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== Measuring Information Availability( 衡量信息可用性 ) == I. Mean Time Between Failure( MTBF ) I. Mean Time to Repair( MTTR ) == BC == === RPO === * Point-in-time to which systems and data must be recovered after an outage. * Amount of data loss that a business can endure === RTO === * Time within shich systems and applications must be recovered after an outage * Amount of downtime that a business can endure and survice. |
Contents
ISM Day 3
SDDC
EMC ViPR Controller, ECS and ScaleIO
Network Stack Comparison
SCSI --> SCSI->Physical
FCIP --> SCSI->FC->FCIP-TCP-IP->Ethernet->FCIP->Physical (远程FC SAN环境容灾场景)
FCoE --> SCSI->FE_>FCoE-Ethernet->FCoE->Physical
FC --> SCSI->FC->Physical
FC Protocol Stack
FC Flow Control
- BB_Credit保证
NPV
- NPV交换机跟NPIV交换机连接的那个端口叫NP_port（NPIV交换机端口还是F_port）
- 支持NPV的交换机用作直通设备(不需要ID domain，不执行连接结构服务）
- 解决了连接结构中的Domain_ID数量激增问题。
iSCSI Addresses and Name
- IQN: iSCSI Qualified Name
- EUI: Extended Unique Identifier
- NAA: Network Address Authority
Link aggregation
- 提高吞吐量
- 分发流量
延伸VLAN(Stretched VLAN)
- A VLAN that spans multiple sites and enables OSI Layer 2 communication between a group of nodes over an OSI Layer 3 WAN infrastructure, independent of their physical location.
FCIP
Merged Fabric
E-->FCIP gateway E--> VE--VE --> FCIP gateway E-->Storage SAN-E
CEE
- PFC: Priority-Based Flow Control( 8 virtual links on a single physical link )
- ETS: Enhanced Transmission Selection
- CN: Congestion Notification( )
- DCBX:
Measuring Information Availability( 衡量信息可用性 )
- Mean Time Between Failure( MTBF )
- Mean Time to Repair( MTTR )
BC
RPO
- Point-in-time to which systems and data must be recovered after an outage.
- Amount of data loss that a business can endure
RTO
- Time within shich systems and applications must be recovered after an outage
- Amount of downtime that a business can endure and survice.