R/usl-package.R

# Copyright (c) 2013-2020 Stefan Moeding
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.


##############################################################################
#' Analyze system scalability with the Universal Scalability Law
#'
#' The Universal Scalability Law is a model to predict hardware and software
#' scalability. It uses system capacity as a function of load to forecast the
#' scalability for the system.
#'
#' Use the function \code{\link{usl}} to create a model from a formula and
#' a data frame.
#'
#' The USL model produces two coefficients as result: \code{alpha} models the
#' contention and \code{beta} the coherency delay of the system.
#'
#' The Universal Scalability Law has been created by Dr. Neil J. Gunther.
#'
#' @seealso \code{\link{usl}}
#'
#' @references Neil J. Gunther. Guerrilla Capacity Planning: A Tactical
#'   Approach to Planning for Highly Scalable Applications and Services.
#'   Springer, Heidelberg, Germany, 1st edition, 2007.
#'
#' @name usl-package
#' @docType package
#' @import methods
#' @import graphics
#' @import stats
#'
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usl documentation built on Aug. 29, 2022, 1:06 a.m.