demuxing and muxing. It is useful for changing the container format or modifying container-level metadata toc-Main-options ffmpeg -i show_14322648_audio.mp3 -acodec copy -ss 00:00:03 ffmpeg -i show_14322648_audio Input #0, mp3, from 'show_14322648_audio.mp3': #0, mp3, from 'show_14322648_audio.mp3': Metadata: Metadata: major_brand major_brand :: isom isom minor_version minor_version mp3, 44100 Hz, stereo, fltp, 128 kb #0:0: Audio: mp3, 44100 Hz, stereo, fltp, 128 kb Metadata: Metadata: encoder encoder :: Lavc58.18 Lavc58.18 Output Output

R&D USA, Bellevue WA Agenda • Edge scenarios/characters • KubeEdge Architecture • KubeBus • Edge metadata service • Kubernetes extension • Case study • Water utility management • Campus surveillance system Container Network 10.242.0.0/16 ... Edge Metadata Service • Goal • Offline Edge Metadata Store • Cloud/Edge metadata bi-direction sync • Component • Edge Metadata Store: Etcd • Sync Service: • Mirror data

CRD 2. client-go 配套工具 apiVersion: apiextensions.k8s.io/v1beta1 kind: CustomResourceDefinition metadata: name: mysqlclusters.example.sogou spec: group: example.sogou names: kind: MySQLCluster plural: MySQL-Operator 调用样例 kubectl create –f iflow.yaml apiVersion: "mysql.biz.sogou/v1" kind: MySQLCluster metadata: name: dbiflow namespace: default spec: replicas: 3 version: "5.5" port: 3613 curl -H 'Content-Type: 'Content-Type: application/json' -X POST –d '{ kind: "MySQLCluster", apiVersion: "mysql.biz.sogou/v1", metadata: { name: "dbiflow", namespace: “default"}, spec: { replicas: 3, version: "5.5", port: 3613,

● LEGACY: 所有已存在的桶，升级后变成LEGACY 版本，以⽀持向后兼容 存储Key格式基本同OBS, 通过配置项区分偏向⽂件，还是偏向S3对象的⽀持 引⼊Bucket级别 OM Metadata Layout 版本号 ⽂件系统优化 ⽂件系统优化效果 Query Details: Dropped “catelog_sales” table with sub- paths(files/dirs)

I/O 越少，一般是内存的一半，不超过 2G ， 否则系统会崩溃，这个参数非常重要 innodb_additional_mem _pool_size 2M 512M InnoDB 用来保存 metadata 信息 , 如果内存是 16G ，最好本值超 1024M innodb_flush_log_at_trx _commit 1 0 0 代表日志只大约每秒写入日志文件并且日志文件 刷新到磁盘