mirror of https://github.com/schoebel/mars
arch-guide: move replication vs backup
This commit is contained in:
Thomas Schoebel-Theuer
Thomas Schoebel-Theuer
parent
a0c448b421
commit
b2092e3d51
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@ -1232,6 +1232,278 @@ reach
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.
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\end_layout
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\begin_layout Section
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Replication vs Backup
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\begin_inset CommandInset label
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LatexCommand label
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name "sec:Replication-vs-Backup"
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\end_inset
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\end_layout
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\begin_layout Standard
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Intuitively, data backup and data replication are two different solution
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classes, addressing different problems.
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\end_layout
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\begin_layout Standard
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However, there exist descriptions where both solution classes are overlapping,
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as well as their corresponding problem classes.
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For example, backup as explained in
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\begin_inset Flex URL
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status open
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\begin_layout Plain Layout
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https://en.wikipedia.org/wiki/Backup
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\end_layout
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\end_inset
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could be seen as also encompassing some types of storage replications explained
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in
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\begin_inset Flex URL
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status open
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\begin_layout Plain Layout
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https://en.wikipedia.org/wiki/Replication_(computing)
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\end_layout
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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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For a rough comparison of
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\emph on
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typical
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\emph default
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implementations, see the following
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\emph on
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typical
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\emph default
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differences:
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\end_layout
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\begin_layout Standard
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\noindent
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\align center
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\begin_inset Tabular
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<lyxtabular version="3" rows="6" columns="3">
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<features tabularvalignment="middle">
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<column alignment="left" valignment="top">
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<column alignment="center" valignment="top">
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<column alignment="center" valignment="top">
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<row>
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<cell alignment="left" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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\end_layout
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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Backup
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\end_layout
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" rightline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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Replication
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\end_layout
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\end_inset
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</cell>
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</row>
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<row>
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<cell alignment="left" valignment="top" topline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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Fast handover (planned)
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\end_layout
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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no, or cumbersome
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\end_layout
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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yes
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\end_layout
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\end_inset
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</cell>
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</row>
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<row>
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<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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Fast failover (unplanned)
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\end_layout
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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no, or cumbersome
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\end_layout
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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yes
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\end_layout
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\end_inset
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</cell>
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</row>
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<row>
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<cell alignment="left" valignment="top" topline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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Protect for physical failures
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\end_layout
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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yes
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\end_layout
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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yes
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\end_layout
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\end_inset
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</cell>
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</row>
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<row>
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<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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Protect for logical data corruption
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\end_layout
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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yes (partly)
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\end_layout
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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typically no
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\end_layout
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\end_inset
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</cell>
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</row>
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<row>
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<cell alignment="left" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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Disaster Recovery Time (MTTR)
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\end_layout
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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typically (very) slow
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\end_layout
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" rightline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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fast
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\end_layout
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\end_inset
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</cell>
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</row>
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</lyxtabular>
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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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Because of these typical differences, enterprise-critical data typically
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deserves
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\emph on
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both
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\emph default
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solution classes.
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\end_layout
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\begin_layout Standard
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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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||||
Confusion of solution classes and/or their corresponding problem classes
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/ properties can be harmful to enterprises and to carreers of responsible
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persons.
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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 HA = High Availability
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\begin_inset CommandInset label
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@ -7123,278 +7395,6 @@ yes
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\end_inset
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\end_layout
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\begin_layout Section
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Replication vs Backup
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\begin_inset CommandInset label
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LatexCommand label
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name "sec:Replication-vs-Backup"
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|
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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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Intuitively, data backup and data replication are two different solution
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classes, addressing different problems.
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\end_layout
|
||||
|
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\begin_layout Standard
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However, there exist descriptions where both solution classes are overlapping,
|
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as well as their corresponding problem classes.
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For example, backup as explained in
|
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\begin_inset Flex URL
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status open
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|
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\begin_layout Plain Layout
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https://en.wikipedia.org/wiki/Backup
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\end_layout
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\end_inset
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could be seen as also encompassing some types of storage replications explained
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in
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\begin_inset Flex URL
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status open
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\begin_layout Plain Layout
|
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https://en.wikipedia.org/wiki/Replication_(computing)
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\end_layout
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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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For a rough comparison of
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\emph on
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typical
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\emph default
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implementations, see the following
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\emph on
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typical
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\emph default
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differences:
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\end_layout
|
||||
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\begin_layout Standard
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||||
\noindent
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\align center
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\begin_inset Tabular
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<lyxtabular version="3" rows="6" columns="3">
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<features tabularvalignment="middle">
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<column alignment="left" valignment="top">
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<column alignment="center" valignment="top">
|
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<column alignment="center" valignment="top">
|
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<row>
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<cell alignment="left" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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\end_layout
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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Backup
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\end_layout
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" rightline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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Replication
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\end_layout
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\end_inset
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</cell>
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</row>
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<row>
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<cell alignment="left" valignment="top" topline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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Fast handover (planned)
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\end_layout
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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no, or cumbersome
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\end_layout
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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yes
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\end_layout
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\end_inset
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</cell>
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</row>
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<row>
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<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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Fast failover (unplanned)
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\end_layout
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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no, or cumbersome
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\end_layout
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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yes
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\end_layout
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\end_inset
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</cell>
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</row>
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<row>
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<cell alignment="left" valignment="top" topline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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Protect for physical failures
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\end_layout
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||||
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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yes
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\end_layout
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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yes
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\end_layout
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\end_inset
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</cell>
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</row>
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<row>
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<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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Protect for logical data corruption
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\end_layout
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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yes (partly)
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\end_layout
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||||
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||||
\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" leftline="true" rightline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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typically no
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\end_layout
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||||
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\end_inset
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||||
</cell>
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</row>
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<row>
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<cell alignment="left" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
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\begin_inset Text
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\begin_layout Plain Layout
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Disaster Recovery Time (MTTR)
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\end_layout
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||||
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\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
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||||
\begin_inset Text
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||||
\begin_layout Plain Layout
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typically (very) slow
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\end_layout
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||||
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||||
\end_inset
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</cell>
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<cell alignment="center" valignment="top" topline="true" bottomline="true" leftline="true" rightline="true" usebox="none">
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||||
\begin_inset Text
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\begin_layout Plain Layout
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fast
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\end_layout
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||||
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||||
\end_inset
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||||
</cell>
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||||
</row>
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</lyxtabular>
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||||
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||||
\end_inset
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||||
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||||
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||||
\end_layout
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||||
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||||
\begin_layout Standard
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||||
\noindent
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Because of these typical differences, enterprise-critical data typically
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deserves
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\emph on
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both
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||||
\emph default
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solution classes.
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||||
\end_layout
|
||||
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||||
\begin_layout Standard
|
||||
\begin_inset Flex Custom Color Box 3
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||||
status open
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||||
\begin_layout Plain Layout
|
||||
Confusion of solution classes and/or their corresponding problem classes
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||||
/ properties can be harmful to enterprises and to carreers of responsible
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||||
persons.
|
||||
\end_layout
|
||||
|
||||
\end_inset
|
||||
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||||
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||||
\end_layout
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||||
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||||
\begin_layout Section
|
||||
|
|
|
|||
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Reference in New Issue