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Shutdown server with glass environment

Ciao,

i have a Gemstone environment 3.1.0.6 running on an Ubuntu system.

On this system i use the Daemontools to start the Gemstone at the system startup ( https://github.com/Monty/GemStone_daemontools_setup )

Now my first question is:

when i shutdown the system with the linux command : shutdown -h 0

the gemstone environment is right stopped ?

Another question:

if the system power is suddenly less, what risk?

What should I do in this case ?

The gemstone environment may become unstable, do not start at the next starting ?

I can lose some transaction?

Thanks for some considerations,

Dario

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Re: Shutdown server with glass environment

Hi Dario, some quick answers.

On Fri, Sep 11, 2015 at 5:08 AM, Trussardi Dario Romano via Glass <[hidden email]> wrote:

Ciao,

i have a Gemstone environment 3.1.0.6 running on an Ubuntu system.

On this system i use the Daemontools to start the Gemstone at the system startup ( https://github.com/Monty/GemStone_daemontools_setup )

Now my first question is:

when i shutdown the system with the linux command : shutdown -h 0

the gemstone environment is right stopped ?

GemStone does quite good job at shutting down as cleaner as possible even when receiving a kill signal. So... i THINK the system *should* shutdown correctly at system shutdown. However, I have found some issues so I prefer to do it myself (mostly about existing lock files upon reboot). This is my init script:

#!/bin/bash

# Gemstone manager

# chkconfig: 345 96 01

# description: This is an init file for starting and stoping all stones. Monit is 98, so we want to start before.

# processname: Gemstone manager

#PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin

source /etc/environment

case "$1" in

start)

printf "%-50s" "Starting $NAME..."

find /opt/gemstone/locks/ -type f -not -name 'gemstone.hostid' -delete

/bin/bash /opt/gemstoneAdditions/scripts/startStonesAll.sh

/bin/bash /opt/gemstoneAdditions/scripts/startSeasideGemsAll.sh

#sleep 240

;;

status)

/opt/gemstone/product/bin/gslist -lcv

;;

stop)

printf "%-50s" "Stopping $NAME"

/bin/bash /opt/gemstoneAdditions/scripts/stopStonesAll.sh

;;

restart)

$0 stop

$0 start

;;

echo "Usage: $0 {status|start|stop|restart}"

exit 1

esac

exit 0

Another question:

if the system power is suddenly less, what risk?

What should I do in this case ?

Remove lock files as I do at OS start !!!

The gemstone environment may become unstable, do not start at the next starting ?

I can lose some transaction?

TooManyQuestionsException ;) Read the admin guide about system crash recovery and transaction logs. As a general point, you don't loose any transaction. At reboot, GemStone may realize that it was not a clean shutdown and may recover from tranlogs (the stone start will take some time). In some cases you may also need to start stone with -R. Of course if it was a abrupt shutdown (electricity shutdown for example) I THINK the tranlog may be corrupted too if you were just writing it at the time of the crash but it's less likely. So in that case things are a bit more complicated I imagine.

Thanks for some considerations,

Dario

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Mariano
http://marianopeck.wordpress.com

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