[ANNOUNCE] Apache 1.6.1 Released
The Apache Accumulo project is happy to announce its 1.6.1 release. Version 1.6.1 is the most recent bug-fix release in its 1.6.x release line. This version includes numerous bug fixes and performance improvements over previous versions. Existing users of 1.6.x are encouraged to upgrade to this version. Users new to Accumulo are encouraged to start with this version as well. The Apache Accumulo sorted, distributed key/value store is a robust, scalable, high performance data storage system that features cell-based access control and customizable server-side processing. It is based on Google's BigTable design and is built on top of Apache Hadoop, Apache Zookeeper, and Apache Thrift. The release is available at http://accumulo.apache.org/downloads/ and release notes at http://accumulo.apache.org/release_notes/1.6.1.html. Thanks. - The Apache Accumulo Team
Fwd: [ANNOUNCE] Apache 1.6.1 Released
+ user@a.a.o Original Message Subject: [ANNOUNCE] Apache 1.6.1 Released Date: Fri, 3 Oct 2014 13:59:24 -0400 From: Corey Nolet Reply-To: d...@accumulo.apache.org To: annou...@apache.org, "d...@accumulo.apache.org" The Apache Accumulo project is happy to announce its 1.6.1 release. Version 1.6.1 is the most recent bug-fix release in its 1.6.x release line. This version includes numerous bug fixes and performance improvements over previous versions. Existing users of 1.6.x are encouraged to upgrade to this version. Users new to Accumulo are encouraged to start with this version as well. The Apache Accumulo sorted, distributed key/value store is a robust, scalable, high performance data storage system that features cell-based access control and customizable server-side processing. It is based on Google's BigTable design and is built on top of Apache Hadoop, Apache Zookeeper, and Apache Thrift. The release is available at http://accumulo.apache.org/downloads/ and release notes at http://accumulo.apache.org/release_notes/1.6.1.html. Thanks. - The Apache Accumulo Team
Determining tablets assigned to table splits, and the number of rows in each tablet
This is for Accumulo 1.6. Suppose we have the table splits c g w Does anyone know how to determine 1. *the number of tablets assigned to each table split range? * For this example, this is the number of tablets in the ranges (-Inf,c), (c,g), (g,w), (w,Inf). Or is the design 1-1, that is, for each table split range there is exactly one tablet? 2. *the number of rows inside all the tablets occupying a table split range? * For this example, this is the total number of rows among all tablets in the ranges (-Inf,c), (c,g), (g,w), (w,Inf). We use this count to verify how well manually set table splits are load balancing in the tables. Some context: I wrote functions that found these numbers two years ago working on D4M in Accumulo 1.5. I took the dark route of using non-public Accumulo API to get TabletServer information, get TabletStats information, and find the matchings to a table's splits by scanning the extents listed in the METATABLE. I can share the code if anyone is curious. It's not pretty, but it did the job. Moving forward as we aim to upgrade to Accumulo 1.6, we should determine the tablet split information the right way, not by reverse engineering Accumulo. Any suggestions? Thanks, Dylan Hutchison -- www.cs.stevens.edu/~dhutchis
