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SubjectRe: Filesystem benchmarks: ext2 vs ext3 vs jfs vs minix
On Wed, 27 Mar 2002, Andrew Morton wrote:

> > tuning? single ir mx-ir oltp mixed-oltp
> > (sec) (tps) (sec) (tps) (sec)
> > ext3 bn 1285.32 65.98 1996.41 90.05 307.79
> > ext3-wb bn 1287.31 98.42 2149.38 125.13 236.02
> > ext3-jd bn 1306.90 72.07 1813.54 125.15 305.27
>
> Oh well.

Sometimes better, sometimes worse. I'll kick another run
off tonight, to check that the numbers aren't too far off.

> It sounds like a useful and valid workload to optimise
> for. So I'll take you up on the offer of those scripts,
> please.

My scripts are roughly the appended, and:

grep -E '(agg_simple|Bench|crossSe|Mixed|"Sin)' dbb-tuned.out | \
sed 's/^crossSection/cS/'

I've been too lazy so far to automate the "make it into a
table" bit, particularly because I quite like watching the
results come in :)

Cheers,
Matthew.



#!perl -w
use strict;

my $PART = '/dev/sdb6';
my $FORCEOPTS = 'noatime';
my $DEFOPTS = undef;
my $DEBUG = 1;
my $DEBUGONLY = 0;

my @FSES = qw(jfs ext3 ext3-wb ext3-jd minix ext2);
my @DBS = qw(postgresql);

my @BENCHOPTS = qw(--datadir /home/matthew/dbbench/data-40mb --short);

my %filesystems = (
minix => { mkfs => [ qw(/root/mkfs.minix -v) ], },
ext2 => {},
ext3 => {},
'ext3-wb' => { type => 'ext3', mountopts => 'data=writeback', },
'ext3-jd' => { mkfs => [ qw(mkfs.ext3 -J size=200 )],
type => 'ext3', mountopts => 'data=journal', },
jfs => { mkfs => [ qw(mkfs.jfs -q) ], },
reiser => { type => 'reiserfs', },
);

my %dbs = (
mysql => { mntpoint => '/var/lib/mysql', osdb => 'osdb-my', },
postgresql => { mntpoint => '/var/lib/pgsql', osdb => 'osdb-pg',
init => \&pg_init, },
);

runit('umount', $PART);

foreach my $db (@DBS) {
my $dbopts = $dbs{$db};
my $mntpoint = $dbopts->{mntpoint} or die "$db has no mntpoint\n";
my $osdb = $dbopts->{osdb} or die "$db has no \"osdb\"\n";

foreach my $fs (@FSES) {
my $opts = $filesystems{$fs};
print "Benchmark for ", $db, " on ", $fs, "\n\n";

my $fstype = $opts->{type} || $fs;
my $mkfs = $opts->{mkfs} || [ qw(mkfs -t), $fstype ];
print "making fs\n";
runit(@$mkfs, $PART) or die "can't mkfs $fstype\n";
print "\n\n";

print "mounting fs\n";
my $opt = $opts->{mountopts} || $DEFOPTS;
$opt = [$opt] if $opt && ! ref $opt;
push @$opt, $FORCEOPTS;
$opt = join(",", @$opt);
$opt = ['-o', $opt] if $opt;
runit('mount', '-t', $fstype, @$opt, $PART, $mntpoint)
or die "can't mount $fstype\n";
print "\n\n";

print "Starting ", $db, "\n";
if ($dbopts->{init}) {
&{$dbopts->{init}}($dbopts, $opts);
} else {
runit('/sbin/service', $db, 'start');
}
print "\n\n";

print "Running test\n";
runit($osdb, @BENCHOPTS) or warn "tests failed\n";
print "\n\n";

print "Stopping ", $db, "\n";
runit('/sbin/service', $db, 'stop');
sleep(2);
print "\n\n";

print "Umounting\n";
runit('umount', $PART) or die "can't umount $fstype\n";
print "\n\n";

print "\n\n";
print "\n\n";
}
}


exit;



sub pg_init {
my $dbopts = shift;
my $opts = shift;
my $mp = $dbopts->{mntpoint};

my @dirs = ($mp.'/data', $mp.'/backups');
runit('mkdir', '-m', '0700', @dirs);
runit('chown', 'postgres.postgres', @dirs);
# runit('cp', '/etc/postgresql.conf', $dirs[0]);
runit('/sbin/service', 'postgresql', 'start');
sleep(2);
runit('sudo', '-u', 'postgres', 'createuser', '-a', '-d', 'root');
}

sub runit {
print join(" ", @_), "\n" if $DEBUG || $DEBUGONLY;
return !system(@_) unless $DEBUGONLY;
}

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