Use GNU parallel instead of rolling our own (parallel-parse-pgn.sh is unchanged,...

diff --git a/build-book.sh b/build-book.sh
index 38284cf1577dcbf0a2f4e4830081ce32777e916f..7d49663f5fb6f2c90a2bcff821287c6d130b0db2 100755 (executable)
--- a/build-book.sh
+++ b/build-book.sh
@@ -2,7 +2,8 @@
 
 set -e
 
-SHARDS=40
+export SHARDS=40
+export PARALLEL_LOADS=20  # Reduce if you have problems with OOM
 
 rm -f part-*.bin part-*.mtbl part-*.mtbl.part???? open.mtbl.new open.mtbl.part???? open.mtbl.part????.new 2>/dev/null
 
@@ -13,17 +14,12 @@ for FILE in "$@"; do
 done
 date 
 
-for FILE in part-*.bin; do
-       ( ./binloader "$FILE" "${FILE/bin/mtbl}" $SHARDS ) &
-done
-wait
+echo "Loading..."
+parallel -i -j ${PARALLEL_LOADS} bash -c 'FILE="{}"; set -x; ./binloader "$FILE" "${FILE/bin/mtbl}" $SHARDS' -- part-*.bin
 
 rm -f part-*.bin
 
-for X in $( seq 0 $(( SHARDS - 1 )) ); do
-       ( ./binmerger part-*.mtbl.part$( printf %04d $X ) open.mtbl.part$( printf %04d $X ).new ) &
-done
-wait
+parallel -i -j ${PARALLEL_LOADS} bash -c 'X={}; set -x; ./binmerger part-*.mtbl.part$( printf %04d $X ) open.mtbl.part$( printf %04d $X ).new' -- $( seq 0 $(( SHARDS - 1 )) )
 
 for X in $( seq 0 $(( SHARDS - 1 )) ); do
        mv open.mtbl.part$( printf %04d $X ).new open.mtbl.part$( printf %04d $X )