Re: [FTS Xapian] Status & Questions

[Aki Tuomi]

Did you remember to load fts first?

mail_plugins =$mail_plugins fts fts_xapian

Aki

On 12 January 2019 at 10:37 Joan Moreau via dovecot < dovecot@dovecot.org> wrote:

STATUS

- Alpha code is written and compiling now. (attached)

- I would like to start testing. However, there is an error when

starting dovecot (git) :

Error: Couldn't load required plugin

/usr/lib/dovecot/lib21_fts_xapian_plugin.so: dlopen() failed:

/usr/lib/dovecot/lib21_fts_xapian_plugin.so: undefined symbol:

_Z30fts_backend_default_can_lookupP11fts_backendPK15mail_search_arg

ldd shows that fts lib is properly linked:

# ldd /usr/lib/dovecot/lib21_fts_xapian_plugin.so

(...)

lib20_fts_plugin.so => /usr/lib/dovecot/lib20_fts_plugin.so

(0x00007f25f75e0000)

(...)

libxapian.so.30 => /usr/lib/libxapian.so.30 (0x00007fe3a51e2000)

Your help very welcome

PENDING QUESTIONS

1 - WHat does represent "subargs" in mail_search_args

2 - for rescan : who is responsible for passing again the new email ? Is

the Dovecot core sending again all the emails to index ? or the fts

shall somehow access the mailbox and read all emails ? Wouldn't just be

saying "delete all index and get_last_uid is now 0" the easy way ? or

the fts must process all emails (and block the current thread as a

mailbx maybe quite large)

3 - for get_last_uid : this uncertainity is very unclear. "If there is a

gap, then indexer first indexes all the missing" -> this mean at a

certain point, indexer maybe rebuilding a previous email, so *last* uid

is something different than max. And how indexer does know whther there

is a gap wihtout callong the fts backend (whch it does not as there are

no function for that) ?

Thank you

---
Aki Tuomi