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doc: improve geo-redundancy
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Thomas Schoebel-Theuer
Thomas Schoebel-Theuer
parent
39188bb175
commit
b9552141c6
@ -4988,74 +4988,6 @@ core business
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\end_inset
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\end_layout
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\begin_layout Standard
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\noindent
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\begin_inset Flex Custom Color Box 3
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status open
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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/lightbulb_brightlit_benj_.png
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lyxscale 9
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scale 5
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\end_inset
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Notice that the same family of requirements can be solved
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\emph on
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very
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\emph default
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differently.
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This guide explains ways for both
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\series bold
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cost reduction
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\series default
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and
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\series bold
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risk reduction
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\series default
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at the same time, by
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\emph on
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combining
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\emph default
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HA requirements with geo-redundancy requirements in a clever way, such
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that the combined solution will meet both at the same time.
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A resulting combined solution is called
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\series bold
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Football on top of MARS
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\series default
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.
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It provides additional operational value, such as load balancing via the
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\series bold
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ability for butterfly
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\series default
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, see section
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\begin_inset CommandInset ref
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LatexCommand nameref
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reference "subsec:Flexibility-of-Failover"
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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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\end_inset
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\end_layout
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\begin_layout Standard
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\begin_inset VSpace defskip
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\end_inset
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\end_layout
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\begin_layout Standard
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@ -5333,11 +5265,56 @@ There are some ongoing political discussions about detail requirements for
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The mimimum distance requirement between suitable geo-locations is seen
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differently by different interest groups, and even differently in different
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countries.
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Background are the
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Some backgrounds:
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\end_layout
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\begin_layout Itemize
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\noindent
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The
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\series bold
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enormous cost
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\series default
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for setup of a datacenter.
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for setup of a new datacenter.
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\end_layout
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\begin_layout Itemize
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\noindent
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Several
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\emph on
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commerical
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\emph default
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geo-redundancy solution
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\emph on
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components
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\emph default
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are
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\series bold
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more expensive
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\series default
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with increasing geo-distance, sometimes by
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\emph on
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factors
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\emph default
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, or even
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\emph on
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unapplicable
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\emph default
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at all for longer distances (e.g.
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bad historical experiences with
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\begin_inset Formula $>50$
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\end_inset
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km), while another OpenSource component like MARS does not functionally
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depend on
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\emph on
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arbitrary
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\emph default
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geo distances
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\emph on
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by construction
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\emph default
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.
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\end_layout
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\begin_layout Standard
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@ -5397,6 +5374,94 @@ international requirements
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course of the next decades.
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\end_layout
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\begin_layout Standard
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\begin_inset VSpace defskip
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\end_inset
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\end_layout
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\begin_layout Standard
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\noindent
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\begin_inset Flex Custom Color Box 3
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status open
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\begin_layout Plain Layout
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\noindent
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\begin_inset Argument 1
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status open
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\begin_layout Plain Layout
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\series bold
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Opportunities
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\end_layout
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\end_inset
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\begin_inset Graphics
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filename images/lightbulb_brightlit_benj_.png
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lyxscale 9
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scale 5
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\end_inset
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Notice that not only the same family of requirements can be solved
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\emph on
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very
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\emph default
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differently, but also some
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\emph on
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combinations of different requirements
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\emph default
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.
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This guide explains ways for both
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\series bold
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cost reduction
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\series default
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and
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\series bold
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risk reduction
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\series default
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at the same time, by
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\emph on
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combining
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\emph default
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HA requirements with geo-redundancy requirements in a clever way, such
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that the combined solution will meet both at the same time.
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\end_layout
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\begin_layout Plain Layout
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\noindent
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Example: a resulting combined solution is called
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\series bold
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Football on top of MARS
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\series default
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.
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It provides additional operational value, such as load balancing via the
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\series bold
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ability for butterfly
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\series default
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, see section
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\begin_inset CommandInset ref
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LatexCommand nameref
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reference "subsec:Flexibility-of-Failover"
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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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\end_inset
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\end_layout
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\begin_layout Section
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What is
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\emph on
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