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architecture guide: add disruptive incidents
This commit is contained in:
Thomas Schoebel-Theuer
parent
4113344afb
commit
3445817652
@ -187,7 +187,6 @@ reference "chap:GNU-FDL"
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\end_layout
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\begin_layout New Color Box Type
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\begin_inset Argument 2
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status open
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@ -236,7 +235,6 @@ thetcbcounter : #1
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\end_layout
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\begin_layout New Color Box Type
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\begin_inset Argument 2
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status open
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@ -285,7 +283,6 @@ thetcbcounter : #1
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\end_layout
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\begin_layout New Color Box Type
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\begin_inset Argument 2
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status open
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@ -334,7 +331,6 @@ thetcbcounter : #1
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\end_layout
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\begin_layout New Color Box Type
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\begin_inset Argument 2
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status open
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@ -2452,7 +2448,7 @@ costly ill-designs
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Some failure examples may be found in section
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\begin_inset CommandInset ref
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LatexCommand nameref
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reference "subsec:Example-Failures-of"
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reference "subsec:Example-Failures-Scalability"
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plural "false"
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caps "false"
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noprefix "false"
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@ -2925,7 +2921,7 @@ scalability problems
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early enough, see section
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\begin_inset CommandInset ref
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LatexCommand nameref
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reference "subsec:Example-Failures-of"
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reference "subsec:Example-Failures-Scalability"
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plural "false"
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caps "false"
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noprefix "false"
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@ -3012,7 +3008,7 @@ architectural
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ill-design (examples see section
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\begin_inset CommandInset ref
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LatexCommand nameref
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reference "subsec:Example-Failures-of"
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reference "subsec:Example-Failures-Scalability"
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plural "false"
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caps "false"
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noprefix "false"
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@ -5862,7 +5858,16 @@ name "sec:What-is-Scalability"
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\end_layout
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\begin_layout Standard
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If you know the zones from the following picture, you may skip this section:
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If you know the zones from the following picture, and if you know what the
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red
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\family sans
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\series bold
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\color red
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X
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\family default
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\series default
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\color inherit
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means, you may skip this section:
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\end_layout
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\begin_layout Standard
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@ -6045,7 +6050,7 @@ tightly coupled
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\emph default
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within their enclosure, for ordinary prices.
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Servers with more than 100 standard SMP CPUs are not extremely expensive,
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while even small loosely coupled
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anymore, while even small loosely coupled
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\series bold
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clusters
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\series default
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@ -7114,13 +7119,114 @@ examples
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\series bold
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important given context
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\series default
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(like the use case, your workload, etc) into account, as well as
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(like the use case, your workload, classes of customers, etc)
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\series bold
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and their distribution / amounts of resources
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\series default
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into account, as well as
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\series bold
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all relevant parameters
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\begin_inset Foot
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status open
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\begin_layout Plain Layout
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Be sure to check what is
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\emph on
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really
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\emph default
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given, and what is predicted by whom, and what is
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\emph on
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really
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\emph default
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required, and what is just a
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\begin_inset Quotes eld
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\end_inset
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wish
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\begin_inset Quotes erd
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\end_inset
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.
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\end_layout
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\end_inset
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\series default
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like TCO etc.
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\end_layout
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\begin_layout Plain Layout
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\noindent
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\begin_inset Graphics
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filename images/MatieresToxiques.png
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lyxscale 50
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scale 17
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\end_inset
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Do
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\series bold
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\emph on
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not
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\emph default
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assume linearity
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\series default
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in complex systems, consisting of a
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\emph on
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multitude
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\emph default
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of layers, and/or hundreds of software components needing
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\emph on
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runtime interactions
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\emph default
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, typically based on
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\series bold
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message passing
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\series default
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(e.g.
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over
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\emph on
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virtual
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\emph default
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networks).
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OOM or communication overload /
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\series bold
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queueing
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\series default
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/ deadlocks /
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\series bold
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self-amplification
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\series default
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/ message floods / etc aren't the only pitfalls.
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Real systems have
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\emph on
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many
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\emph default
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places where non-linear or
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\series bold
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disruptive behaviour
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\series default
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can appear under (sometimes
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\emph on
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unpredictable
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\emph default
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)
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\series bold
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side conditions
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\series default
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like (customer-induced) bugs, attacks, etc, which may
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\series bold
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spread out
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\series default
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(e.g.
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error propagation,
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\series bold
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incident propagation
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\series default
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, etc).
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\end_layout
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\end_inset
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@ -7202,7 +7308,33 @@ generic information
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\begin_layout Standard
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\noindent
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Once again, here is the picture of the important
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More
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\emph on
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examples
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\emph default
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, some of them showing
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\series bold
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fatal and/or disruptive incidents
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\series default
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, and even requiring (major)
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\series bold
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architectural changes
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\series default
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in their specific example use case, can be found in section
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\begin_inset CommandInset ref
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LatexCommand nameref
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reference "subsec:Example-Failures-Scalability"
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plural "false"
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caps "false"
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noprefix "false"
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\end_inset
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.
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\end_layout
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\begin_layout Standard
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Once again, here is the general picture of the important
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\series bold
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Zones of Scalability
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\series default
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@ -11785,7 +11917,7 @@ possible
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See the example story in section
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\begin_inset CommandInset ref
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LatexCommand nameref
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reference "subsec:Example-Failures-of"
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reference "subsec:Example-Failures-Scalability"
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plural "false"
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caps "false"
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noprefix "false"
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@ -20313,7 +20445,7 @@ Replication at filesystem level is often by single-file granularity.
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See also
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\begin_inset CommandInset ref
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LatexCommand nameref
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reference "subsec:Example-Failures-of"
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reference "subsec:Example-Failures-Scalability"
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plural "false"
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caps "false"
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noprefix "false"
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@ -25693,7 +25825,7 @@ noprefix "false"
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, or in
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\begin_inset CommandInset ref
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LatexCommand nameref
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reference "subsec:Example-Failures-of"
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reference "subsec:Example-Failures-Scalability"
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plural "false"
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caps "false"
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noprefix "false"
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@ -28019,7 +28151,7 @@ information bubbles
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Example Failures of Scalability
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\begin_inset CommandInset label
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LatexCommand label
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name "subsec:Example-Failures-of"
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name "subsec:Example-Failures-Scalability"
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\end_inset
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@ -29441,7 +29573,7 @@ packet loss
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\begin_inset CommandInset ref
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LatexCommand nameref
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reference "subsec:Example-Failures-of"
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reference "subsec:Example-Failures-Scalability"
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plural "false"
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caps "false"
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noprefix "false"
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@ -30421,7 +30553,7 @@ several
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Another project than mentioned in section
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\begin_inset CommandInset ref
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LatexCommand nameref
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reference "subsec:Example-Failures-of"
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reference "subsec:Example-Failures-Scalability"
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plural "false"
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caps "false"
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noprefix "false"
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@ -30589,7 +30721,7 @@ interactions
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, see example in section
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\begin_inset CommandInset ref
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LatexCommand nameref
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reference "subsec:Example-Failures-of"
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reference "subsec:Example-Failures-Scalability"
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plural "false"
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caps "false"
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noprefix "false"
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@ -30952,7 +31084,7 @@ must be scalable
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runtime behaviour is occuring (see section
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\begin_inset CommandInset ref
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LatexCommand nameref
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reference "subsec:Example-Failures-of"
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reference "subsec:Example-Failures-Scalability"
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plural "false"
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caps "false"
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noprefix "false"
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@ -47119,7 +47251,7 @@ false proofs
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See the failed scalability scenario in section
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\begin_inset CommandInset ref
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LatexCommand nameref
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reference "subsec:Example-Failures-of"
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reference "subsec:Example-Failures-Scalability"
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plural "false"
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caps "false"
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noprefix "false"
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@ -47726,7 +47858,7 @@ real
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When this doesn't help, read section
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\begin_inset CommandInset ref
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LatexCommand nameref
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reference "subsec:Example-Failures-of"
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reference "subsec:Example-Failures-Scalability"
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plural "false"
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caps "false"
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noprefix "false"
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@ -48499,7 +48631,7 @@ noprefix "false"
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) ill-design can be found in section
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\begin_inset CommandInset ref
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LatexCommand nameref
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reference "subsec:Example-Failures-of"
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reference "subsec:Example-Failures-Scalability"
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plural "false"
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caps "false"
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noprefix "false"
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@ -48677,7 +48809,7 @@ last resort
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See example in section
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\begin_inset CommandInset ref
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LatexCommand nameref
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reference "subsec:Example-Failures-of"
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reference "subsec:Example-Failures-Scalability"
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plural "false"
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caps "false"
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noprefix "false"
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@ -46,3 +46,4 @@ Single
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4 1 0 50 -1 18 12 0.0000 4 180 1050 5310 1620 Regression\001
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4 1 0 50 -1 18 12 0.0000 4 150 465 5265 1890 Zone\001
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4 1 4 50 -1 18 30 0.0000 4 270 270 6120 2160 x\001
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4 0 4 50 -1 18 9 1.5708 4 150 1470 6210 1890 Disruptive Incidents\001
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