[PATCH] TODO: notes about v2 format for giant archives

[Eric Wong <e@80x24.org>]

Inspired by interest in LKML archival:

https://public-inbox.org/meta/d5546b24-5840-4ae9-d25b-5e3e737ed73b@linuxfoundation.org
---
 TODO | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/TODO b/TODO
index 3163b8a..605013e 100644
--- a/TODO
+++ b/TODO
@@ -78,3 +78,34 @@ all need to be considered for everything we introduce)
 * more and better test cases (use git fast-import to speed up creation)
 
 * large mbox/Maildir/MH/NNTP spool import (see PublicInbox::Import)
+
+* Read-only WebDAV interface to the git repo so it can be mounted
+  via davfs2 or fusedav to avoid full clones.
+
+* Improve tree layout to help giant archives (v2 format):
+
+  * Must be optional; old ssoma users may continue using v1
+
+  * Xapian becomes becomes a requirement when using v2; they
+    claim good scalability: https://xapian.org/docs/scalability.html
+
+  * Allow git to perform better deltafication for quoted messages
+
+  * Changing tree layout for deltafication means we need to handle
+    deletes for spam differently than we do now.
+
+  * Deal with duplicate Message-IDs (web UI, at least, not sure about NNTP)
+
+  * (Maybe) SQLite alternatives (MySQL/MariaDB/Pg) for NNTP article
+    number mapping: https://www.sqlite.org/whentouse.html
+
+  * Ref rotation (splitting heads by YYYY or YYYY-MM)
+
+  * Support multiple git repos for a single archive?
+    This seems gross, but splitting large packs in in git conflicts
+    with bitmaps and we want to use both features.  Perhaps this
+    limitation can be fixed in git instead of merely being documented:
+    https://public-inbox.org/git/20160428072854.GA5252@dcvr.yhbt.net/
+
+  * Optional history squashing to reduce commit and intermediate
+    tree objects
-- 
EW