vSAN性能优化内容.ppt

1、VMware vSAN 6.6,产品介绍及Anybackup适配注意事项,2,VMware vSAN,Radically Simple Hypervisor-Converged Storage for VMs,VMware vSphere + vSAN,vSAN Datastore,3,vSAN Stretched Cluster,Active-Active data centers,VMware vSAN群集分为两个站点！ 每个站点都是故障域（FD） 站点级保护，零数据丢失和近瞬时恢复 自动故障转移,5ms RTT, 10GbE,Today,VMware vSphere & vSAN,支持数

2、据站点之间最多5毫秒的RTT延迟 10 Gbps带宽 需要见证服务器,4,vSAN 架构,Hybrid,All-Flash,40K IOPS per Host,90K IOPS per Host,Caching,Read and Write Cache,Writes cached 100%. Reads go directly to capacity tier,Capacity Tier SAS/NL SAS/SATA/Direct-attached JBOD,Capacity Tier Flash Devices Reads go directly to capacity tier,Data

3、 Persistence,vSAN,SSD,PCI-e,Ultra DIMM,SSD,PCI-e,Ultra DIMM,混合环境极有可能存在性能瓶颈，Anybackup备份此类环境需要检查一下是否是混合模式，vsan底层默认将缓存区域的70%用于读，30%用于写；热数据自动替换冷数据；缓存最佳实践是数据量的10%,1.判断架构类型,5,RAID-5 Inline Erasure Coding,When Number of Failures to Tolerate = 1 Failure Tolerance Method = Capacity RAID-5 3+1 (4 host minimum

4、) 1.33x instead of 2x overhead 20 GB disk consumes 40 GB with RAID-1, now consumes 27 GB with RAID-5,RAID-5,All Flash Only,6,RAID-6 Inline Erasure Coding,When Number of Failures to Tolerate = 2 Failure Tolerance Method = Capacity RAID-6 4+2 (6 host minimum) 1.5x instead of 3x overhead 20 GB disk con

5、sumes 60 GB with RAID-1, now consumes 30 GB with RAID-6,All Flash Only,RAID-6,7,硬件兼容性要求,Any server in the VMware Compatibility Guide,All hardware must be listed in the VMware Compatibility Guide vSAN,2.判断硬件兼容,8,Flash-Based Devices (cont.),VMware SSD Performance Classes Class B: 5,000-10,000 writes p

6、er second Class C: 10,000-20,000 writes per second Class D: 20,000-30,000 writes per second Class E: 30,000-100,000 writes per second Class F: 100,000+ writes per second Examples Intel DC S3700 SSD 36000 writes per second - Class E Toshiba SAS SSD MK2001GRZB 16000 writes per second - Class C,Workloa

7、d Definition Queue Depth: 16 or less Transfer Length: 4KB Operations: Write Pattern: 100% random Latency: less than 5 ms Endurance Terabyte writes per lifetime of the device Class A: = 365 TBW Class B: = 1825 TBW Class C: = 3650 TBW Class D: = 7300 TBW,3.判断SSD性能,9,Network,优化判断内容： 1.二层物理交换机启用组播 2.VSA

8、N虚拟端口、虚拟交换机、二层物理交换机支持巨型帧，MTU=9000 -启用巨型帧可以降低群集的资源开销 3.VSAN6.6之前需要开启二层物理交换机组播，6.6版本及以后不再依赖组播，使用不同流量分流即可 4.VSAN环境不同的流量进行vlan及物理分流（管理流量、vMotion流量、vSAN流量、虚机业务）,4.判断网络设置,10,Firewall Ports,vSAN Vendor Provider (VSANVP) Inbound and outbound TCP 8080 vSAN Clustering Service (CMMDS) Inbound and outbound UDP

9、12345 23451 vSAN Transport (RDT) Inbound and outbound TCP 2233,11,vSAN Compatibility Guide,1,2,1,2,vSAN Hardware Quick Reference Guide Five ReadyNode profile guidelines Sizing assumptions Design considerations,vSAN ReadyNode Configurator List components and quantity that make up each ReadyNode Information on how to quote/order the ReadyNode,3,Always use certified components! ReadyNode types Drivers and firmware Supportability Increases customer satisfaction Reduces rework and time-to-market,3,12,vSAN Datastore Considerations,存储策略直接影响实际可用容量和性能 -每个对象的磁盘