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Diffstat (limited to 'TODO')
| -rw-r--r-- | TODO | 47 |
1 files changed, 47 insertions, 0 deletions
@@ -134,3 +134,50 @@ Achieve 100% test coverage with the test suite. Investigate why the notmuch database is slightly larger than the sup database for the same corpus of email. + +Xapian +------ +Fix defect #250 + + replace_document should make minimal changes to database file + http://trac.xapian.org/ticket/250 + + It looks like it's going to be easy to fix. Here's the file to + change: + + xapian-core/backends/flint/flint_database.cc + + And look for: + + // FIXME - in the case where there is overlap between the new + // termlist and the old termlist, it would be better to compare the + // two lists, and make the minimum set of modifications required. + // This would lead to smaller changesets for replication, and + // probably be faster overall + + So I think this might be as easy as just walking over two + sorted lists looking for differences. + + Note that this is in the currently default "flint" backend, + but the Xapian folks are probably more interested in fixing + the in-development "chert" backend. So the patch to get + upstreamed there will probably also fix: + + xapian-core/backends/chert/chert_database.cc + + (I'm hoping the fix will be the same---an identical comment + exists there.) + + Also, if you want to experiment with the chert backend, + compile current Xapian source and run notmuch with + XAPIAN_PREFER_CHERT=1. I haven't tried that yet, but there are + claims that a chert database can be 40% smaller than an + equivalent flint database. + +Report this bug: + + "tag:foo and tag:bar and -tag:deleted" goes insane + + This seems to be triggered by a Boolean operator next to a + token starting with a non-word character---suddenly all the + Boolean operators get treated as literal tokens) |