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Full Discussion: BASH Execution Delay / Speedup
Top Forums Shell Programming and Scripting BASH Execution Delay / Speedup Post 302933405 by Don Cragun on Thursday 29th of January 2015 06:53:38 PM
Old 01-29-2015
Quote:
Originally Posted by gmark99
In my case, "my_job" does some database queries and decides to call a function that will result in a cross-processor message and then wait for a result to be returned.

I would still benefit from a lot of jobs in parallel if they're just waiting for results from another machine, right? This waiting for outside resources is the basic reason for my wanting to run so many jobs in background.

Am I missing anything, or am I on the right track?
Have you heard of denial of service attacks? Flooding a database server with more requests than it can handle doesn't speed things up; it grinds service to a halt.

We assume that you want to increase transaction throughput rather than to increase the loads on your CPUs, disks, networks, etc. Increased loads on system facilities is not linearly related to throughput. Increasing the load on a loaded (or overloaded) resource frequently reduces throughput rather than increasing it.
 

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LEARN ABOUT DEBIAN

kumostat

KUMOSTAT(1)						      General Commands Manual						       KUMOSTAT(1)

NAME

       kumostat - get kumofs status

SYNOPSIS

       kumostat server-address[:port=19800] command

       kumostat -m manager-address[:port=19700] command

DESCRIPTION

       Get status from Server node.

COMMANDS

       pid    get pid of server process

       uptime get uptime

       time   get UNIX time

       version
	      get version

       cmd_get
	      get total number of processed get requests

       cmd_set
	      get total number of processed set requests

       cmd_delete
	      get total number of processed delete requests

       items  get number of stored items

       rhs    get rhs (routing table for Get)

       whs    get whs (routing table for Set/Delete)

       hscheck
	      check if rhs == whs

       set_delay
	      maximize throughput at the expense of latency

       unset_delay
	      maximize throughput at the expense of latency

DELAY MODE

       If  the delay mode is enabled, req/sec throughput is maximized at the expense of latency. This mode actually disables TCP_NODELAY option of
       all sockets.  The practice of this feature is as following:

       - run some scripts that watches load of the kumo-server. (see source code of kumotop)

       - if the load of kumo-server becomes high, enable delay mode by kumostat set_delay command.

       - if the load of kumo-server becomes low, disable delay mode by kumostat unset_delay command.

EXAMPLE

       $ kumostat svr1 items

       $ kumotop -m mgr1 hscheck

SEE ALSO

       kumo-server(1).

kumostat							     July 2009							       KUMOSTAT(1)
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