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 <mjw...@gmail.com> Authored: Thu Feb 2 12:57:00 2017 -0500 Committer: Michael Wall <mjw...@gmail.com> Committed: Thu Feb 9 14:25:05 2017 -0500 ---------------------------------------------------------------------- .../main/asciidoc/chapters/administration.txt | 37 ++++++++------------ 1 file changed, 14 insertions(+), 23 deletions(-) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/accumulo/blob/a4ef3e09/docs/src/main/asciidoc/chapters/administration.txt ---------------------------------------------------------------------- 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.