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b1bfcda38c
the code to gather statistics about the column_name is showing in the benchmark. If we really want to collect those statistics, I guess they will never be free because they involve a byte copy which implies an allocation. But one easy thing we can do to make it better, is collect both min and max statistics in the same loop. There is also no need to special case the case of an empty vector, since may_grow will already take care of that. That yields us a ~ 0.77 % boost, which although not earth shattering, is easy enough for us not to reap. Before: 200582.94 +- 293.91 partitions / sec (30 runs, 1 concurrent ops) After: 202120.06 +- 341.95 partitions / sec (30 runs, 1 concurrent ops) Signed-off-by: Glauber Costa <glommer@cloudius-systems.com>
#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