Background in compilers and embedded systems... 2Motive? 3Motive: Can it be done in C++? 4Session type 5Session type ? 6"A normal adult programmer never gives a thought about types. That is something C++, we can settle with this explanation: But that is not what “type” in “Session type” means. 28Session type ? 29Session? • Interaction of two or more entities. • It has a beginning and (usually) interactions is happening. 30Session? • Can we describe a valid sequence of interactions? • Interaction diagram Client Server int int ADD DIV int double end Branching 31Session? • Can we describe a

operating system specific source of the seed. 22 1 Introduction • --timeout (or -t): This specifies the session timeout, in seconds, and defaults to 300 (five minutes). A web service client that has logged on the web service. Logon is necessary for the web service to be stateful; internally, it maintains a session for each client that connects to it. The IWebsessionManager::logon() API takes a user name and a introduces a session manager (by way of the IWebsessionManager interface), which manages object references. Any client wishing to interact with the web service must first log on to the session manager and

operating system specific source of the seed. 22 1 Introduction • --timeout (or -t): This specifies the session timeout, in seconds, and defaults to 300 (five minutes). A web service client that has logged on the web service. Logon is necessary for the web service to be stateful; internally, it maintains a session for each client that connects to it. The IWebsessionManager::logon() API takes a user name and a introduces a session manager (by way of the IWebsessionManager interface), which manages object references. Any client wishing to interact with the web service must first log on to the session manager and

operating system specific source of the seed. 24 1 Introduction • --timeout (or -t): This specifies the session timeout, in seconds, and defaults to 300 (five minutes). A web service client that has logged on the web service. Logon is necessary for the web service to be stateful; internally, it maintains a session for each client that connects to it. The IWebsessionManager::logon() API takes a user name and a introduces a session manager (by way of the IWebsessionManager interface), which manages object references. Any client wishing to interact with the web service must first log on to the session manager and

operating system specific source of the seed. 24 1 Introduction • --timeout (or -t): This specifies the session timeout, in seconds, and defaults to 300 (five minutes). A web service client that has logged on the web service. Logon is necessary for the web service to be stateful; internally, it maintains a session for each client that connects to it. The IWebsessionManager::logon() API takes a user name and a introduces a session manager (by way of the IWebsessionManager interface), which manages object references. Any client wishing to interact with the web service must first log on to the session manager and

operating system specific source of the seed. 20 1 Introduction • --timeout (or -t): This specifies the session timeout, in seconds, and defaults to 300 (five minutes). A web service client that has logged on the web service. Logon is necessary for the web service to be stateful; internally, it maintains a session for each client that connects to it. The IWebsessionManager::logon() API takes a user name and a introduces a session manager (by way of the IWebsessionManager interface), which manages object references. Any client wishing to interact with the web service must first log on to the session manager and

operating system specific source of the seed. 19 1 Introduction • --timeout (or -t): This specifies the session timeout, in seconds, and defaults to 300 (five minutes). A web service client that has logged on the web service. Logon is necessary for the web service to be stateful; internally, it maintains a session for each client that connects to it. The IWebsessionManager::logon() API takes a user name and a introduces a session manager (by way of the IWebsessionManager interface), which manages object references. Any client wishing to interact with the web service must first log on to the session manager and

方案设计思考 1.Trash机制是实现1个(类似chubaofs)，还是2个（类似moosefs）？ 2. Trash放在哪里？ 3. 是否需要做session机制（在metaserver打开），来维护inode的打开情况？ 方案设计 Trash机制： Session机制： 遗留问题 工作量评估 背景 目前curvefs client版本对删除unlink和rmdir的设计只有简单的删除in 所以不影响它对该文件的读写操作，当所有客户端都关闭该文件后，该文 件节点才会从 被清除。 reserve 使用了session机制，记录client端的open状态 通过META文件系统访问reserve 使用CUTOMA_FUSE_RESERVED_INODES消息保持和释放inode 实现了Timer，定期判断是否还有session，如果没有client打开，则进行清理。 优点： 通过meta文件系统来管理trash，更为优雅。© chubaofs也实现了查询机制，来查询处于freelist当中的inode的情况，以便与运维，这一部分没有细看。 优点： 实现简单，开发代价小，且后续可以增加metaserver端打开(session)等机制，向着moosefs的演进也是可以的。 我们的整个架构设计本身就类似chubao方式，这个方案本身是chubaofs的成熟方案，说明是已经被验证过是可行的方案。 缺点： 由于link

面分别说明这三个组件的可用性、单个实例失效后的后果以及如何恢复。 TiDB TiDB 是无状态的，推荐至少部署两个实例，前端通过负载均衡组件对外提供服务。当单个实例失效时，会影响 正在这个实例上进行的 Session，从应用的角度看，会出现单次请求失败的情况，重新连接后即可继续获得服 务。单个实例失效后，可以重启这个实例或者部署一个新的实例。 PD PD 是一个集群，通过 Raft 协议保持数据的一致性，单个实例失效时，如果这个实例不是 面分别说明这三个组件的可用性、单个实例失效后的后果以及如何恢复。 TiDB TiDB 是无状态的，推荐至少部署两个实例，前端通过负载均衡组件对外提供服务。当单个实例失效时，会影响 正在这个实例上进行的 Session，从应用的角度看，会出现单次请求失败的情况，重新连接后即可继续获得服 务。单个实例失效后，可以重启这个实例或者部署一个新的实例。 PD PD 是一个集群，通过 Raft 协议保持数据的一致性，单个实例失效时，如果这个实例不是 ---------------------|----------+ 10. 4 rows in set (0.00 sec) 空表。 空表。 SESSION_VARIABLES 表提供了关于 session 变量的信息。表中的数据跟 SHOW SESSION VARIABLES 类似。 统计信息的表。 1. mysql> desc statistics; 2. +---------------|-

use the following command line: hdiutil attach /path/to/VirtualBox-xyz.dmg Then open a terminal session and execute: sudo installer -pkg /Volumes/VirtualBox/VirtualBox.pkg -target /Volumes/Macintosh\ HD VirtualBox on Solaris requires root permissions. To perform the uninstallation, start a root terminal session and execute: pkgrm SUNWvbox After confirmation, this will remove VirtualBox from your system. If open a root terminal session and execute: pkgadd -d VirtualBox-4.3.36-SunOS-x86 -n -a autoresponse SUNWvbox To perform a non-interactive uninstallation, open a root terminal session and execute: pkgrm -n