下面以ambari数据表 racks和 hosts表为例,制作的一条get类型的api,其中根据racks表中的rackname字段值和hosts表中的rackinfo字段值判断数据是否关联。...二、最终效果 请求方式:http://ip:8080/api/v1/racks?...fields=rack_hosts 请求类型:GET { href: "http://ip:8080/api/v1/racks?...fields=rack_hosts", items: [ { href: "http://ip:8080/api/v1/racks/%2Frack1",...}, rack_hosts: [ { href: "http://ip:8080/api/v1/racks
image.png 显示文件由那些块构成 hdfs fsck /spark2-history/application_1608084068201_452033_1 -files -blocks -racks...显示文件由那些块构成 -files:显示文件的文件名称、大小、块数量及是否可用; -blocks: 显示每个块在文件中的信息,一个块用一行显示; -racks: 展示了每个块所处的机架位置及DataNode...ugi=hdfs&files=1&blocks=1&racks=1&path=%2Fspark2-history%2Fapplication_1608084068201_452033_1 FSCK started...Corrupt blocks: 0 Missing replicas: 0 (0.0 %) Number of data-nodes: 100 Number of racks
[-list-corruptfileblocks | [-move | -delete | -openforwrite] [-files [-blocks [-locations | -racks...belong to -blocks print out block report -locations print out locations for every block -racks...summary for the blocks -blockId print out which file this blockId belongs to, locations (nodes, racks...Corrupt blocks: 0 Missing replicas: 0 (0.0 %) Number of data-nodes: 3 Number of racks...Corrupt blocks: 0 Missing replicas: 0 (0.0 %) Number of data-nodes: 3 Number of racks
0 Missing replicas: 760 (22.028986 %) Number of data-nodes: 2 Number of racks...Feb2621_webpage/c23aa183c7cb86af27f15d4c2aee2795/s/30bee5fb620b4cd184412c69f70d24a7 -files -blocks -racks... 0 Missing replicas: 1 (50.0 %) Number of data-nodes: 2 Number of racks...hadoop fsck -files Usage: DFSck [-move | -delete | -openforwrite] [-files [-blocks [-locations | -racks...-blocks print out block report -locations print out locations for every block -racks
fsck [-list-corruptfileblocks | [-move | -delete | -openforwrite] [-files [-blocks [-locations | -racks...files they belong to -blocks print out block report -locations print out locations for every block -racks...policy summary for the blocks -blockId print out which file this blockId belongs to, locations (nodes, racks...print out list of missing blocks and files they belong to -blocks 打印出block报告 -locations 打印出每个block的位置 -racks
当replicas大于或等于racks数量时,则每个rack至少有个一replica;否则的话,每个rack至多一个replica。...在理想的情况下,replicas与racks相等,每个rack有着相同数目的broker,这样保证了broker和rack之间的replica均衡分布。...1. there is already a broker in the same rack that has assigned a replica AND there is one or more racks
HDFS fsck hdfs fsck Usage: DFSck [-move | -delete | -openforwrite] [-files [-blocks [-locations | -racks...打印block报告 (需要和-files参数一起使用) -locations 打印每个block的位置信息(需要和-files参数一起使用) -racks
分片分配感知(Shard Allocation Awareness)和强制感知(Forced Awareness)控制如何在不同的racks或可用性zones分配分片。...cluster.routing.allocation.disk.watermark.flood_stage": "10gb", "cluster.info.update.interval": "1m" } } ' 分片分配意识 在同一物理服务器上...、在多个racks上、在跨多个zones或domains运行多个虚拟机上的节点时,同一物理服务器上、同一racks上、同一zones或domains中的两个节点更有可能同时崩溃,而不是两个不相关的节点同时崩溃...如果 Elasticsearch 知道(aware)硬件的物理配置,它可以确保主分片及其副本分片分布在不同的物理服务器、racks或zones中,以最小化同时丢失所有分片副本的风险。...例如,假设我们有几个racks。当我们启动一个节点时,我们可以通过给它分配一个称为rack_id的任意元数据属性来告诉它在哪个rack中,我们可以使用任何属性名。例如: .
需要的网络设备也略有不同 首先由32x400G构成最基础的单元 数据中心网络与800G迄今为止最好的分享 然后由32台交换机 组成42 RU高度的机柜 提供100T的网络总带宽能力 最后32个Racks
例如,bike_racks 要素类位于名为 WGS 1984 的地理坐标系中,而 roads 和 boundary 要素类位于经过投影的美国国家平面坐标系(马里兰州)NAD 1983 StatePlane...['bus_lines', 'boundary', 'street_lights', 'roads', 'traffic_analysis_zones', 'bike_routes', 'bike_racks...traffic_analysis_zones : NAD_1983_StatePlane_Maryland_FIPS_1900_Feet bike_routes : GCS_WGS_1984 bike_racks...traffic_analysis_zones : NAD_1983_StatePlane_Maryland_FIPS_1900_Feet : 复制成功 bike_routes : GCS_WGS_1984 : 投影成功 bike_racks
files: 输出正在被检测的文件 blocks: 输出block的详细报告 (需要和-files参数一起使用) locations: 输出block的位置信息 (需要和-files参数一起使用) racks...输出文件块位置所在的机架信息(需要和-files参数一起使用 查看HDFS中某个文件的块block分布 hadoop fsck /your_file_path -files -blocks -locations -racks
去年微软Natick 水下数据中心项目二期收官 再次引得PUE爱好者的一片欢呼 12 racks 864 servers+FPGA加速 27.5 petabytes of storage 神奇之处在于
Display a tree of racks and datanodes attached to the tracks as viewed by the NameNode....● Need to spread different replicas of a block across the racks so that cluster can survive loss of...Rack Awareness机架感知 Typically large Hadoop clusters are arranged in racks and network traffic between...different nodes with in the same rack is much more desirable than network traffic across the racks....In addition NameNode tries to place replicas of block on multiple racks for improved fault tolerance.
集群使用hadoop-1.0.3 有些hadoop集群在运行的时候,不完全是绝对平均的分配,不过需要尽可能平均的分配任务,避免某一台或者某几台服务器任务过重,其他服务器无事可做。...不过,机架感知,不是说是感知哪个服务器坏了,是根据机架位置的拓扑结构来选取服务器进行任务的权重分配。...--机架服务器数量,由于我写了20个,所以这里写20--> 然后重启hadoop的namenode和jobtracker,可以在logs里看下namenode和jobtracker..... 2012-06-08 14:42:49,492 INFO org.apache.hadoop.hdfs.StateChange: STATE* Network topology has 2 racks
computing hardware technologies : -standardized racks机架 with interconnects for power, network, and internal...processing architectures -Hundreds of a power-efficient multi-core CPU architecture in unit of standardized racks...Server Consolidation 服务器整合 Coordination function of virtualization software -multiple virtual servers...to be simultaneously created in the same virtualization host server consolidation服务器整合 -Virtualization...that rely on the use of core Web technologies The six REST design constraints: Client-Server 客户端-服务器
crush.png 在服务器资源不足,或者测试环境下,Ceph 通常只有一个节点,就算有多个服务器组成集群,往往存储服务器也往往只有一台,Ceph 的默认配置下,只能设置单数据备份,也就是说数据只存了一份...10 step take default step chooseleaf firstn 0 type host step emit } 我们可以看到,Ceph 集群中只有一台存储服务器...默认配置出问题的地方就是在叶子节点的类型上,osd_pool_default_size 默认值是三,也就是说,需要找三个 host 类型的 bucket,host 对应的就是存储服务器,我们现在只有一个...multi chassis cluster with multiple hosts in a chassis #3 for a multi node cluster with hosts across racks...etc. osd crush chooseleaf type = {n} 集群是使用 ceph-deploy 来部署的,所以需要修改 ceph-deploy 目录下的文件,然后推送到 ceph 集群中的服务器中
Compressor control system network is a Ring network composed of a pair of redundant controllers, 2 IO racks
******************************** Corrupt blocks: 9 Number of data-nodes: 4 Number of racks...replication: 0.0 Corrupt blocks: 1 Missing replicas: 0 Number of data-nodes: 4 Number of racks
用法:hadoop fsck [GENERIC_OPTIONS] [-move | -delete | -openforwrite] [-files [-blocks [-locations | -racks...-racks 打印出data-node的网络拓扑结构。
最近,微软又公开宣布,将其服务器浸入“浴缸中”,以提高其性能和能效。 是的你没听错,微软给服务器造了一批“沙发水箱”,将高效运转的服务器浸入其中,通过沸腾效应降温。...乍一看还真像是把服务器放进了按摩浴缸中不过泡服务器的液体,并不是常见的水,是一种特殊的液体,对电子设备无害,其沸点比水低很多,为122华氏度(50摄氏度)。...服务器工作时产生的热量很容易让这些液体沸腾,沸腾效应会将热量从计算机处理器中带走。这一低温煮沸可以使服务器能够在全功率下连续运行,而不会因过热而导致故障。...微软为其液体浴服务器提供的专用容器。 图片:微软 微软的可持续数据中心开发目标 其实,微软早在2014年就产生了探索水下服务器的想法。...datacenter-liquid-cooling/ https://www.theverge.com/2021/4/6/22369609/microsoft-server-cooling-liquid-immersion-cloud-racks-data-centers
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