Interconnect MPP Segment Host MPP Master Host ? Synch Process Standby Master MPP Segment Host MPP Segment Host Primary Segment C Mirror Segment B Primary Segment B Mirror Segment A Primary Primary Segent A Mirror Segment C 2016Postgres中国用户大会 Postgres Conference China 2016 中国用户大会 PostgreSQL Heritage Greenplum Open Source Launch • Widely used • Open Source • Enterprise class relational increased support for mission critical systems Upcoming Roadmap • PostgreSQL WAL Replication Segment Mirroring (Longer Term) • Data Domain and NetBackup Version Upgrades • Reduce pg_class locking during

Host Segment Host Segment Instance Segment Instance Segment Instance Segment Instance Segment Host Segment Instance Segment Instance Segment Instance Segment Instance Segment Host Segment Instance Instance Segment Instance Segment Instance Segment Instance Segment Host Segment Instance Segment Instance Segment Instance Segment Instance query Load Master节点和Standby Master节点 Greenplum 架构 Interconnect高速网络 Interconnect高速网络 Segment主机部署多个Segment实例 （Primary Segment和Mirror Segment） Greenplum 部署方案 ● Master节点和Standby Master分机部署 ● Primary Segment节点和Mirror Segment节点分机部署 ● Mirroring部署方案 Segment Instance Segment host 1

Specials v Contains more operators for the color ramp. Flip Color Ramp Flips the gradient, mirroring the positions of the stops. Distribute Stops from Left Distribute the stops so that every step Controls how the control points affect the curve shape. It determines the interpolation of the curve segment at the selected control point. Vector Handle: Vector handles create straight lines and sharp corners stroke. Annotate Line Style Start, End The decoration to use at the beginning or end of the line segment. This can be used for example to create arrows to point out specific details in a scene. Annotation

支持子查询，但不支持 窗口函数。大部分dml都 不支持，只支持append。 稳定性 有较多的bug。 比较稳定。 Greenplum架构图 Segment Host Segment Host Segment Host Segment Host 高 速 以 太 网 交 换 机 Master Host Lan Client Host Greenplum架构: Master介绍 Master服务器是外面用户访问greenplum的入口。用户 都是连接master服务器的，对于外部用户来说，他并不 与segment host服务器发生任何关系，外部用户的网络 只需要与master服务器连通就可以了，不需要访问 segment host服务器。 所有的用户连接都是直接连接到master服务器上的。 Greenplum数据库是基于PostgreSQL数据库的，所以 所有元数据，如表结构定义、索引等等。但其并不存储 实际的数据，实际的数据是存储在segment 数据库 的。 master服务器接受从用户发来的连接，并做用户验证， 接收用户发来的sql，生成分布式执行计划，再把分布 执行计划分发到segment上执行，接收segment返回的 数据，最后返回给用户。 Greenplum架构: Segment介绍 Segment是数据的实际存储的地方，也是一个经过改造 过的Pos

text can be changed by choosing a different label orientation in the label’s properties, or by mirroring/rotating the label. The Label Properties dialog can be accessed at any time by selecting a label right-click context menu. Wire Connections To establish a connection, a segment of wire must be connected by its end to another segment or to a pin. Only wire ends create connections; if a wire crosses the Move tool moves only the selected segment, without maintaining existing connections to other segments. The Drag tool maintains existing connections. If a segment is selected or the cursor is over the

的控制节点/实例 Standby ： GP 的备用控制节点/实例 Host(主机) ： GP 的一台独立的机器设备 Instance ： GP 的计算实例，很多时候也叫 Segment Primary ： GP 的主计算实例 Mirror ： GP 的镜像计算实例 MPP ： 大规模并行处理 算子 ： 执行计划中的运算操作 背景简介 conf(包括 Standby)文件中： max_connections=100 max_prepared_transactions=100 在所有的 Instance 上 SEGMENT_DATA_DIRECTORY/postgresql.conf 文件中： max_connections=500 max_prepared_transactions=100 通过 gp_toolkit.gp_resgroup_status_per_segment 视图来查看每个资 源组在每个 Instance 上的 CPU 和内存的实时使用量： =# SELECT * FROM gp_toolkit.gp_resgroup_status_per_segment; 查看资源组被分配到 ROLE 的情况 Greenplum

interpolated, whatever option you chose. 缓动(通过强度)。 Different methods of easing interpolations for F-Curve segment. The "Robert Penner easing equations" (basically, equations which define some preset ways that one 淡⼊: 淡出: 淡⼊淡出: ⾃动: 周期属性控制振荡发⽣的频率。较⾼的值导致更密 集的振荡。 缓动 The Easing Type controls which end of the segment between the two keyframes that the easing effects apply to. It has no effect if the Interpolation None Only Distance. Only Angles. Both Angles and Distance. Undo Ctrl-Z Undoes the previous cut segment. The starting point for the next cut is adjusted accordingly. If a cut is a drag cut, the entire

interpolated, whatever option you chose. 缓动(通过强度)。 Different methods of easing interpolations for F-curve segment. The "Robert Penner easing equations" (basically, equations which define some preset ways that one 淡⼊: 淡出: 淡⼊淡出: ⾃动: 周期属性控制振荡发⽣的频率。较⾼的值导致更密 集的振荡。 缓动 The Easing Type controls which end of the segment between the two keyframes that the easing effects apply to. It has no effect if the Interpolation None Only Distance. Only Angles. Both Angles and Distance. Undo Ctrl-Z Undoes the previous cut segment. The starting point for the next cut is adjusted accordingly. If a cut is a drag cut, the entire

淡⼊: 淡出: 淡⼊淡出: ⾃动: 周期属性控制振荡发⽣的频率。较⾼的值导致更密 集的振荡。 缓动 The Easing Type controls which end of the segment between the two keyframes that the easing effects apply to. It has no effect if the Interpolation None Only Distance. Only Angles. Both Angles and Distance. Undo Ctrl-Z Undoes the previous cut segment. The starting point for the next cut is adjusted accordingly. If a cut is a drag cut, the entire new edges formed by the bevel (or the edges on either side of the bevel if there is more than one segment). 深度 原始边到倒⾓⾯的垂直距离。 百分⽐ The percentage of the length of adjacent edges that the new edges is slided

new edges formed by the bevel (or the edges on either side of the bevel if there is more than one segment). Depth The perpendicular distance from the original edge to the bevel face. Percent The percentage number with mouse movements, as well as numeric input. Alternatively, you can manually enter a segment number value while using the tool, or in the Mesh Tool options panel after using the tool. Bevel new edges formed by the bevel (or the edges on either side of the bevel if there is more than one segment). 百分⽐ 新边线滑移距离相对邻边长度的百分⽐。 Absolute The exact distance along edges adjacent to the beveled edge