicinbox.indexSequentialShard
242 For L<public-inbox-v2-format(5)> inboxes, setting this to C<true>
243 allows indexing Xapian shards in multiple passes. This speeds up
244 indexing on rotational storage with high seek latency by allowing
245 individual shards to fit into the kernel page cache.
247 Using a higher-than-normal number of C<--jobs> with
248 L<public-inbox-init(1)> may be required to ensure individual
249 shards are small enough to fit into cache.
251 Warning: interrupting C<public-inbox-index(1)> while this option
252 is in use may leave the search indices out-of-date with respect
253 to SQLite databases. WWW and IMAP users may notice incomplete
254 search results, but it is otherwise non-fatal. Using C<--reindex>
255 will bring everything back up-to-date.
257 Available in public-inbox 1.6.0+.
259 This is ignored on L<public-inbox-v1-format(5)> inboxes.
261 Default: false, shards are indexed in parallel
263 =item publicinbox.<name>.indexSequentialShard
265 Identical to L</publicinbox.indexSequentialShard>,
266 but only affect the inbox matching E<lt>nameE<gt>.
276 Used to override the default "~/.public-inbox/config" value.
278 =item XAPIAN_FLUSH_THRESHOLD
280 The number of documents to update before committing changes to
281 disk. This environment is handled directly by Xapian, refer to
282 Xapian API documentation for more details.
284 For public-inbox 1.6 and later, use C<publicinbox.indexBatchSize>
287 Setting C<XAPIAN_FLUSH_THRESHOLD> or
288 C<publicinbox.indexBatchSize> for a large C<--reindex> may cause
289 L<public-inbox-mda(1)>, L<public-inbox-learn(1)> and
290 L<public-inbox-watch(1)> tasks to wait long and unpredictable
291 periods of time during C<--reindex>.
293 Default: none, uses C<publicinbox.indexBatchSize>
299 Occasionally, public-inbox will update it's schema version and
300 require a full index by running this command.
304 Feedback welcome via plain-text mail to L<mailto:meta@public-inbox.org>
306 The mail archives are hosted at L<https://public-inbox.org/meta/>
307 and L<http://hjrcffqmbrq6wope.onion/meta/>
311 Copyright 2016-2021 all contributors L<mailto:meta@public-inbox.org>
313 License: AGPL-3.0+ L<https://www.gnu.org/licenses/agpl-3.0.txt>
317 L<Search::Xapian>, L<DBD::SQLite>, L<public-inbox-extindex-format(5)>