b6e228c39f
I made the mistake of running scylla on a spinning disk. Since a disk can serve about 100 reads/second, that set the tone for the whole benchmark. Fix by improving cache preload when flushing a memtable. If we can detect that a mutation is not part of any sstable (other than the one we just wrote), we can add insert it into the cache. After this, running a mixed cassandra-stress returns the expected results, even on a spinning disk.
#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
Building urchin on Fedora
Installing required packages:
sudo yum install yaml-cpp-devel lz4-devel zlib-devel snappy-devel jsoncpp-devel
Building urchin on Ubuntu 14.04
Installing required packages:
sudo apt-get install libyaml-cpp-dev liblz4-dev zlib1g-dev libsnappy-dev libjsoncpp-dev