Return-Path: X-Original-To: apmail-accumulo-commits-archive@www.apache.org Delivered-To: apmail-accumulo-commits-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id C5083107B4 for ; Thu, 18 Jul 2013 22:30:35 +0000 (UTC) Received: (qmail 49065 invoked by uid 500); 18 Jul 2013 22:30:35 -0000 Delivered-To: apmail-accumulo-commits-archive@accumulo.apache.org Received: (qmail 49011 invoked by uid 500); 18 Jul 2013 22:30:35 -0000 Mailing-List: contact commits-help@accumulo.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: dev@accumulo.apache.org Delivered-To: mailing list commits@accumulo.apache.org Received: (qmail 49004 invoked by uid 99); 18 Jul 2013 22:30:35 -0000 Received: from nike.apache.org (HELO nike.apache.org) (192.87.106.230) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 18 Jul 2013 22:30:35 +0000 X-ASF-Spam-Status: No, hits=-2000.0 required=5.0 tests=ALL_TRUSTED X-Spam-Check-By: apache.org Received: from [140.211.11.4] (HELO eris.apache.org) (140.211.11.4) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 18 Jul 2013 22:30:30 +0000 Received: from eris.apache.org (localhost [127.0.0.1]) by eris.apache.org (Postfix) with ESMTP id 14FD2238890D; Thu, 18 Jul 2013 22:30:09 +0000 (UTC) Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: svn commit: r1504698 - in /accumulo/site/branches/git: ./ content/notable_features.mdtext content/people.mdtext content/source.mdtext Date: Thu, 18 Jul 2013 22:30:08 -0000 To: commits@accumulo.apache.org From: elserj@apache.org X-Mailer: svnmailer-1.0.9 Message-Id: <20130718223009.14FD2238890D@eris.apache.org> X-Virus-Checked: Checked by ClamAV on apache.org Author: elserj Date: Thu Jul 18 22:30:08 2013 New Revision: 1504698 URL: http://svn.apache.org/r1504698 Log: Merge the prod site into the git fork and remove the now useless svn info Modified: accumulo/site/branches/git/ (props changed) accumulo/site/branches/git/content/notable_features.mdtext accumulo/site/branches/git/content/people.mdtext accumulo/site/branches/git/content/source.mdtext Propchange: accumulo/site/branches/git/ ------------------------------------------------------------------------------ svn:mergeinfo = /accumulo/site/trunk:1490086-1504677 Modified: accumulo/site/branches/git/content/notable_features.mdtext URL: http://svn.apache.org/viewvc/accumulo/site/branches/git/content/notable_features.mdtext?rev=1504698&r1=1504697&r2=1504698&view=diff ============================================================================== --- accumulo/site/branches/git/content/notable_features.mdtext (original) +++ accumulo/site/branches/git/content/notable_features.mdtext Thu Jul 18 22:30:08 2013 @@ -74,11 +74,11 @@ and Zookeeper (see [FATE](#fate)). ### Write ahead log -Tablet servers send mutations to loggers, not HDFS. Each mutation is written -to multiple loggers, before being committed. In normal configurations, loggers +In version 1.4, tablet servers send mutations to loggers which write to the local file system, not HDFS. +Each mutation is written to multiple loggers, before being committed. In normal configurations, loggers are run on every server that runs a tablet server. When a log is needed for recovery, it is copied into HDFS. For efficient recovery, the log is sorted as -it is copied. +it is copied. In version 1.5, write ahead logs are written to HDFS, and loggers are no longer needed. ### Logical time @@ -136,7 +136,8 @@ Scans will not see data inserted into a If consecutive keys have identical portions (row, colf, colq, or colvis), there is a flag to indicate that a portion is the same as that of the previous key. This is applied when keys are stored on disk and when transferred over the -network. +network. Starting with 1.5, prefix erasure is supported. When its cost +effective, prefixes repeated in subsequent key fields are not repeated. ### Native In-Memory Map @@ -170,6 +171,16 @@ written. When an index block exceeds the written out between data blocks. The size of index blocks is configurable on a per table basis. +### Binary search in RFile blocks (1.5) + +RFile uses its index to locate a block of key values. Once it reaches a block +it performs a linear scan to find a key on interest. Starting with 1.5, Accumulo +will generate indexes of cached blocks in an adaptive manner. Accumulo indexes +the blocks that are read most frequently. When a block is read a few times, a +small index is generated. As a block is read more, larger indexes are generated +making future seeks faster. This strategy allows Accumulo to dynamically respond +to read patterns without precomputing block indexes when RFiles are written. + ## Testing ### Mock @@ -177,6 +188,13 @@ per table basis. The Accumulo client API has a mock implementation that is useful writing unit test against Accumulo. Mock Accumulo is in memory and in process. +### Mini Accumulo Cluster (1.5 & 1.4.4) + +Mini Accumulo cluster is a set of utility code that makes it easy to spin up +a local Accumulo instance running against the local filesystem. Mini Accumulo +is slower than Mock Accumulo, but its behavior mirrors a real Accumulo +instance more closely. + ### Functional Test Small, system-level tests of basic Accumulo features run in a test harness, @@ -236,6 +254,13 @@ could be different from the Accumulo nod Accumulo can be a source and/or sink for map reduce jobs. +### Thrift Proxy (1.5 & 1.4.4) + +The Accumulo client code contains a lot of complexity. For example, the +client code locates tablets, retries in the case of failures, and supports +concurrent reading and writing. All of this is written in Java. The thrift +proxy wraps the Accumulo client API with thrift, making this API easily +available to other languages like Python, Ruby, C++, etc. ## Extensible Behaviors @@ -327,6 +352,12 @@ was growing. Without this feature, inge constant rate, even as scan performance decreases because tablets have too many files. +### Loading jars using VFS (1.5) + +User written iterators are a useful way to manipulate data in data in Accumulo. +Before 1.5., users had to copy their iterators to each tablet server. Starting +with 1.5 Accumulo can load iterators from HDFS using Apache commons VFS. + ## On-demand Data Management ### Compactions @@ -335,7 +366,8 @@ Ability to force tablets to compact to o compacted. This is useful for improving query performance, permanently applying iterators, or using a new locality group configuration. One example of using iterators is applying a filtering iterator to remove data from a -table. +table. As of 1.5, users can initiate a compaction with iterators only applied to +that compaction event. ### Split points @@ -346,7 +378,8 @@ used to accommodate new data patterns in ### Tablet Merging (1.4) Tablet merging is a new feature. Merging of tablets can be requested in the -shell; Accumulo does not merge tablets automatically. +shell; Accumulo does not merge tablets automatically. In 1.5, the METADATA tablets +can be merged. ### Table Cloning (1.4) @@ -356,6 +389,11 @@ mutated independently. Testing was the m feature. For example to test a new filtering iterator, clone the table, add the filter to the clone, and force a major compaction. +### Import/Export Table (1.5) + +An offline tables metadata and files can easily be copied to another cluster and +imported. + ### Compact Range (1.4) Compact each tablet that falls within a row range down to a single file. @@ -369,4 +407,3 @@ beginning and end of the range are split [2]: /1.4/user_manual/Security.html [4]: /1.4/user_manual/Writing_Accumulo_Clients.html [6]: /1.4/user_manual/High_Speed_Ingest.html#Bulk_Ingest - Modified: accumulo/site/branches/git/content/people.mdtext URL: http://svn.apache.org/viewvc/accumulo/site/branches/git/content/people.mdtext?rev=1504698&r1=1504697&r2=1504698&view=diff ============================================================================== --- accumulo/site/branches/git/content/people.mdtext (original) +++ accumulo/site/branches/git/content/people.mdtext Thu Jul 18 22:30:08 2013 @@ -48,12 +48,13 @@ PMC and Committers usernamenameorganizationtimezone acordovaAaron Cordova afuchsAdam FuchssqrrlET (-5 / -4) - bimarguliesBenson Margulies + bimarguliesBenson MarguliesBasis Technology Corp. +ET (-5 / -4) billieBillie RinaldiHortonworksET (-5 / -4) brianlossBrian LossPraxis EngineeringET (-5 / -4) cawaringChris Waring ctubbsiiChristopher TubbsNSAET (-5 / -4) - cjnoletCorey J. NoletTexeltek, Inc.ET (-5 / -4) + cjnoletCorey J. NoletObjective Solutions, Inc.ET (-5 / -4) dlmarionDave MarionObjective Solutions, Inc.ET (-5 / -4) medinedDavid Medinets drewDrew FarrisBooz Allen HamiltonET (-5 / -4) @@ -62,6 +63,7 @@ PMC and Committers vinesJohn VinessqrrlET (-5 / -4) elserjJosh ElserSRA International, IncET (-5 / -4) kturnerKeith TurnerPeterson TechnologiesET (-5 / -4) + mdrobMike DrobET (-5 / -4) ujustgotbilldWilliam SlacumAgile Technology Group, IncET (-5 / -4) @@ -75,6 +77,7 @@ Contributors Chris McCubbinsqrrlET (-5 / -4) Christian RohlingEndgameET (-5 / -4) Damon BrownTetra Concepts LLCET (-5 / -4) + David M. Lyle Dennis PatroneThe Johns Hopkins University
Applied Physics LaboratoryET (-5 / -4) Ed KohlweyBooz Allen Hamilton edwardyoonEdward Yoon @@ -83,6 +86,7 @@ Contributors Jesse Yates Jim KlucarPraxis EngineeringET (-5 / -4) Joe Skora + jmhsiehJonathan M. HsiehClouderaPT (-8 / -7) Kevin FaroTetra Concepts LLCET (-5 / -4) Laura PeasleeObjective Solutions, Inc.ET (-5 / -4) Luke BrassardsqrrlET (-5 / -4) @@ -90,7 +94,7 @@ Contributors Michael AllensqrrlET (-5 / -4) Michael Berman Michael Wall - Mike Drob + Miguel PereiraSRA International, IncET (-5 / -4) Oren FalkowitzsqrrlET (-5 / -4) Phil EberhardtsqrrlET (-5 / -4) Philip Young @@ -99,6 +103,6 @@ Contributors Scott Kuehn supunSupun Kamburugamuva Tim Halloran - Tim ReardonTexelTek + Tim Reardon Travis Pinney \ No newline at end of file Modified: accumulo/site/branches/git/content/source.mdtext URL: http://svn.apache.org/viewvc/accumulo/site/branches/git/content/source.mdtext?rev=1504698&r1=1504697&r2=1504698&view=diff ============================================================================== --- accumulo/site/branches/git/content/source.mdtext (original) +++ accumulo/site/branches/git/content/source.mdtext Thu Jul 18 22:30:08 2013 @@ -18,12 +18,12 @@ Notice: Licensed to the Apache Softwa ## Source Code -Apache Accumulo™ source code is maintained using [Apache Subversion][subversion] version control -([browse][viewvc]|[checkout][svnloc]). It builds with [Apache Maven][maven]. +Apache Accumulo™ source code is maintained using [Git][git] version control +([browse][cgit]|[checkout][anongit]). It builds with [Apache Maven][maven]. ## Website -Accumulo's web site is also maintained in Subversion using Apache's [Content Management System][cms]. +Accumulo's web site is maintained in [Subversion][subversion] using Apache's [Content Management System][cms]. Committers may edit the site by following [these instructions][cmsusage]. Non-committers should follow [this FAQ entry][cmsanon]. @@ -39,12 +39,12 @@ will wait for you to enter a newline to 'thrift' command is in your path. Watch out for THRIFT-1367; you may need to configure Thrift with --without-ruby. -#### Checking out from svn +#### Checking out from Git To check out the code: - svn co https://svn.apache.org/repos/asf/accumulo/trunk/ + git clone http://git-wip-us.apache.org/repos/asf/accumulo.git #### Building @@ -73,28 +73,6 @@ Accumulo uses [Jenkins][jenkins] for aut Accumulo [tracks issues][jiraloc] with [JIRA][jira]. Every commit should reference a JIRA ticket of the form ACCUMULO-#. -### Merging Practices - -Changes should be merged from earlier branches of Accumulo to later branches. Currently, all changes are being merged from the 1.4 branch and later, but not all changes are merged from the 1.3 branch. When you make a change in branch 1.x, use the following process to merge to subsequent versions 1.y and 1.z: - - svn merge -r 1:HEAD 1.x_svn_url 1.y_local_dir - - examine merged files and conflicts - - svn ci 1.y_local_dir - - make sure the commit includes the svn mergeinfo - - svn merge -r 1:HEAD 1.y_svn_url 1.z_local_dir - - examine merged files and conflicts - - svn ci 1.z_local_dir - - make sure the commit includes the svn mergeinfo - -An additional step is now required to merge from 1.4 to 1.5 since the directory structure changed. Ask the dev list for instructions. - ### Coding Practices * License Header: Always add the current ASF license header as described in [ASF Source Header][srcheaders]. @@ -122,8 +100,6 @@ Accumulo's release guide can be found [h [subversion]: http://subversion.apache.org/ [maven]: http://maven.apache.org/ -[viewvc]: http://svn.apache.org/viewvc/accumulo/ -[svnloc]: https://svn.apache.org/repos/asf/accumulo/trunk/ [srcheaders]: http://www.apache.org/legal/src-headers.html [styles]: https://svn.apache.org/repos/asf/accumulo/trunk/contrib/ [jenkins]: http://jenkins-ci.org/ @@ -133,7 +109,10 @@ Accumulo's release guide can be found [h [13build]: https://builds.apache.org/job/Accumulo-1.3.x/ [jiraloc]: https://issues.apache.org/jira/browse/accumulo [jira]: http://www.atlassian.com/software/jira/overview -[release]: /governance/releasing.html +[release]: governance/releasing.html [cms]: http://www.apache.org/dev/cms.html [cmsusage]: http://www.apache.org/dev/cms.html#usage [cmsanon]: http://www.apache.org/dev/cmsref.html#non-committer +[git]: http://git-scm.com/ +[cgit]: https://git-wip-us.apache.org/repos/asf?p=accumulo.git;a=summary +[anongit]: http://git-wip-us.apache.org/repos/asf/accumulo.git