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dictionary updates
(cherry picked from commit e71c5d1)
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src/common/de/cmc_differences.asciidoc

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@@ -86,7 +86,7 @@ Durch dieses Verfahren ergibt sich eine Reihe von Vorteilen:
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* Nahezu vernachlässigbare CPU-Last durch Host-Checks: Es können selbst ohne besonders leistungsfähige Hardware Zigtausende von Hosts überwacht werden.
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* Kein Ausbremsen des Monitorings durch blockierende Host-Checks auf Abruf, falls Hosts {DOWN} sind.
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* Keine Fehlalarme von Services bei nicht aktuellem Host-Status.
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* Keine Fehlalarme von Services bei nicht aktuellem Host-Zustand.
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Ein Nachteil soll dabei nicht verschwiegen werden:
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Die Host-Checks via Smart Ping erzeugen keine Performance-Daten (Paketlaufzeiten).

src/common/en/cmc_differences.asciidoc

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@@ -44,7 +44,7 @@ Instead of multiple packets in rapid series that are waited upon, `icmpsender` s
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This behavior drastically reduces resource consumption and data traffic.
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The responses to the pings are not explicitly waited-for.
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CMC's `icmpreceiver` component is responsible for deciding whether the status of a host is {UP} or {DOWN}.
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CMC's `icmpreceiver` component is responsible for deciding whether the state of a host is {UP} or {DOWN}.
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It considers incoming ping packets from a host as a successful host check and thus marks the host as {UP}.
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If no packet is received from a host within a defined time, this host will be flagged as {DOWN}.
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The timeout is preset to 15 seconds (2.5 intervals) and can be changed per host with the [.guihint]#Settings for host checks via Smart PING# rule set.
@@ -64,20 +64,20 @@ This mechanism can lead to flapping states of hosts in infrastructures where ICM
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Host checks not only serve to trigger notifications in the case of a total host failure, but also to suppress xref:notifications#state_host[notifications of service problems] during the host's down time.
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Service problems can arise and not be responsibility of the service itself, but rather of a failure condition of the host.
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It can happen that a host is actually {DOWN} even if its last known status in {CMK} is {UP} as per the last host check result.
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In such condition multiple service checks could returns problems that depend on the hosts {DOWN} status, resulting in sending service notifications -- erroneously.
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It can happen that a host is actually {DOWN} even if its last known state in {CMK} is {UP} as per the last host check result.
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In such condition multiple service checks could returns problems that depend on the hosts {DOWN} state, resulting in sending service notifications -- erroneously.
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It is therefore important to determine a host's condition first, in the event of a service problem.
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The CMC solves this problem very simply:
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if a service problem arises and the host is in an {UP} status, CMC will wait for the next host check.
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if a service problem arises and the host is in an {UP} state, CMC will wait for the next host check.
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Due to the interval being very short at only (by default) 6 seconds, there is only a negligible delay to a notification -- if the host is still {UP} and therefore the notification needs to be sent for the service.
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As an example, let's take the case of a `check_http` plug-in delivering a {CRIT} status, due to a queried web server being unavailable.
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As an example, let's take the case of a `check_http` plug-in delivering a {CRIT} state, due to a queried web server being unavailable.
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In this situation, _following the start_ of the service check a TCP RST packet (_connection refused_) will be received from this server by the `icmpreceiver` component.
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The CMC therefore knows for certain that the host itself is {UP} and it can thus send the notification without delay.
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The same principle is utilized when calculating network outages if xref:notifications#parents[parent hosts] have been defined.
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Here as well notifications will at times be delayed briefly in order to wait for a verified status.
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Here as well notifications will at times be delayed briefly in order to wait for a verified state.
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// end proofreading
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@@ -87,7 +87,7 @@ This procedure yields a number of advantages:
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* Virtually insignificant CPU load resulting from host checks -- even without particularly powerful hardware umpteen thousand hosts can be monitored.
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* No thwarting of monitoring by on-demand host check jams if hosts are {DOWN}.
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* No false alarms from services when a host status is not current.
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* No false alarms from services when a host state is not current.
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One disadvantage should not be hushed-up however:
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the Smart Ping host checks generate no performance data (packet runtimes).

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