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(************************************************************************)
(* This file is part of SKS. SKS is free software; you can
redistribute it and/or modify it under the terms of the GNU General
Public License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA *)
(***********************************************************************)
(** Executable: Builds up the key database from a multi-file database dump.
This version works faster by virtue of not actually copying the keys out of
the datbaase dump, and only storing the locations of those keys.
*)
module F(M:sig end) =
struct
open StdLabels
open MoreLabels
open Printf
open Arg
open Common
module Set = PSet.Set
module Unix = UnixLabels
open Packet
let settings = {
Keydb.withtxn = false;
Keydb.cache_bytes = !Settings.cache_bytes;
Keydb.pagesize = !Settings.pagesize;
Keydb.dbdir = Lazy.force Settings.dbdir;
Keydb.dumpdir = Lazy.force Settings.dumpdir;
}
module Keydb = Keydb.Unsafe
let n = match !Settings.n with 0 -> 1 | x -> x
let maxkeys = n * 15000
let dumpdir = Lazy.force Settings.dumpdir
let lsdir dir =
let dirhandle = Unix.opendir dir in
let rec loop accum = match (try Some (Unix.readdir dirhandle)
with End_of_file -> None)
with
Some fname -> loop (fname::accum)
| None -> accum
in
loop []
let rec list_mapi list ~f =
let rec loop list i ~f =
match list with
[] -> []
| x::tl -> (f i x)::(loop tl (i + 1) ~f)
in
loop list 0 ~f
let timestr sec =
sprintf "%.2f min" (sec /. 60.)
(******************************************************)
type 'a badoption = Bad | Good of 'a | Done
(** get single md using nextkey function *)
let get_keymd fnum nextkey =
match (try nextkey ()
with e ->
perror "error parsing key in file %d: %s. Skipping rest of file"
fnum (Printexc.to_string e);
None
)
with
| Some (pos,key) ->
begin
try
let ckey = Fixkey.canonicalize key in
if ckey = key then
(* no need to canonicalize key *)
let offset = { Keydb.fnum = fnum;
Keydb.pos = pos;
}
in
Good (Keydb.key_to_metadata_large_offset offset key)
else
(* must use canonicalized version of key *)
Good (Keydb.key_to_metadata ckey)
with
Fixkey.Bad_key -> Bad
end
| None ->
Done
let rec get_keymds_rec ~max fnum nextkey accum =
if max = 0
then (accum,0)
else
match get_keymd fnum nextkey with
| Done -> (accum,max)
| Bad -> get_keymds_rec ~max fnum nextkey accum
| Good md ->
get_keymds_rec ~max:(max-1) fnum nextkey
(md::accum)
(** Fetches a collection of no more than max keys. Returns (keys,bool), with
the second argument being true of there is more to read from the given
file. *)
let rec get_keymds ~max fnum nextkey =
get_keymds_rec ~max fnum nextkey []
let inchan_to_nextkey inchan =
let cin = new Channel.sys_in_channel inchan in
Key.pos_next_of_channel cin
let rec get_keymds_list ~max nflist partial =
match nflist with
[] -> (partial,[])
| (fnum,nextkey)::tl ->
if max = 0 then (partial,nflist)
else
let (mds,remaining) = get_keymds ~max fnum nextkey in
flush stdout;
if remaining > 0 then (
(* file must be done with, so don't pass it on *)
get_keymds_list ~max:remaining tl (List.rev_append mds partial)
) else (
(* file is not (necessarily) done,
but we've got the key mds we need *)
(List.rev_append mds partial,nflist)
)
let get_keymds_list ~max nflist = get_keymds_list ~max nflist []
let dbtimer = MTimer.create ()
let timer = MTimer.create ()
let run () =
set_logfile "fastbuild";
if Sys.file_exists (Lazy.force Settings.dbdir) then (
perror "KeyDB directory already exists. Exiting.";
eprintf "KeyDB directory already exists. Exiting.\n";
exit (-1)
);
Unix.mkdir (Lazy.force Settings.dbdir) 0o700;
Keydb.open_dbs settings;
Keydb.set_meta ~key:"filters" ~data:"yminsky.dedup";
let filearray = Keydb.get_dump_filearray () in
let nfarray = Array.mapi ~f:(fun i x -> (i,inchan_to_nextkey x))
filearray in
let nflist = Array.to_list nfarray in
perror "Loading %d keys at a time" maxkeys;
protect
~f:(fun () ->
let rec loop nflist = match nflist with
[] -> ()
| nflist ->
MTimer.start timer;
perror "Loading metadata..."; flush stdout;
let (mds,nflist) = get_keymds_list ~max:maxkeys nflist in
perror " %d keys loaded, %d files left"
(List.length mds) (List.length nflist);
MTimer.start dbtimer;
Keydb.add_mds mds;
MTimer.stop dbtimer;
MTimer.stop timer;
perror " DB time: %s. Total time: %s."
(timestr (MTimer.read dbtimer))
(timestr (MTimer.read timer));
flush stdout;
loop nflist
in
loop nflist
)
~finally:(fun () -> Keydb.close_dbs ())
end
|