12-29-2018
You should know the answer to the following questions before you start.
What effect does increasing the block size from 8192 to 32768 have?
What percentage of disk i/o capacity does a step take? You can use sar to determine this. and from this you should be able to calculate the number of megabytes per hour that you can process at a given disk usage threshold.
Pick two or three of the largest tables and manually run them in series. Record the wall clock time. Run them again in parallel and record the wall clock time. If you have other users on the system while you are running this experiment. record the response times when running serial and parallel.
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LEARN ABOUT LINUX
service
service(8) System Manager's Manual service(8)
NAME
service - run a System V init script
SYNOPSIS
service SCRIPT COMMAND [OPTIONS]
service --status-all
service --help | -h | --version
DESCRIPTION
service runs a System V init script in as predictable environment as possible, removing most environment variables and with current working
directory set to /.
The SCRIPT parameter specifies a System V init script, located in /etc/init.d/SCRIPT. The supported values of COMMAND depend on the
invoked script, service passes COMMAND and OPTIONS it to the init script unmodified. All scripts should support at least the start and
stop commands. As a special case, if COMMAND is --full-restart, the script is run twice, first with the stop command, then with the start
command.
service --status-all runs all init scripts, in alphabetical order, with the status command.
EXIT CODES
service calls the init script and returns the status returned by it.
FILES
/etc/init.d
The directory containing System V init scripts.
ENVIRONMENT
LANG, TERM
The only environment variables passed to the init scripts.
SEE ALSO
/etc/init.d/skeleton,
update-rc.d(8),
init(8),
invoke-rc.d(8).
Jan 2006 service(8)