A program "write.pl" continue to generate data to test.db, another program read.pl continuously from the test.db read data. When the data test.db is 1 to 30, but only read.pl read 1 to 9, after that always show 9.

I want to run write.pl at the same time running read.pl, rather than wait until the write.pl runs, and then run read.pl.

Procedures are as follows, thank you!

#!/usr/bin/perl -w
use warnings;
use BerkeleyDB;
$|=1;
my $env=new BerkeleyDB::Env
    -Home=>'/home/www',
    -Flags=>DB_CREATE|DB_INIT_MPOOL
|| die;
my %hash;
my $db=tie(%hash,"BerkeleyDB::Btree",
       -Filename=>"test.db",
      -Flags=>DB_CREATE,
       -Env=>$env)
|| die;
for(1..30){
    $hash{$_}=$_;
    sleep 2;
}
untie $db;

[download]

#!/usr/bin/perl -w
use warnings;
use BerkeleyDB;
$|=1;

my $env=new BerkeleyDB::Env
    -Home=>'/home/www'
|| die;
my %hash;
my $db=tie(%hash,"BerkeleyDB::Btree",
       -Filename=>"test.db",
       -Env=>$env)
|| die;

my $k;
my $v;
my $cursor = $db->db_cursor();
while(1){
my $status=$cursor->c_get($k, $v, DB_NEXT);
if($status != 0){
    ;
}
else{
print "$k\t$v\n";
}
}

untie $db;

[download]

In reply to BerkeleyDB question by Perl_Love

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