Re: babelia

[Amirouche Boubekki <amirouche.boubekki@gmail.com>]

Hello all!

Le sam. 16 nov. 2019 à 11:06, Amirouche Boubekki <
amirouche.boubekki@gmail.com> a écrit :

> I restarted working on my personal search engine.
>

After two weeks of work, 41 files changed, 1845 insertions(+), 441
deletions(-) and 97 commits, I tagged a v0.2.0 in the repository at:

  https://git.sr.ht/~amz3/guile-babelia

The babelia index and babelia search subcommands were removed. Instead, one
has to `make web` to spawn a server and then hit the
/api/search?query=foobar to make a search. To index stuff, one can POST a
file like test.scm to /api/index or rely on babelia crawler subcommands.
The crawler is still a work-in-progress. Do not expect the index to be
compatible with future releases.


>
> The last iteration, gotofish, was not too bad even if it has bitrot.
> Based on my research and practical experiment, it seems very clear
> that there is no workaround the use of map-reduce, that might be known
> as n-par-for-each [3].
>
> [3]
> https://www.gnu.org/software/guile/manual/html_node/Parallel-Forms.html#index-n_002dpar_002dfor_002deach
>
> I made a prototype similar to that n-par-for-each, except it works
> with guile-fibers, is asynchronous and works with a shared pool of
> threads instead of spawning N threads for each incoming query like
> gotofish does.


Actually, what I need is n-for-each-par-map where map happens in parallel.
The implementation can be found in the babelia/pool.scm file [4].

[4] https://git.sr.ht/~amz3/guile-babelia/tree/v0.2.0/babelia/pool.scm

The installation process is still a little bit akward, because one needs to
change the path to wiredtiger-3.2.0-0 shared library in the source. Add my
channel [5] and do `make init` to get started.

[5] https://git.sr.ht/~amz3/guix-amz3-channel



Happy hacking!