mirror of
https://github.com/schoebel/mars
synced 2025-01-20 14:30:53 +00:00
marsadm: disallow ordinary switching when logfiles are damaged
Only primary --force should be possible in such a (rare) case.
This commit is contained in:
Thomas Schoebel-Theuer
Thomas Schoebel-Theuer
parent
d67336420d
commit
cc1d786654
@ -1,5 +1,5 @@
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#LyX 2.0 created this file. For more info see http://www.lyx.org/
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\lyxformat 413
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#LyX 2.1 created this file. For more info see http://www.lyx.org/
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@ -22,13 +22,13 @@ fixltx2e
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@ -50,15 +50,24 @@ fixltx2e
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@ -570,9 +579,9 @@ The following table is a short guide to the most important cases where the
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@ -6904,10 +6913,10 @@ should
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@ -7699,7 +7708,7 @@ status open
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\begin_layout Plain Layout
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\begin_inset Caption
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\begin_inset Caption Standard
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\begin_layout Plain Layout
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overview on amounts / cursors
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@ -11943,7 +11952,7 @@ remembers
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<lyxtabular version="3" rows="6" columns="3">
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<column alignment="left" valignment="top" width="0pt">
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<column alignment="left" valignment="top" width="0pt">
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@ -12191,7 +12200,7 @@ If you intentionally want to switch over (and to produce a split brain as
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\size tiny
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\begin_inset Tabular
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<lyxtabular version="3" rows="9" columns="3">
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<column alignment="left" valignment="top" width="0pt">
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@ -14532,9 +14541,9 @@ The following table documents common options which work with (almost) any
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\size scriptsize
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@ -15525,9 +15534,9 @@ name "sec:Cluster-Operations"
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\size scriptsize
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\begin_inset Tabular
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<lyxtabular version="3" rows="6" columns="3">
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<features islongtable="true" longtabularalignment="left">
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<cell alignment="left" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
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@ -16506,9 +16515,9 @@ name "sub:Resource-Creation"
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\size scriptsize
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\begin_inset Tabular
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<lyxtabular version="3" rows="6" columns="3">
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<features islongtable="true" longtabularalignment="left">
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<cell alignment="left" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
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@ -17758,9 +17767,9 @@ all
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\size scriptsize
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\begin_inset Tabular
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<lyxtabular version="3" rows="42" columns="3">
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<features islongtable="true" longtabularalignment="left">
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<features rotate="0" islongtable="true" longtabularalignment="left">
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<column alignment="left" valignment="top" width="0pt">
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<column alignment="center" valignment="top">
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<cell alignment="left" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
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@ -21483,6 +21492,12 @@ resume-replay
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/mars/
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\family default
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to fetch it.
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Any replay must not have been interrupted by a replay error (see macro
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%replay-code{} or diskstate
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\family typewriter
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DefectiveLog
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\family default
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).
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The current designated primary must be reachable over network.
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When there is no designated primary (i.e.
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@ -21669,8 +21684,8 @@ pause-fetch
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\family typewriter
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pause-replay
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\family default
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), many preconditions are skipped, and MARS does its best to actually become
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primary even if some logfiles are missing or incomplete.
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), most preconditions are ignored, and MARS does its best to actually become
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primary even if some logfiles are missing or incomplete or even defective.
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\end_layout
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\begin_layout Plain Layout
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@ -21843,17 +21858,37 @@ your
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\size scriptsize
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primary --force
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\family default
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switches only the
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switches the
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\emph on
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designated
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\emph default
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primary, but actually becoming the / an actual primary may be impossible
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in case you are
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primary.
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In some extremely rare cases, when
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\emph on
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multiple
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\emph default
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faults have accumulated in a
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\emph on
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weird
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\emph default
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situation, it
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\emph on
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might
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\emph default
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be impossible becoming the / an actual primary.
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Typically you may be
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\emph on
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already
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\emph default
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in a split brain situation.
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In such a case, you
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This has not been observed for a long operations time on recent versions
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of MARS, but in general becoming primary via
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\family typewriter
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--force
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\family default
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cannot be guaranteed always, although MARS does its best.
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In split brain situations, or if you ever encounter such a problem, you
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\emph on
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must
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\emph default
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@ -22798,9 +22833,9 @@ Logfile Operations
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\size scriptsize
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\begin_inset Tabular
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<lyxtabular version="3" rows="4" columns="3">
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<features islongtable="true" longtabularalignment="left">
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<features rotate="0" islongtable="true" longtabularalignment="left">
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<column alignment="left" valignment="top" width="0pt">
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<column alignment="center" valignment="top" width="0">
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<column alignment="center" valignment="top">
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<column alignment="left" valignment="top" width="0pt">
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<row endhead="true" endfirsthead="true" endfoot="true" endlastfoot="true">
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<cell alignment="left" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
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@ -23233,9 +23268,9 @@ Consistency Operations
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\size scriptsize
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\begin_inset Tabular
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<lyxtabular version="3" rows="4" columns="3">
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<features islongtable="true" longtabularalignment="left">
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<features rotate="0" islongtable="true" longtabularalignment="left">
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<column alignment="left" valignment="top" width="0pt">
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<column alignment="center" valignment="top" width="0">
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<column alignment="center" valignment="top">
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<column alignment="left" valignment="top" width="0pt">
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<row endhead="true" endfirsthead="true" endfoot="true" endlastfoot="true">
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<cell alignment="left" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
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@ -23689,9 +23724,9 @@ Inspection Commands
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\size scriptsize
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\begin_inset Tabular
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<lyxtabular version="3" rows="14" columns="3">
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<features islongtable="true" longtabularalignment="left">
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<features rotate="0" islongtable="true" longtabularalignment="left">
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<column alignment="left" valignment="top" width="0pt">
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<column alignment="center" valignment="top" width="0">
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<column alignment="center" valignment="top">
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<column alignment="left" valignment="top" width="0pt">
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<row endhead="true" endfirsthead="true" endfoot="true" endlastfoot="true">
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<cell alignment="left" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
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@ -25031,9 +25066,9 @@ Per-Resource Parameters
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\size scriptsize
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\begin_inset Tabular
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<lyxtabular version="3" rows="4" columns="3">
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<features islongtable="true" longtabularalignment="left">
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<features rotate="0" islongtable="true" longtabularalignment="left">
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<column alignment="left" valignment="top" width="0pt">
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<column alignment="center" valignment="top" width="0">
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<column alignment="center" valignment="top">
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<column alignment="left" valignment="top" width="0pt">
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<row endhead="true" endfirsthead="true" endfoot="true" endlastfoot="true">
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<cell alignment="left" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
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@ -25297,9 +25332,9 @@ Global Parameters
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\size scriptsize
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\begin_inset Tabular
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<lyxtabular version="3" rows="8" columns="3">
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<features islongtable="true" longtabularalignment="left">
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<features rotate="0" islongtable="true" longtabularalignment="left">
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<column alignment="left" valignment="top" width="0pt">
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<column alignment="center" valignment="top" width="0">
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<column alignment="center" valignment="top">
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<column alignment="left" valignment="top" width="0pt">
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<row endhead="true" endfirsthead="true" endfoot="true" endlastfoot="true">
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<cell alignment="left" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
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@ -25868,9 +25903,9 @@ name "sub:Waiting"
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\size scriptsize
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\begin_inset Tabular
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<lyxtabular version="3" rows="5" columns="3">
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<features islongtable="true" longtabularalignment="left">
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<features rotate="0" islongtable="true" longtabularalignment="left">
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<column alignment="left" valignment="top" width="0pt">
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<column alignment="center" valignment="top" width="0">
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<column alignment="center" valignment="top">
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<column alignment="left" valignment="top" width="0pt">
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<row endhead="true" endfirsthead="true" endfoot="true" endlastfoot="true">
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<cell alignment="left" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
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@ -26479,9 +26514,9 @@ These commands are for experts and advanced sysadmins only.
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\size scriptsize
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\begin_inset Tabular
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<lyxtabular version="3" rows="4" columns="3">
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<features islongtable="true" longtabularalignment="left">
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<features rotate="0" islongtable="true" longtabularalignment="left">
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<column alignment="left" valignment="top" width="0pt">
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<column alignment="center" valignment="top" width="0">
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<column alignment="center" valignment="top">
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<column alignment="left" valignment="top" width="0pt">
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<row endhead="true" endfirsthead="true" endfoot="true" endlastfoot="true">
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<cell alignment="left" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
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@ -26771,9 +26806,9 @@ Senseless Commands (from DRBD)
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\size scriptsize
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\begin_inset Tabular
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<lyxtabular version="3" rows="11" columns="3">
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<features islongtable="true" longtabularalignment="left">
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<features rotate="0" islongtable="true" longtabularalignment="left">
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<column alignment="left" valignment="top" width="0pt">
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<column alignment="center" valignment="top" width="0">
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<column alignment="center" valignment="top">
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<column alignment="left" valignment="top" width="0pt">
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<row endhead="true" endfirsthead="true" endfoot="true" endlastfoot="true">
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<cell alignment="left" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
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@ -27414,9 +27449,9 @@ These commands are not implemented because they would be dangerous in MARS
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\size scriptsize
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\begin_inset Tabular
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<lyxtabular version="3" rows="3" columns="3">
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<features islongtable="true" longtabularalignment="left">
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<features rotate="0" islongtable="true" longtabularalignment="left">
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<column alignment="left" valignment="top" width="0pt">
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<column alignment="center" valignment="top" width="0">
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<column alignment="center" valignment="top">
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<column alignment="left" valignment="top" width="0pt">
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<row endhead="true" endfirsthead="true" endfoot="true" endlastfoot="true">
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<cell alignment="left" valignment="top" topline="true" bottomline="true" leftline="true" usebox="none">
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@ -2079,6 +2079,12 @@ sub primary_phase0 {
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check_todo($cmd, $res, "attach", 1, 0);
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check_todo($cmd, $res, "fetch", 1, 0) if !$force;
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check_todo($cmd, $res, "replay", 1, 0);
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# check that no logfile replay errors exist.
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my $replay_error = get_link("$mars/resource-$res/actual-$host/replay-code", 2);
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if ($replay_error < 0) {
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lwarn "Logfile replay / recovery stopped with error code $replay_error.\n";
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ldie "Cannot switch to avoid unnoticed data loss. You may however do a 'primary --force'.\n" unless $force;
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}
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}
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return if ($old eq $host and $cmd eq "primary");
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return if $old eq "(none)";
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