[weewx-user] Re: RAM disc for web server data
I wrote:
Killing three birds with one stone ... I have an init script
(attached) that:
OFFFS ... first post and I screw up by failing to attach the script
R
--
R A Lichtensteiger
“Don’t make something unless it is both necessary and useful; but if it is
both necessary and useful, don’t hesitate to make it beautiful.”
—Shaker philosophy
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#!/bin/sh
# Startup script to sync to/from a ramdisk for WeeWX for Debian derivatives
#
### BEGIN INIT INFO
# Provides: weewx-ramdisk
# Required-Start:$local_fs $remote_fs $syslog $time
# Required-Stop: $local_fs $remote_fs $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: weewx weather system ramdisk
# Description: Manages a ramdisk for the web output of weewx
### END INIT INFO
# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC="weewx weather system ramdisk"
NAME=weewx-ramdisk
TARGET="/var/www/weather"
BACKUP="/var/backups/weewx-webdir"
LOGFILE="/var/log/weewx/webdir-sync.log"
RSYNC_BIN="/usr/bin/rsync"
# Read configuration variable file if it is present
[ -r /etc/default/$NAME ] && . /etc/default/$NAME
# Exit if the rsync package is not installed
[ -x "$RSYNC_BIN" ] || exit 0
# Load the VERBOSE setting and other rcS variables
. /lib/init/vars.sh
# Define LSB log_* functions.
# Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
. /lib/lsb/init-functions
if [ "$START_WEEWX" = no ]
then
log_action_msg "Not starting $DESC, see /etc/default/$NAME"
exit 0
fi
case "$1" in
start)
echo "Copying files to ramdisk"
$RSYNC_BIN -av ${BACKUP}/ ${TARGET}/
echo [`date +"%Y-%m-%d %H:%M"`] Ramdisk restored from HD >> ${LOGFILE}
;;
stop|sync|reload)
echo "Synching files from ramdisk to Harddisk"
echo [`date +"%Y-%m-%d %H:%M"`] Ramdisk backed up to HD >> ${LOGFILE}
$RSYNC_BIN -av --delete --recursive --force ${TARGET}/ ${BACKUP}/
;;
*)
echo "Usage: /etc/init.d/$NAME {start|stop|sync|reload}"
exit 1
;;
esac
exit 0
[weewx-user] Re: RAM disc for web server data
("Long time listener, first time caller")
vince wrote:
On Wednesday, July 24, 2019 at 6:55:42 AM UTC-7, James Muirhead wrote
As the web server data is written to the SD every 5 minutes, I felt it
would be appropriate to create a RAM disc for it. Should, in theory,
improve lifespan of the SD card.
[...]
One thing you might think about is stashing your NOAA files to disk
periodically (couple times a day) and restoring them, as they take a long
time to regenerate as you get more and more data. The other stuff will
regenerate quickly on firstboot of course.
Like many, I stumbled onto the tmpfs ram drive solution a while ago.
Killing three birds with one stone ... I have an init script
(attached) that:
o Backs up the web directory on shutdown or when called with
"sync" or "reload"
o Restores the web directory on startup
Cron entry runs the "sync" nightly, the other two modes are self
explanatory.
R
People using systemd are on their own
--
R A Lichtensteiger
Power corrupts. Absolute power corrupts absolutely. But it rocks
absolutely, too.
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