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e9917a5862
"This patch improves the read_indexes performance by an extra 16 %. The total gain so far is now 98 %, and although there are still things I believe we can do to improve it further, I consider a 2-fold increase sufficient to declare Issue #94 fixed. So: Fixes #94 The speed up is achieved by converting the reader to the NSM. To do that, I had to commonize most parts of the NSM. I had attempted this before, and for this new cycle, I had a new tool to aid me in this task: the sstable performance microbenchmark. Every change to the NSM was individually tested to make sure the performance of the read path was not regressing. When it did regress, I took alternate approaches and tried my best to discuss the whys in the changelogs, with the appropriate result. So I can be quite confident in affirming that we are not taking any drop here, while read_index performance is increased significantly"
#Urchin
##Building Urchin
In addition to required packages by Seastar, the following packages are required by Urchin.
Submodules
Urchin uses submodules, so make sure you pull the submodules first by doing:
git submodule init
git submodule update --recursive
Building urchin on Fedora
Installing required packages:
sudo yum install yaml-cpp-devel lz4-devel zlib-devel snappy-devel jsoncpp-devel thrift-devel antlr3-tool antlr3-C++-devel libasan libubsan
Building urchin on Ubuntu 14.04
Installing required packages:
sudo apt-get install libyaml-cpp-dev liblz4-dev zlib1g-dev libsnappy-dev libjsoncpp-dev