accumulo git commit: ACCUMULO-4480 - update testing section of user manual for 1.8

[mj...@apache.org]

Repository: accumulo
Updated Branches:
  refs/heads/1.8 bdb27e978 -> a4ef3e09f


ACCUMULO-4480 - update testing section of user manual for 1.8


Project: http://git-wip-us.apache.org/repos/asf/accumulo/repo
Commit: http://git-wip-us.apache.org/repos/asf/accumulo/commit/a4ef3e09
Tree: http://git-wip-us.apache.org/repos/asf/accumulo/tree/a4ef3e09
Diff: http://git-wip-us.apache.org/repos/asf/accumulo/diff/a4ef3e09

Branch: refs/heads/1.8
Commit: a4ef3e09f36aa51e575461113b3005e504fdae11
Parents: bdb27e9
Author: Michael Wall <mj...@gmail.com>
Authored: Thu Feb 2 12:57:00 2017 -0500
Committer: Michael Wall <mj...@gmail.com>
Committed: Thu Feb 9 14:25:05 2017 -0500

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 .../main/asciidoc/chapters/administration.txt   | 37 ++++++++------------
 1 file changed, 14 insertions(+), 23 deletions(-)
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http://git-wip-us.apache.org/repos/asf/accumulo/blob/a4ef3e09/docs/src/main/asciidoc/chapters/administration.txt
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diff --git a/docs/src/main/asciidoc/chapters/administration.txt b/docs/src/main/asciidoc/chapters/administration.txt
index c716a16..e8fbcb8 100644
--- a/docs/src/main/asciidoc/chapters/administration.txt
+++ b/docs/src/main/asciidoc/chapters/administration.txt
@@ -316,10 +316,10 @@ will expect the KeyStore in the same location.
 [[ClientConfiguration]]
 ==== Client Configuration
 
-In version 1.6.0, Accumulo includes a new type of configuration file known as a client
+In version 1.6.0, Accumulo included a new type of configuration file known as a client
 configuration file. One problem with the traditional "site.xml" file that is prevalent
 through Hadoop is that it is a single file used by both clients and servers. This makes
-is very difficult to protect secrets that are only meant for the server processes while
+it very difficult to protect secrets that are only meant for the server processes while
 allowing the clients to connect to the servers.
 
 The client configuration file is a subset of the information stored in accumulo-site.xml
@@ -1175,24 +1175,15 @@ the system to full capacity without administrator interaction after many of the
 common failure modes.
 
 ==== Tested Versions
-Another large consideration for Accumulo stability is to use versions of
-software that have been tested together in a VM environment. Any cluster of
-processes that have not been tested together are likely to expose running
-conditions that vary from the environments individually tested in the various
-components. For example, Accumulo's use of HDFS includes many short block
-reads, which differs from the more common full file read used in most
-map/reduce applications. We have found that certain versions of Accumulo and
-Hadoop will include stability bugs that greatly affect overall stability. In
-our testing, Accumulo 1.6.2, Hadoop 2.6.0, and Zookeeper 3.4.6 resulted in a
-stable VM clusters that did not fail a month of testing, while Accumulo 1.6.1,
-Hadoop 2.5.1, and Zookeeper 3.4.5 had a mean time between failure of less than
-a week under heavy ingest and query load. We expect that results will vary with
-other configurations, and you should choose your software versions with that in
-mind.
-
-
-
-
-
-
-
+Each release of Accumulo is built with a specific version of Apache
+Hadoop, Apache ZooKeeper and Apache Thrift.  We expect Accumulo to
+work with versions that are API compatable with those versions.
+However this compatibility is not guaranteed because Hadoop, ZooKeeper
+and Thift may not provide guarantees between their own versions. We
+have also found that certain versions of Accumulo and Hadoop included
+bugs that greatly affected overall stability.  Thrift is particularly
+prone to compatablity changes between versions and you must use the
+same version your Accumulo is built with.
+
+Please check the release notes for your Accumulo version or use the
+mailing lists at https://accumulo.apache.org for more info.