阿里云 OSS-HDFS 服务（JindoFS 服务）元数据导出使用说明§
(从 4.6.0 开始支持)
介绍§
使用元数据导出功能，可以将当前 OSS-HDFS bucket 下的文件元数据清单导出到 OSS 上的，格式为 json 文件，方便用户对元数据进行统计分析
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配置 JindoFS 命令行工具，配置对应 OSS-HDFS bucket 的访问密钥，参考 JindoFS 命令行工具使用说明
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执行导出命令
./jindofs admin -dumpInventory oss://<hdfs_bucket>/
此时可以观察到输出路径
============Dump Inventory=============
Job Id: 2ce40fba-5704-45c4-8720-d92a891d5cfd
Data Location: oss://<oss_bucket>/.dlsdata/.sysinfo/meta_analyze/inventory/1666584461201.2ce40fba-5704-45c4-8720-d92a891d5cfd
.....................................................................................................................
FINISHED.
该命令为阻塞命令，请耐心等待10秒钟~10分钟（根据元数据量大小），知道最后输出FINISHED表示导出成功。
- 下载结果文件 使用 jindo 命令行工具（配置普通OSS的key非OSS-HDFS） 、或ossutil、或使用Hadoop fs 命令、或在OSS控制台页面，下载结果文件。
ossutil cp oss://<oss_bucket>/.dlsdata/.sysinfo/meta_analyze/inventory/1666584461201.2ce40fba-5704-45c4-8720-d92a891d5cfd ./
下载到本地，使用vi/vim打开即可。
示例结果参考
{"id":16385,"path":"/","type":"directory","size":0,"user":"admin","group":"supergroup","atime":0,"mtime":1666581702933,"permission":511,"state":1}
{"id":6246684106789500068,"path":"/dls-1000326249","type":"directory","size":0,"user":"hadoop","group":"supergroup","atime":0,"mtime":1660889124590,"permission":511,"state":0}
{"id":6246684106789500069,"path":"/dls-1000326249/benchmark","type":"directory","size":0,"user":"hadoop","group":"supergroup","atime":0,"mtime":1660889124590,"permission":511,"state":0}
{"id":6246684106789500070,"path":"/dls-1000326249/benchmark/n1","type":"directory","size":0,"user":"hadoop","group":"supergroup","atime":0,"mtime":1660889124590,"permission":511,"state":0}
{"id":6246684106789500071,"path":"/dls-1000326249/benchmark/n1/490747449","type":"directory","size":0,"user":"hadoop","group":"supergroup","atime":0,"mtime":1660895613953,"permission":511,"state":0}