ZooKeeper项目已经纳入Apache，是一个开源的chord实现。-ZooKeeper project has been included in Apache, is an open source implementation of the chord.

chord全部源码包括chord0.1和sfslite0.8.16，可以安装。-chord and sfslite

FUNCTION: circular_arc_center_close draws closed arc centered at c1 with radius rad points c2,c3. Arc is closed with either PIE or CHORD. -FUNCTION: circular_arc_center_close draws closed arc centered at c1 with radius rad points c2,c3. Arc is