只升级mongodb的版本极为简单，更新/替换 bin/目录下的可执行文件即可。
debian和osx上的升级，按步骤来，没什么好说的。
http://docs.mongodb.org/manual/tutorial/install-mongodb-on-debian/
切换引擎就麻烦了，新引擎的性能很诱人。
对迁移引擎来说，最大的问题是文件格式不兼容
也就是说，得把旧数据全部重新导一遍。
实现方式是设旧引擎数据库为master
设新引擎数据库为slaver
执行数据同步
旧引擎库
# mongod.conf dbpath=/hdd3/mongodb logpath=/var/log/mongodb/mongod_audit.log logappend=true port = 27017 bind_ip=127.0.0.1 master=true
新引擎库
# mongod_audit_wiredtiger.conf dbpath=/hdd3/mongodb_wiredtiger logpath=/var/log/mongodb/mongod_audit_wiredTiger.log logappend=true port = 27030 bind_ip=127.0.0.1 storageEngine=wiredTiger slave=true source=127.0.0.1:27017
/etc/init.d/mongod_audit_wiredTiger
#!/bin/sh # # init.d script with LSB support. # # Copyright (c) 2007 Javier Fernandez-Sanguino <jfs@debian.org> # # This is free software; you may 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, # or (at your option) any later version. # # This 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 with # the Debian operating system, in /usr/share/common-licenses/GPL; if # not, write to the Free Software Foundation, Inc., 59 Temple Place, # Suite 330, Boston, MA 02111-1307 USA # ### BEGIN INIT INFO # Provides: mongod_audit_wiretiger # Required-Start: $network $local_fs $remote_fs # Required-Stop: $network $local_fs $remote_fs # Should-Start: $named # Should-Stop: # Default-Start: 2 3 4 5 # Default-Stop: 0 1 6 # Short-Description: An object/document-oriented database # Description: MongoDB is a high-performance, open source, schema-free # document-oriented data store that's easy to deploy, manage # and use. It's network accessible, written in C++ and offers # the following features: # # * Collection oriented storage - easy storage of object- # style data # * Full index support, including on inner objects # * Query profiling # * Replication and fail-over support # * Efficient storage of binary data including large # objects (e.g. videos) # * Automatic partitioning for cloud-level scalability # # High performance, scalability, and reasonable depth of # functionality are the goals for the project. ### END INIT INFO PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin DAEMON=/usr/bin/mongod DESC=database_audit NAME=mongod_audit_wiredtiger # Defaults. Can be overridden by the /etc/default/$NAME # Other configuration options are located in $CONF file. See here for more: # http://dochub.mongodb.org/core/configurationoptions CONF=/etc/mongod_audit_wiredtiger.conf PIDFILE=/var/run/$NAME.pid ENABLE_MONGOD=yes # Include mongodb defaults if available if [ -f /etc/default/$NAME ] ; then . /etc/default/$NAME fi # Handle NUMA access to CPUs (SERVER-3574) # This verifies the existence of numactl as well as testing that the command works NUMACTL_ARGS="--interleave=all" if which numactl >/dev/null 2>/dev/null && numactl $NUMACTL_ARGS ls / >/dev/null 2>/dev/null then NUMACTL="`which numactl` -- $NUMACTL_ARGS" DAEMON_OPTS=${DAEMON_OPTS:-"--config $CONF"} else NUMACTL="" DAEMON_OPTS="-- "${DAEMON_OPTS:-"--config $CONF"} fi if test ! -x $DAEMON; then echo "Could not find $DAEMON" exit 0 fi if test "x$ENABLE_MONGOD" != "xyes"; then exit 0 fi . /lib/lsb/init-functions STARTTIME=1 DIETIME=10 # Time to wait for the server to die, in seconds # If this value is set too low you might not # let some servers to die gracefully and # 'restart' will not work DAEMONUSER=${DAEMONUSER:-mongodb} set -e running_pid() { # Check if a given process pid's cmdline matches a given name pid=$1 name=$2 [ -z "$pid" ] && return 1 [ ! -d /proc/$pid ] && return 1 cmd=`cat /proc/$pid/cmdline | tr " 00" " "|head -n 1 |cut -d : -f 1` # Is this the expected server [ "$cmd" != "$name" ] && return 1 return 0 } running() { # Check if the process is running looking at /proc # (works for all users) # No pidfile, probably no daemon present [ ! -f "$PIDFILE" ] && return 1 pid=`cat $PIDFILE` running_pid $pid $DAEMON || return 1 return 0 } start_server() { # Recommended ulimit values for mongod or mongos # See http://docs.mongodb.org/manual/reference/ulimit/#recommended-settings # ulimit -f unlimited ulimit -t unlimited ulimit -v unlimited ulimit -n 64000 ulimit -m unlimited # In dash, ulimit takes -p for maximum user processes # In bash, it's -u if readlink /proc/$$/exe | grep -q dash then ulimit -p 32000 else ulimit -u 32000 fi # Start the process using the wrapper start-stop-daemon --background --start --quiet --pidfile $PIDFILE --make-pidfile --chuid $DAEMONUSER --exec $NUMACTL $DAEMON $DAEMON_OPTS errcode=$? return $errcode } stop_server() { # Stop the process using the wrapper start-stop-daemon --stop --quiet --pidfile $PIDFILE --retry 300 --user $DAEMONUSER --exec $DAEMON errcode=$? return $errcode } force_stop() { # Force the process to die killing it manually [ ! -e "$PIDFILE" ] && return if running ; then kill -15 $pid # Is it really dead? sleep "$DIETIME"s if running ; then kill -9 $pid sleep "$DIETIME"s if running ; then echo "Cannot kill $NAME (pid=$pid)!" exit 1 fi fi fi rm -f $PIDFILE } case "$1" in start) log_daemon_msg "Starting $DESC" "$NAME" # Check if it's running first if running ; then log_progress_msg "apparently already running" log_end_msg 0 exit 0 fi if start_server ; then # NOTE: Some servers might die some time after they start, # this code will detect this issue if STARTTIME is set # to a reasonable value [ -n "$STARTTIME" ] && sleep $STARTTIME # Wait some time if running ; then # It's ok, the server started and is running log_end_msg 0 else # It is not running after we did start log_end_msg 1 fi else # Either we could not start it log_end_msg 1 fi ;; stop) log_daemon_msg "Stopping $DESC" "$NAME" if running ; then # Only stop the server if we see it running errcode=0 stop_server || errcode=$? log_end_msg $errcode else # If it's not running don't do anything log_progress_msg "apparently not running" log_end_msg 0 exit 0 fi ;; force-stop) # First try to stop gracefully the program $0 stop if running; then # If it's still running try to kill it more forcefully log_daemon_msg "Stopping (force) $DESC" "$NAME" errcode=0 force_stop || errcode=$? log_end_msg $errcode fi ;; restart|force-reload) log_daemon_msg "Restarting $DESC" "$NAME" errcode=0 stop_server || errcode=$? # Wait some sensible amount, some server need this [ -n "$DIETIME" ] && sleep $DIETIME start_server || errcode=$? [ -n "$STARTTIME" ] && sleep $STARTTIME running || errcode=$? log_end_msg $errcode ;; status) log_daemon_msg "Checking status of $DESC" "$NAME" if running ; then log_progress_msg "running" log_end_msg 0 else log_progress_msg "apparently not running" log_end_msg 1 exit 1 fi ;; # MongoDB can't reload its configuration. reload) log_warning_msg "Reloading $NAME daemon: not implemented, as the daemon" log_warning_msg "cannot re-read the config file (use restart)." ;; *) N=/etc/init.d/$NAME echo "Usage: $N {start|stop|force-stop|restart|force-reload|status}" >&2 exit 1 ;; esac exit 0