From 59a1716544b0ed34d6b44e4d1d44d46d4fadbc4b Mon Sep 17 00:00:00 2001 From: Travis Truman Date: Mon, 1 Feb 2016 16:18:48 -0500 Subject: [PATCH] Spelling and grammar copy edit of the Pacemaker intro Change-Id: If3492cf6f47b5c9a6d0491e66fb93aa0dd0d385d --- doc/ha-guide/source/intro-ha-arch-pacemaker.rst | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/doc/ha-guide/source/intro-ha-arch-pacemaker.rst b/doc/ha-guide/source/intro-ha-arch-pacemaker.rst index 1b12bb54..e81cc523 100644 --- a/doc/ha-guide/source/intro-ha-arch-pacemaker.rst +++ b/doc/ha-guide/source/intro-ha-arch-pacemaker.rst @@ -38,7 +38,7 @@ cluster manager: majority. Failure to do this leads very quickly to an internal `split-brain `_ state - where different parts of the system are pulling in - different and incompatioble directions. + different and incompatible directions. #. Data integrity through fencing (a non-responsive process does not imply it is not doing anything) @@ -75,7 +75,7 @@ clusters contain at least three nodes so that we can take advantage of `quorum `_. Quorum becomes important when a failure causes the cluster to split in -two or more paritions. In this situation, you want the majority to +two or more partitions. In this situation, you want the majority to ensure the minority are truly dead (through fencing) and continue to host resources. For a two-node cluster, no side has the majority and you can end up in a situation where both sides fence each other, or @@ -120,7 +120,7 @@ In this configuration, each service runs in a dedicated cluster of The benefits of this approach are the physical isolation between components and the ability to add capacity to specific components. -You would also choose this option if you prefer to have more but +You would choose this option if you prefer to have more but less powerful boxes. This scenario can be visualized as below, where each box below @@ -134,7 +134,7 @@ Mixed It is also possible to follow a segregated approach for one or more components that are expected to be a bottleneck and use a collapsed -apprach for the remainder. +approach for the remainder. Proxy server @@ -187,7 +187,7 @@ alternatives in the marketplace. We use a check interval of 1 second, however, the timeouts vary by service. -Generally, we use round-robin to distriute load amongst instances of +Generally, we use round-robin to distribute load amongst instances of active/active services, however, Galera uses the ``stick-table`` options to ensure that incoming connections to the virtual IP (VIP) should be directed to only one of the available back ends.