-Requirements
-------------
+Overview
+--------
-. lustre OSS up and running
+This survey script does sequential I/O with varying numbers of threads and
+objects (files) by using lctl::test_brw to drive the echo_client connected
+to local or remote obdfilter instances, or remote obdecho instances.
+It can be used to characterise the performance of the following lustre
+components.
-Overview
---------
+1. The Stripe F/S.
+
+ Here the script directly exercises one or more instances of obdfilter.
+ They may be running on 1 or more nodes, e.g. when they are all attached
+ to the same multi-ported disk subsystem.
+
+ You need to tell the script all the names of the obdfilter instances.
+ These should be up and running already . If some are on different
+ nodes, you need to specify their hostnames too (e.g. node1:ost1).
+
+ All the obdfilter instances are driven directly. The script
+ automatically loads the obdecho module if required and creates one
+ instance of echo_client for each obdfilter instance.
-This survey may be used to characterise the performance of a lustre OSS.
-It can exercise the OSS either locally or remotely via the network.
+2. The Network.
-The script uses lctl::test_brw to drive the echo_client doing sequential
-I/O with varying numbers of threads and objects (files). One instance of
-lctl is spawned for each OST.
+ Here the script drives one or more instances of obdecho via instances of
+ echo_client running on 1 or more nodes.
+ You need to tell the script all the names of the echo_client instances.
+ These should already be up and running. If some are on different nodes,
+ you need to specify their hostnames too (e.g. node1:ECHO_node1).
+
+3. The Stripe F/S over the Network.
+ Here the script drives one or more instances of obdfilter via instances
+ of echo_client running on 1 or more nodes.
+
+ As with (2), you need to tell the script all the names of the
+ echo_client instances, which should already be up and running.
+
+Note that the script is _NOT_ scalable to 100s of nodes since it is only
+intended to measure individual servers, not the scalability of the system
+as a whole.
+
+
Running
-------
-The script must be customised according to the particular device under test
-and where it should keep its working files. Customisation variables are
+The script must be customised according to the components under test and
+where it should keep its working files. Customisation variables are
described clearly at the start of the script.
-When the script runs, it creates a number of working files and a pair of
-result files. All files start with the prefix given by ${rslt}.
-
-${rslt}_<date/time>.summary same as stdout
-${rslt}_<date/time>.detail_tmp* tmp files
-${rslt}_<date/time>.detail collected tmp files for post-mortem
-
-The script iterates over the given numbers of threads and objects
-performing all the specified tests and checking that all test processes
-completed successfully.
+If you are driving obdfilter instances directly, set the shell array
+variable 'ost_names' to the names of the obdfilter instances and leave
+'client_names' undefined.
+If you are driving obdfilter or obdecho instances over the network, you
+must instantiate the echo_clients yourself using lmc/lconf. Set the shell
+array variable 'client_names' to the names of the echo_client instances and
+leave 'ost_names' undefined.
-Local OSS
----------
+You can optionally prefix any name in 'ost_names' or 'client_names' with
+the hostname that it is running on (e.g. remote_node:ost4) if your
+obdfilters or echo_clients are running on more than one node. In this
+case, you need to ensure 'custom_remote_shell()' works on your cluster.
-To test a local OSS, setup 'ost_names' with the names of each OST. If you
-are unsure, do 'lctl device_list' and looks for obdfilter instanced e.g...
+Use 'lctl device_list' to verify the obdfilter/echo_client instance names
+e.g...
[root@ns9 root]# lctl device_list
0 UP confobd conf_ost3 OSD_ost3_ns9_UUID 1
3 AT confobd conf_ost12 OSD_ost12_ns9_UUID 1
[root@ns9 root]#
-Here device number 1 is an obdfilter instance called 'ost3'.
+...here device 1 is an instance of obdfilter called 'ost3'. To exercise it
+directly, add 'ns9:ost3' to 'ost_names'. If the script is only to be run
+on node 'ns9' you could simply add 'ost3' to 'ost_names'.
-The script configures an instance of echo_client for each name in ost_names
-and tears it down on normal completion. Note that it does NOT clean up
-properly (i.e. manual cleanup is required) if it is not allowed to run to
-completion.
+When the script runs, it creates a number of working files and a pair of
+result files. All files start with the prefix given by ${rslt}.
+${rslt}_<date/time>.summary same as stdout
+${rslt}_<date/time>.detail_tmp* tmp files
+${rslt}_<date/time>.detail collected tmp files for post-mortem
-Remote OSS
-----------
+The script iterates over the given numbers of threads and objects
+performing all the specified tests and checking that all test processes
+completed successfully.
-To test OSS performance over the network, you need to create a lustre
-configuration that creates echo_client instances for each OST.
+Note that the script does NOT clean up properly if it is aborted or if it
+encounters an unrecoverable error. In this case, manual cleanup may be
+required, possibly including killing any running instances of 'lctl' (local
+or remote), removing echo_client instances created by the script and
+unloading obdecho.
Script output
######################################################################
# customize per survey
-# specify either the obdecho client names or the obdfilter names
-client_names=()
-ost_names=(ost{1,2,3,4,5,6,7,8})
+# specify obd names (host:name if remote)
+# these can either be the echo_client names (client_names)
+# or the ost names (ost_names)
+#client_names=(ns8:ECHO_ns8 ns9:ECHO_ns9)
+ost_names=(ns9:ost{1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16})
-# result file prefix
-rslt=/tmp/obdfilter_survey
+# result file prefix (date/time + hostname makes unique)
+rslt=/home_nfs/eeb/obdfilter_survey_`date +%F@%R`_`uname -n`
-# lustre root (leave blank unless running with own source)
-lustre_root=
+# lustre root (if running with own source tree)
+lustre_root=/home_nfs/eeb/lustre
# what to do (we always do an initial write)
#tests="rewrite read reread rewrite_again"
tests="rewrite read"
-# total size (MBytes)
-# large enough to avoid cache effects
+# total size (MBytes) per OST
+# large enough to avoid cache effects
+# and to make test startup/shutdown overhead insignificant
size=8192
# record size (KBytes)
# number of objects per OST
nobjlo=1
-nobjhi=32
+nobjhi=512
# threads per OST (1024 max)
thrlo=1
-thrhi=128
+thrhi=64
# restart from here iff all are defined
restart_rsz=
# max buffer_mem (total_threads * buffer size)
# (to avoid lctl ENOMEM problems)
-max_buffer_mem=$((256*1024))
+max_buffer_mem=$((1024*1024))
+
+# how to run commands on other nodes
+custom_remote_shell () {
+ host=$1
+ shift
+ cmds="$*"
+ here=`pwd`
+ # Hop on to the remote node, chdir to 'here' and run the given
+ # commands. One of the following will probably work.
+ ssh $host "cd $here; $cmds"
+ #rsh $host "cd $here; $cmds"
+ #pdsh -w $host "cd $here; $cmds"
+}
#####################################################################
+# leave the rest of this alone unless you know what you're doing...
snap=1
verify=1
-check_obdecho() {
- lsmod | grep obdecho > /dev/null 2>&1
-}
-
-check_obdecho
-load_obdecho=$(($? != 0))
+rsltf="${rslt}.summary"
+workf="${rslt}.detail"
+echo -n > $rsltf
+echo -n > $workf
if [ -z "$lustre_root" ]; then
lctl=lctl
- if ((load_obdecho)); then
- modprobe obdecho
- fi
else
- lctl=${lustre_root}/lctl
- if ((load_obdecho)); then
- if [ -f ${lustre_root}/obdecho/obdecho.ko ]; then
- insmod ${lustre_root}/obdecho/obdecho.ko
- else
- insmod ${lustre_root}/obdecho/obdecho.o
- fi
- fi
+ lctl=${lustre_root}/utils/lctl
fi
-check_obdecho || (echo "Can't load obdecho"; exit 1)
+remote_shell () {
+ host=$1
+ shift
+ cmds="$*"
+ if [ "$host" = "localhost" -o "$host" = `uname -n` ]; then
+ eval "$cmds"
+ else
+ custom_remote_shell $host "$cmds"
+ fi
+}
+
+check_obdecho() {
+ local host=$1
+ remote_shell $host lsmod | grep obdecho > /dev/null 2>&1
+}
+
+load_obdecho () {
+ local host=$1
+ if [ -z "$lustre_root" ]; then
+ remote_shell $host modprobe obdecho
+ elif [ -f ${lustre_root}/obdecho/obdecho.ko ]; then
+ remote_shell $host insmod ${lustre_root}/obdecho/obdecho.ko
+ else
+ remote_shell $host insmod ${lustre_root}/obdecho/obdecho.o
+ fi
+}
+
+unload_obdecho () {
+ local host=$1
+ remote_shell $host rmmod obdecho
+}
get_devno () {
- local type=$1
- local name=$2
- $lctl device_list | awk "{if (\$2 == \"UP\" && \$3 == \"$type\" && \$4 == \"$name\") {\
- print \$1; exit}}"
+ local host=$1
+ local type=$2
+ local name=$3
+ remote_shell $host $lctl device_list | \
+ awk "{if (\$2 == \"UP\" && \$3 == \"$type\" && \$4 == \"$name\") {\
+ print \$1; exit}}"
}
get_ec_devno () {
- local idx=$1
- local client_name=${client_names[idx]}
- local ost_name=${ost_names[idx]}
+ local host=$1
+ local client_name="$2"
+ local ost_name="$3"
if [ -z "$client_name" ]; then
if [ -z "$ost_name" ]; then
echo "client and ost name both null" 1>&2
fi
client_name=${ost_name}_echo_client
fi
- ec=`get_devno echo_client $client_name`
+ ec=`get_devno $host echo_client $client_name`
if [ -n "$ec" ]; then
- echo $ec $client_name
+ echo $ec $client_name 0
return
fi
if [ -z "$ost_name" ]; then
echo "no echo client and ost_name not set" 1>&2
return
fi
- ost=`get_devno obdfilter $ost_name`
+ ost=`get_devno $host obdfilter $ost_name`
if [ -z "$ost" ]; then
echo "OST $ost_name not setup" 1>&2
return
fi
- $lctl <<EOF
+ remote_shell $host "$lctl <<EOF
attach echo_client $client_name ${client_name}_UUID
setup $ost_name
-EOF
- ec=`get_devno echo_client $client_name`
+EOF"
+ ec=`get_devno $host echo_client $client_name`
if [ -z "$ec" ]; then
echo "Can't setup echo client" 1>&2
return
}
teardown_ec_devno () {
- local idx=$1
- local client_name=${client_names[$idx]}
- if ((do_teardown_ec[$idx])); then
- $lctl <<EOF
+ local host=$1
+ local client_name=$2
+ remote_shell $host "$lctl <<EOF
cfg $client_name
cleanup
detach
-EOF
- fi
+EOF"
}
create_objects () {
# create a set of objects, check there are 'n' contiguous ones and
# return the first or 'ERROR'
- local devno=$1
- local nobj=$2
- local rfile=$3
- $lctl --device $devno create $nobj > $rfile 2>&1
+ local host=$1
+ local devno=$2
+ local nobj=$3
+ local rfile=$4
+ remote_shell $host $lctl --device $devno create $nobj > $rfile 2>&1
n=(`awk < $rfile \
'/is object id/ {obj=strtonum($6);\
first=!not_first; not_first=1;\
}
destroy_objects () {
- local devno=$1
- local obj0=$2
- local nobj=$3
- local rfile=$4
- $lctl --device $devno destroy $obj0 $nobj > $rfile 2>&1
+ local host=$1
+ local devno=$2
+ local obj0=$3
+ local nobj=$4
+ local rfile=$5
+ remote_shell $host $lctl --device $devno destroy $obj0 $nobj > $rfile 2>&1
}
get_stats () {
esac
}
-start=`date +%F@%R`
-rsltf="${rslt}_${start}.summary"
-echo -n > $rsltf
-workf="${rslt}_${start}.detail"
-echo -n > $workf
-
print_summary () {
if [ "$1" = "-n" ]; then
minusn=$1; shift
echo $minusn "$*"
}
+unique () {
+ echo "$@" | xargs -n1 echo | sort -u
+}
+
+split_hostname () {
+ name=$1
+ case $name in
+ *:*) host=`echo $name | sed 's/:.*$//'`
+ name=`echo $name | sed 's/[^:]*://'`
+ ;;
+ *) host=localhost
+ ;;
+ esac
+ echo "$host $name"
+}
+
ndevs=${#client_names[@]}
-if ((ndevs < ${#ost_names[@]} )); then
+if ((ndevs != 0)); then
+ if ((${#ost_names[@]} != 0)); then
+ echo "Please specify client_names or ost_names, but not both" 1>&2
+ exit 1
+ fi
+ for ((i=0; i<ndevs;i++)); do
+ str=(`split_hostname ${client_names[$i]}`)
+ host_names[$i]=${str[0]}
+ client_names[$i]=${str[1]}
+ done
+else
ndevs=${#ost_names[@]}
+ if ((ndevs == 0)); then
+ echo "Please specify either client_names or ost_names" 1>&2
+ exit 1
+ fi
+ for ((i=0; i<ndevs;i++)); do
+ str=(`split_hostname ${ost_names[$i]}`)
+ host_names[$i]=${str[0]}
+ ost_names[$i]=${str[1]}
+ done
fi
-for ((idx = 0; idx < ndevs; idx++)); do
- devno=(`get_ec_devno $idx`)
- if ((${#devno[@]} < 2)); then
- exit 1
+unique_hosts=(`unique ${host_names[@]}`)
+
+for host in ${unique_hosts[@]}; do
+ remote_shell $host "echo 0 > /proc/sys/portals/debug"
+ do_unload_obdecho[$host]=0
+ if check_obdecho $host; then
+ continue
fi
- devnos[$idx]=${devno[0]}
- client_names[$idx]=${devno[1]}
- do_teardown_ec[$idx]=$((${#devno[@]} > 2))
+ load_obdecho $host
+ if check_obdecho $host; then
+ do_unload_obdecho[$host]=0
+ continue
+ fi
+ echo "Can't load obdecho on $host" 1>&2
+ exit 1
done
-echo 0 > /proc/sys/portals/debug
+for ((i=0; i<ndevs; i++)); do
+ host=${host_names[$i]}
+ devno=(`get_ec_devno $host "${client_names[$i]}" "${ost_names[$i]}"`)
+ if ((${#devno[@]} != 3)); then
+ exit 1
+ fi
+ devnos[$i]=${devno[0]}
+ client_names[$i]=${devno[1]}
+ do_teardown_ec[$i]=${devno[2]}
+done
for ((rsz=$rszlo;rsz<=$rszhi;rsz*=2)); do
for ((nobj=$nobjlo;nobj<=$nobjhi;nobj*=2)); do
# create the objects
tmpf="${workf}_tmp"
for ((idx=0; idx < ndevs; idx++)); do
+ host=${host_names[$idx]}
devno=${devnos[$idx]}
- first_obj=`create_objects $devno $nobj $tmpf`
- echo "========> Create [$idx]" >> $workf
+ client_name="${host}:${client_names[$idx]}"
+ echo "=============> Create $nobj on $client_name" >> $workf
+ first_obj=`create_objects $host $devno $nobj $tmpf`
cat $tmpf >> $workf
rm $tmpf
if [ $first_obj = "ERROR" ]; then
- print_summary "created object #s [$idx] not contiguous"
+ print_summary "created object #s on $client_name not contiguous"
exit 1
fi
first_objs[$idx]=$first_obj
done
for test in write $tests; do
print_summary -n "$test "
- t0=`date +%s.%N`
+ for host in ${unique_hosts[@]}; do
+ echo -n > ${workf}_${host}_script
+ done
for ((idx=0; idx < ndevs; idx++)); do
+ host=${host_names[$idx]}
devno=${devnos[$idx]}
tmpfi="${tmpf}_$idx"
first_obj=${first_objs[$idx]}
- $lctl > $tmpfi 2>&1 \
- --threads $thr -$snap $devno \
- test_brw $count `testname2type $test` q $pages ${thr}t${first_obj} &
+ echo >> ${workf}_${host}_script \
+ "$lctl > $tmpfi 2>&1 \\
+ --threads $thr -$snap $devno \\
+ test_brw $count `testname2type $test` q $pages ${thr}t${first_obj} &"
+ done
+ for host in ${unique_hosts[@]}; do
+ echo "wait" >> ${workf}_${host}_script
+ done
+ t0=`date +%s.%N`
+ for host in ${unique_hosts[@]}; do
+ remote_shell $host bash ${workf}_${host}_script&
done
wait
t1=`date +%s.%N`
+ for host in ${unique_hosts[@]}; do
+ rm ${workf}_${host}_script
+ done
str=`awk "BEGIN {printf \"%7.2f \",\
$total_size / (( $t1 - $t0 ) * 1024)}"`
print_summary -n "$str"
echo -n > $tmpf
for ((idx=0; idx < ndevs; idx++)); do
+ client_name="${host_names[$idx]}:${client_names[$idx]}"
tmpfi="${tmpf}_$idx"
- echo "========> $test [$idx]" >> $workf
+ echo "=============> $test $client_name" >> $workf
cat $tmpfi >> $workf
get_stats $tmpfi >> $tmpf
rm $tmpfi
done
- echo "========> $test [$idx] global" >> $workf
+ echo "=============> $test global" >> $workf
cat $tmpf >> $workf
stats=(`get_global_stats $tmpf`)
rm $tmpf
str=`printf "%15s " SHORT`
fi
else
- str=`awk "BEGIN {printf \"[%6.2f,%6.2f] \",\
+ str=`awk "BEGIN {printf \"[%7.2f,%7.2f] \",\
(${stats[1]} * $actual_rsz)/1024,\
(${stats[2]} * $actual_rsz)/1024; exit}"`
fi
done
print_summary ""
for ((idx=0; idx < ndevs; idx++)); do
+ host=${host_names[$idx]}
devno=${devnos[$idx]}
+ client_name="${host}:${client_names[$idx]}"
first_obj=${first_objs[$idx]}
- destroy_objects $devno $first_obj $nobj $tmpf
- echo "========> Destroy [$idx]" >> $workf
+ echo "=============> Destroy $nobj on $client_name" >> $workf
+ destroy_objects $host $devno $first_obj $nobj $tmpf
cat $tmpf >> $workf
rm $tmpf
done
done
done
-for ((idx=0; idx < ndevs; idx++)); do
- teardown_ec_devno $idx
+for ((i=0; i<ndevs; i++)); do
+ host=${host_names[$i]}
+ if ((${do_teardown_ec[$i]})); then
+ teardown_ec_devno $host ${client_names[$i]}
+ fi
done
-if ((load_obdecho)); then
- rmmod obdecho
-fi
+for host in ${unique_hosts[@]}; do
+ if ((${do_unload_obdecho[$host]})); then
+ unload_obdecho $host
+ fi
+done
git://git.whamcloud.com / fs / lustre-release.git / commitdiff