Package: enhanceio
Version: 0+git20130620-1
Severity: wishlist
Hello,
I have writen a quick'n'dirty init script for EnhanceIO.
On start, it checks if EnhanceIO may have been active already by looking for
its udev script.
If not, if sources its configuration from /etc/default/enhanceio and brings up
the cache.
On stop, it switches the cache to read-only and blocks till all changes have
been written to disk.
Afterwards it deletes the cache.
Cheers,
Unki
-- System Information:
Debian Release: 7.3
APT prefers stable
APT policy: (990, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 3.2.0-4-amd64 (SMP w/3 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
# /etc/default/enhanceio
# define cache using the following syntax
#
# SRCDEV,CACHEDEV,MODE,NAME
#
# - SRCDEV source device that shall be cached
# - CACHEDEV device to be used as cache
# - MODE wb (writeback), wt (writethru) or ro (read-only)
# - NAME a name for the cache
#
# multiple caches can be enter separated by a blank"
#
# Example: CACHES="/dev/sdb,/dev/sdc,wb,ssdcache1
/dev/sdd,/dev/sde/ro,ssdcache2"
CACHES="/dev/sdb,/dev/sdc,wb,ssdcache"
# if you want to change some of the default values of EnhanceIO
# uncomment what you need
# Dirty high threshold (%) : The upper limit on percentage of dirty blocks in
the entire cache.
DIRTY_HIGH_THRESHOLD=10
# Dirty low threshold (%) : The lower limit on percentage of dirty blocks in
the entire cache.
DIRTY_LOW_THRESHOLD=2
# Dirty set high threshold (%) : The upper limit on percentage of dirty blocks
in a set.
DIRTY_SET_HIGH_THRESHOLD=50
# Dirty set low threshold (%) : The lower limit on percentage of dirty blocks
in a set.
DIRTY_SET_LOW_THRESHOLD=10
# Time based clean-up interval (minutes) : This option allows you to specify an
interval between each clean-up process.
TIME_BASED_CLEAN_INTERVAL=1
#!/bin/bash
#
# Written by Andreas Unterkircher <u...@netshadow.at>.
### BEGIN INIT INFO
# Provides: enhanceio
# Required-Start: $remote_fs $syslog
# Required-Stop: $remote_fs $syslog
# Should-Start:
# Should-Stop:
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: EnhanceIO SSD Caching
# Description: a software to use a SSD drive as read/write cache
### END INIT INFO
set -e
test -x /usr/sbin/eio_cli || exit 0
. /lib/lsb/init-functions
[ -f /etc/default/enhanceio ] && . /etc/default/enhanceio
start_enhanceio()
{
if [ -f /etc/udev/rules.d/94-enhanceio-ssdcache.rules ]; then
log_progress_msg "looks like udev is doing our job"
return
fi
for CACHE in "$CACHES"; do
IFS=, read SRCDEV CACHEDEV MODE NAME <<< "$CACHE"
log_progress_msg "($NAME) caching $SRCDEV on $CACHEDEV in mode $MODE"
/usr/sbin/eio_cli create -d $SRCDEV -s $CACHEDEV -m $MODE -c $NAME
if [ ! -z $DIRTY_HIGH_THRESHOLD ]; then
sysctl -w dev.enhanceio.$NAME.dirty_high_threshold=$DIRTY_HIGH_THRESHOLD
fi
if [ ! -z $DIRTY_LOW_THRESHOLD ]; then
sysctl -w dev.enhanceio.$NAME.dirty_low_threshold=$DIRTY_LOW_THRESHOLD
fi
if [ ! -z $DIRTY_SET_HIGH_THRESHOLD ]; then
sysctl -w dev.enhanceio.$NAME.dirty_set_high_threshold=$DIRTY_SET_HIGH_THRESHOLD
fi
if [ ! -z $DIRTY_SET_LOW_THRESHOLD ]; then
sysctl -w dev.enhanceio.$NAME.dirty_set_low_threshold=$DIRTY_SET_LOW_THRESHOLD
fi
if [ ! -z $TIME_BASED_CLEAN_INTERVAL ]; then
sysctl -w dev.enhanceio.$NAME.time_based_clean_interval=$TIME_BASED_CLEAN_INTERVAL
fi
done
}
stop_enhanceio()
{
test -d /proc/enhanceio || exit 0;
for CACHE in `ls -1d /proc/enhanceio/*`; do
CACHENAME=`basename $CACHE`
if [ "${CACHENAME}" == "version" ]; then
continue;
fi
log_progress_msg "disabling $CACHENAME"
/usr/sbin/eio_cli edit -c $CACHENAME -m ro
/usr/sbin/eio_cli delete -c $CACHENAME
done
}
status()
{
test -d /proc/enhanceio || ( echo "EnhanceIO not loaded"; exit 1; )
for CACHE in `ls -1d /proc/enhanceio/*`; do
CACHENAME=`basename $CACHE`
if [ "${CACHENAME}" == "version" ]; then
continue;
fi
STATE=`grep ^state $CACHE/config | awk '{ print $2 }'`
log_action_begin_msg "state $CACHENAME: "
if [ "$STATE" != "normal" ]; then
log_action_end_msg 1 "$STATE"
else
log_action_end_msg 0 "ok"
fi
done
}
case "$1" in
start)
log_daemon_msg "Starting EnhanceIO"
start_enhanceio
log_end_msg 0
;;
stop)
log_daemon_msg "Stopping EnhanceIO"
stop_enhanceio
log_end_msg 0
;;
restart)
log_daemon_msg "Stopping EnhanceIO for restart"
stop_exim
log_end_msg 0
sleep 2
log_daemon_msg "Restarting EnhanceIO"
start_exim
log_end_msg 0
;;
status)
status
;;
*)
echo "Usage: $0 {start|stop|restart|status}"
exit 1
;;
esac
exit 0
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