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 swh-indexer
 ============
 
 Tools to compute multiple indexes on SWH's raw contents:
 - content:
   - mimetype
   - ctags
   - language
   - fossology-license
   - metadata
 - revision:
   - metadata
 
-## Context
+An indexer is in charge of:
+- looking up objects
+- extracting information from those objects
+- store those information in the swh-indexer db
 
-SWH has currently stored around 5B contents.  The table `content`
-holds their checksums.
-
-Those contents are physically stored in an object storage (using
-disks) and replicated in another. Those object storages are not
-destined for reading yet.
-
-We are in the process to copy those contents over to azure's blob
-storages.  As such, we will use that opportunity to trigger the
-computations on these contents once those have been copied over.
-
-
-## Workers
-
-There are two types of workers:
-- orchestrators (orchestrator, orchestrator-text)
-- indexer (mimetype, language, ctags, fossology-license)
-
-### Orchestrator
-
-
-The orchestrator is in charge of dispatching a batch of sha1 hashes to
-different indexers.
-
-Orchestration procedure:
-- receive batch of sha1s
-- split those batches into groups (according to setup)
-- broadcast those group to indexers
-
-There are two types of orchestrators:
-
-- orchestrator (swh_indexer_orchestrator_content_all): Receives and
-  broadcast sha1 ids (of contents) to indexers (currently only the
-  mimetype indexer)
-
-- orchestrator-text (swh_indexer_orchestrator_content_text): Receives
-  batch of sha1 ids (of textual contents) and broadcast those to
-  indexers (currently language, ctags, and fossology-license
-  indexers).
-
-
-### Indexers
-
-
-An indexer is in charge of the content retrieval and indexation of the
-extracted information in the swh-indexer db.
-
-There are two types of indexers:
+There are multiple indexers working on different object types:
   - content indexer: works with content sha1 hashes
   - revision indexer: works with revision sha1 hashes
+  - origin indexer: works with origin identifiers
 
 Indexation procedure:
 - receive batch of ids
 - retrieve the associated data depending on object type
 - compute for that object some index
 - store the result to swh's storage
-- (and possibly do some broadcast itself)
 
 Current content indexers:
 
-- mimetype (queue swh_indexer_content_mimetype): compute the mimetype,
-  filter out the textual contents and broadcast the list to the
-  orchestrator-text
+- mimetype (queue swh_indexer_content_mimetype): detect the encoding
+  and mimetype
 
-- language (queue swh_indexer_content_language): detect the programming language
+- language (queue swh_indexer_content_language): detect the
+  programming language
 
-- ctags (queue swh_indexer_content_ctags): try and compute tags
-  information
+- ctags (queue swh_indexer_content_ctags): compute tags information
 
-- fossology-license (queue swh_indexer_fossology_license): try and
-  compute the license
+- fossology-license (queue swh_indexer_fossology_license): compute the
+  license
 
-- metadata : translate file into translated_metadata dict
+- metadata: translate file into translated_metadata dict
 
 Current revision indexers:
 
 - metadata: detects files containing metadata and retrieves translated_metadata
   in content_metadata table in storage or run content indexer to translate
   files.