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doc: describe --recurse-submodules
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Thomas Schoebel-Theuer
parent
464e5f94f3
commit
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@ -6015,7 +6015,7 @@ Build for senior sysadmins or developers, inplace in the kernel source tree:
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\family default
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or similar, then
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\family typewriter
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cd block/ && git clone https://github.com/schoebel/mars
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cd block/ && git clone --recurse-submodules https://github.com/schoebel/mars
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\family default
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.
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Then
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@ -6147,6 +6147,41 @@ should
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because your kernel is patched anyway.
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\end_layout
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\begin_layout Standard
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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 12
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scale 7
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\end_inset
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Starting from version
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\family typewriter
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mars0.1stable56
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\family default
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or
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\family typewriter
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mars0.1abeta8
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\family default
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,
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\series bold
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submodules
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\series default
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have been added to the github repo of MARS.
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If you have an old checkout, please say
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\family typewriter
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git pull --recurse-submodules=yes
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\family default
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or similar.
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Otherwise you may be missing an important future part of the MARS release,
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without notice (depending on your local
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\family typewriter
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git
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\family default
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version and its local configuration).
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\end_layout
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\begin_layout Subsection
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Setup your Cluster Nodes
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\begin_inset CommandInset label
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@ -38078,7 +38113,7 @@ reference "sec:Defending-Overflow"
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\end_layout
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\begin_layout Chapter
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LV Football / Container Football
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LV Football / VM Football / Container Football
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\begin_inset CommandInset label
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LatexCommand label
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name "chap:LV-Football"
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@ -38088,6 +38123,194 @@ name "chap:LV-Football"
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\end_layout
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\begin_layout Standard
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The Football scripts can be obtained in two different ways:
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\end_layout
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\begin_layout Enumerate
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\family typewriter
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git clone --recurse-submodules https://github.com/schoebel/mars
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\begin_inset Newline newline
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\end_inset
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\family default
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then
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\family typewriter
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cd mars/football/
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\end_layout
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\begin_layout Enumerate
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\family typewriter
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git clone https://github.com/schoebel/football
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\end_layout
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\begin_layout Standard
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The
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\family typewriter
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--recurse-submodule
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\family default
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method is the preferred way for non-developers because the main repo contains
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a link to the right version of Football.
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\end_layout
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\begin_layout Standard
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\begin_inset Graphics
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filename images/lightbulb_brightlit_benj_.png
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lyxscale 12
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scale 7
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\end_inset
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Recommended MARS branch for playing Football is
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\family typewriter
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mars0.1a.y
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\family default
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.
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Although the old stable branch
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\family typewriter
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mars0.1.y
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\family default
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has been updated for the most important
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\family typewriter
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marsadm
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\family default
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features
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\family typewriter
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merge-cluster
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\family default
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and
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\family typewriter
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split-cluster
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\family default
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, it does not scale well for Football and can cause operational problems
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when merging too many hosts together, showing some
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\begin_inset Formula $O(n^{2})$
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\end_inset
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metadata update behaviour where
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\begin_inset Formula $n$
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\end_inset
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is the number of machines in a MARS cluster.
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The future branch
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\family typewriter
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mars0.1b.y
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\family default
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will contain more scalability improvements; in particular the
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\family typewriter
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split-cluster
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\family default
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operation should no longer be needed at all because it is planned to scale
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with
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\begin_inset Formula $O(k)$
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\end_inset
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where
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\begin_inset Formula $k$
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\end_inset
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is the number of resources at a
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\emph on
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single
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\emph default
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host.
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This should allow creation of a
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\emph on
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virtual(!)
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\emph default
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\family typewriter
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BigCluster
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\family default
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pool at
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\emph on
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metadata
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\emph default
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level (where metadata transfer rates are typically measured in KiB/s),
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consisting of thousands of machines, while at the same time creating a
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\family typewriter
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LocalSharding
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\family default
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or
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\family typewriter
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FlexibleSharding
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\family default
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model at the realtime IO paths (where some petabytes are pumped through
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thick pipelines).
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Please check the other branches regularly at the github repo whether some
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newer branches will be marked
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\begin_inset Quotes eld
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\end_inset
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stable
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\begin_inset Quotes erd
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\end_inset
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, or at least
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\begin_inset Quotes eld
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\end_inset
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beta
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\begin_inset Quotes erd
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\end_inset
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.
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At the moment (spring 2018),
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\family typewriter
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mars0.1a.y
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\family default
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is marked
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\begin_inset Quotes eld
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\end_inset
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beta
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\begin_inset Quotes erd
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\end_inset
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although it is in production at several thousands of machines for several
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months.
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\end_layout
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\begin_layout Standard
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Low-level documentation is available by calling any of the scripts with
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\family typewriter
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--help
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\family default
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parameter (see also appendix
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\begin_inset CommandInset ref
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LatexCommand ref
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reference "sec:football-–help"
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\end_inset
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ff):
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\end_layout
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\begin_layout Itemize
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\family typewriter
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./football.sh --help
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\end_layout
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\begin_layout Itemize
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\family typewriter
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./screener.sh --help
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\end_layout
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\begin_layout Standard
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By adding
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\family typewriter
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--verbose
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\family default
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, you can get a list of parameters for configuring and tweaking.
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\end_layout
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\begin_layout Chapter
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MARS for Developers
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\end_layout
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