http://www.csdn.net/article/2013-04-11/2814850-877000-tps-with-erlang-and-voltdb
1、voltdb安装很简单,解压即可。
在官网上提到有几点影响性能的系统设置:
http://voltdb.com/docs/EnterpriseReleaseNotes/
1.1. | Disable Swapping |
Swapping is an operating system feature that optimizes memory usage when running multiple processes. However, memory is a critical component of the VoltDB server process. Any contention for memory, including swapping, will have a very negative impact on performance and functionality.
We recommend using dedicated servers and disabling swapping when running the VoltDB database server process. Use the |
1.2. | Turn off TCP segmentation offload and generic receive offload if cluster stability is a problem. |
There is an issue where, under certain conditions, the use of TCP segmentation offload (TSO) and generic receive offload (GRO) can cause nodes to randomly drop out of a cluster. The symptoms of this problem are that nodes timeout — that is, the rest of the cluster thinks they have failed — although the node is still running and no other network issues (such as a network partition) are the cause.
Disabling TSO and GRO is recommended for any VoltDB clusters that experience such instability. The commands to disable offloading are the following, where N is replaced by the number of the ethernet card: ethtool -K eth<span class="emphasis"><em>N</em></span> tso off ethtool -K eth<span class="emphasis"><em>N</em></span> gro off Note that these commands disable offloading temporarily. You must issue these commands every time the node reboots. |
1.2. | Turn off TCP segmentation offload and generic receive offload if cluster stability is a problem. |
There is an issue where, under certain conditions, the use of TCP segmentation offload (TSO) and generic receive offload (GRO) can cause nodes to randomly drop out of a cluster. The symptoms of this problem are that nodes timeout — that is, the rest of the cluster thinks they have failed — although the node is still running and no other network issues (such as a network partition) are the cause.
Disabling TSO and GRO is recommended for any VoltDB clusters that experience such instability. The commands to disable offloading are the following, where N is replaced by the number of the ethernet card: ethtool -K eth<span class="emphasis"><em>N</em></span> tso off ethtool -K eth<span class="emphasis"><em>N</em></span> gro off Note that these commands disable offloading temporarily. You must issue these commands every time the node reboots. |
All new 2013 nfl Jerseys is in stock, Get nfl Jerseys and wear the latest nfl jerseys anytime.
Cheap Nike Youth nfl Jerseys China Wholesale Free Shipping