《2_Level2+_信息高可用及DS5000解决方案_20163Q》.ppt

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 这是p和x服务器与存储构成，服务器集群加双存储的高可靠结构 * * * DS3/4/5000 + SVC优势 The lowest cost IBM System Storage for SVC High Value, Lowest CAP-EX and OP-EX Feature compatibility with SVC Don’t paying for features twice Support for Multi-tiered Storage High Availability with Full Redundancy High Throughput AND Low Latency drive access Critical for feeding SVC’s large virtual cache Unified IBM Support, Services Installation, Training, Service, Support XX 省移动公司 —— 虚拟化架构 DS5000 远程镜像 Overview Part of a disaster recovery solution Allows logical drive mirroring between DS5000/DS4000 family Premium Feature key required Supported Systems DS5000/DS4000 Firmware06.10.xx or above 3 Write Modes Metro Mirror ...　synchronous write mode Global Copy ...　asynchronous write mode Global Mirror ...　asynchrounous write mode + consistency group For database recovery 　 Group multiple mirror pairs into one group and maintain write order Suspend and Resume Resume mirroring from the point where you left off (differential synchronization) Access to Secondary Volume You can take a FlashCopy from a secondary while mirroring is taking place Read only access Supported Mirror Pairs DS5000/4800 ???　128 mirrors per subsystem DS4700/DS4200??? 64 mirrors per subsystem 镜像库逻辑盘 Mirror Repository Logical Drive Mirror Repository (128MB/ctrl） InFlight Log*1 Delta Log*2 Mirror Pair#1 *1 Records the volume ID (SSID), Logical Block Address (LBA), and the Block Count. This part of the log is used during a synchronized state. Used commonly by Metro Mirror, Global Copy, Global Mirror write modes. For Global Copy and Mirror, up to a 128 outstanding write logs (writes that haven’t been copied yet to the secondary) can be queued here *2 Records the logical block address and block count in a bitmap format. This is used to keep trackof changes between the primary and secondary once in an unsynchronized state. This will be used later on for synchroniz