X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/gpc2011.git/blobdiff_plain/78353162997856ba5e70b517ca3e5e94d3321eaa..fd2636199b12d44a403d787edfa93c2c6f45ae1d:/xwch.tex

diff --git a/xwch.tex b/xwch.tex
index 62039a2..4b7743e 100644
--- a/xwch.tex
+++ b/xwch.tex
@@ -8,16 +8,17 @@ class of systems are very tightly coupled and powerful but not very error
 tolerant. Cluster computing environments like Condor
 \cite{condor-practice} and volunteer computing systems like BOINC \cite{boinc} are loosely coupled and
 have a scheduler that distributes tasks to computing nodes. Cluster
-computing environments assume that nodes are most often accessible
-which is not applies to volunteer computing systems.
+computing environments assume the fact that nodes are in general
+directly accessible, one to another, but this does not apply to
+volunteer computing systems.
 
 XtremWeb-CH (XWCH) is a volunteer computing inspired large-scale
 computing platform for distributed applications. In fact, it tends to
 be a good compromise between cluster computing and volunteer
 computing.  It is originaly based on another platform called XtremWeb
- \cite{xtremweb}. It is easy to install and maintain and it is supported by a Grid
-middleware (ARC \cite{arc}) and a workflow engine (JOpera \cite{JOpera}).  It consists in
-three components: one coordinator, a set of workers and at least one
+ \cite{xtremweb}. It is easy to install, maintain, and it is supported by a Grid
+middleware (ARC \cite{arc}) and a workflow engine (JOpera \cite{JOpera}). It consists in
+three components: one coordinator, a set of workers, and at least one
 warehouse. Client programs use these components.
 
 The coordinator is the main component of the XWCH platform. It
