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- This is the 20 Feb 1993 Performance Release of C News, a minor update
- to the 2 May 1992 P.R. that just fixes some installation problems and
- a couple of annoying bugs. Everything that was in the "known.problems"
- file on UUNET as of 17 Feb 1993 has been fixed, in particular, as well
- as a couple of things that were noticed after those fixes went out.
-
- This release is more or less a halfway step to what we've
- been calling the "cleanup release". Its main claims to fame are
- (a) major modifications to improve performance for big-league
- sites with a lot of outgoing feeds, and (b) a reimplemented and
- much improved ihave/sendme subsystem. A number of changes planned
- for the cleanup release have also been started, although many of
- them are not yet finished. This release may have some rough
- edges yet: due to various complications, including Henry being
- seriously ill at an inconvenient time, it's not as well-polished
- as we usually prefer.
-
- We are not releasing patches to bring you up to this release --
- they would be too big -- and will not be releasing patches to bring
- this one up to the cleanup release -- same reason.
-
- People who are happy with the older C News might want to wait for the
- cleanup release, which is still coming although behind schedule.
- People with performance problems or ihave/sendme problems probably
- want to install this one, though, and we'd welcome feedback on
- how well it behaves.
-
- A quick overview of changes:
-
- inews is now largely written in C and runs about 10 times as fast as the
- old one. anne.jones is gone; I wish I could say the same of its namesake.
- The state has no business in the movie theaters of the nation.
-
- The inews etc. machinery now puts articles into the in.coming spool
- directory rather than firing up relaynews directly. This may cause some
- delays in postings (although newsrun is now run rather more frequently
- if you use the recommended cron configuration), but avoids a swamp of
- problems with setuid, NFS, ulimit, etc etc.
-
- The ngmatch routine has been rewritten and extended to permit pre-parsing
- of frequently-matched patterns and to make the matching itself much
- faster. relaynews makes use of pre-parsing to cope rapidly with many and
- complex sys entries.
-
- news(5) has been split up due to its size and the resulting pages are
- better organised.
-
- documentation has been coalesced into a single Installation & Operations
- Guide (excluding manual pages), with a table of contents and an index.
-
- Newsrun is now much more careful about space checking (the December
- release introduced some problems in this area). It also copes better
- with an unwriteable or nonexistent in.coming/bad directory, which used
- to cause infinite loops and massive errlog bloat if any batch hit
- problems in relaynews.
-
- ihave/sendme has been reimplemented (twice!) and is now simpler to set up
- and faster to process ihave and sendme control messages.
-
- There is a start at a news mirroring and restoral facility (see
- relaynews(8)).
-
- relaynews now writes "master batch files" and so processes articles more
- quickly for sites with many outgoing feeds. There is a new exploder
- program to turn these quickly into normal batch files.
-
- Batching has changed to 16-bit compression as the default. 12-bit
- compression is still available for the few who need it.
-
- The space checkers are much more careful about some tricky issues,
- and include provisions for much better estimates of inode consumption.
-
- There is now an expireiflow command that can be run frequently to trigger
- an expire when space gets too low (assuming you're short of space and
- willing to run expire at random times).
-
- Addmissing has been revised to lock the news system only as needed, and
- generally is much more practical as something to run occasionally on an
- operational system rather than only as an emergency measure.
-
- Control messages with serious mischief potential are now delayed 24 hours,
- with a note to the local sysadmin. Newsdaily handles actual execution of
- the requests, which occurs only if the control message hasn't been
- cancelled meanwhile. This is done for both "sendsys" and "version";
- "senduuname" is gone entirely. This scheme is somewhat vulnerable to
- sites that expire the "control" pseudo-newsgroup quickly anyway, but
- it seemed the simplest way of handling the increasing sendsys mess.
-
- There is an (incomplete, ill-documented) provision for controlling how
- the "newgroup" control message is handled.
-
- Newswatch has provisions to keep an eye out for space shortages.
-
- As usual, there have been assorted bits of cleanup and improvement
- that don't merit specific mention (and possibly some we should mention
- but have forgotten about).
-