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doc: better explanation of resource sharing for VMs

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Thomas Schoebel-Theuer 2020-01-18 21:11:51 +01:00
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1 changed files with 20 additions and 25 deletions
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docu/mars-architecture-guide.lyx
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@ -7003,31 +7003,8 @@ separate replication layer at bare metal
is the correct solution, e.g. is the correct solution, e.g.
using dedicated storage boxes, or directly replicating at hypervisor hardware using dedicated storage boxes, or directly replicating at hypervisor hardware
when using local storage (as is the case at ShaHoLin). when using local storage (as is the case at ShaHoLin).
Not only for performance reasons and for resource allocation Not only for performance reasons and for resource allocation reasons, MARS
\begin_inset Foot is explicitly constructed for running on
status open
\begin_layout Plain Layout
Another argument: resource sharing in
\family typewriter
/mars
\family default
.
Each VM would require its own instance of
\family typewriter
/mars
\family default
, while a per-storage or per-hypervisor MARS instance can
\emph on
share
\emph default
its disk space.
MARS has been explicitly constructed with resource sharing in mind.
\end_layout
\end_inset
reasons, MARS is explicitly constructed for running on
\series bold \series bold
bare metal bare metal
\series default \series default
@ -7056,6 +7033,24 @@ functional component testing
\end_inset \end_inset
.
A single storage-level or hypervisor-level MARS instance can
\emph on
share
\emph default
a single
\family typewriter
/mars
\family default
filesystem instance for multiple resources, while a multitude of per-VM
\family typewriter
/mars
\family default
instances would induce a waste of storage space by
\emph on
factors
\emph default
. .
See also description of hardware requirements in See also description of hardware requirements in
\family typewriter \family typewriter