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今天就跟大家聊聊有关 MongoDB 中 GridFS 如何使用,可能很多人都不太了解,为了让大家更加了解,丸趣 TV 小编给大家总结了以下内容,希望大家根据这篇文章可以有所收获。
使用 GridFS 简单介绍:
列出文件:
[root@localhost ~]# mongofiles list
connected to: 127.0.0.1
此时并没有任何文件存在。
上传文件:
[root@localhost ~]# mongofiles put install.log -d libraray
connected to: 127.0.0.1
added file: {_id: ObjectId( 5616b8c4f1403ca60b0999d0), filename: install.log , chunkSize: 261120, uploadDate: new Date(1444329668441), md5: c7d8a01a077940859e773b7770d2e07e , length: 9458 }
done!
再次列出上传的文件:
[root@localhost ~]# mongofiles list -d libraray
connected to: 127.0.0.1
install.log 9458
查看 MongoDB 中的数据:
[root@localhost ~]# mongo libraray
MongoDB shell version: 2.6.11
connecting to: libraray
db.fs.files.find()
{_id : ObjectId( 5616b8c4f1403ca60b0999d0), filename : install.log , chunkSize : 261120, uploadDate : ISODate(2015-10-08T18:41:08.441Z), md5 : c7d8a01a077940859e773b7770d2e07e , length : 9458 }
指定 id:
db.fs.files.find({_id : ObjectId( 5616b8c4f1403ca60b0999d0)})
{_id : ObjectId( 5616b8c4f1403ca60b0999d0), filename : install.log , chunkSize : 261120, uploadDate : ISODate(2015-10-08T18:41:08.441Z), md5 : c7d8a01a077940859e773b7770d2e07e , length : 9458 }
db.fs.chunks.find({},{ data :0})
{_id : ObjectId( 5616b8c4d2b40c73cbf811c8), files_id : ObjectId(5616b8c4f1403ca60b0999d0), n : 0 }
搜索文件:
[root@localhost ~]# cat testfile
hello abc
[root@localhost ~]# mongofiles put testfile -d libraray
connected to: 127.0.0.1
added file: {_id: ObjectId( 5616bd093be512c2e45d0351), filename: testfile , chunkSize: 261120, uploadDate: new Date(1444330761770), md5: 563427968920fcf5177c6753bd6cbae3 , length: 10 }
done!
[root@localhost ~]# mongofiles search test -d libraray
connected to: 127.0.0.1
testfile 10
(貌似无法搜索文件内容!!!)
删除文件:
[root@localhost ~]# mongofiles delete testfile -d libraray
connected to: 127.0.0.1
done!
[root@localhost ~]# mongofiles search test -d libraray
connected to: 127.0.0.1
获取文件:
[root@localhost ~]# ls
anaconda-ks.cfg install.log install.log.syslog modb testfile
[root@localhost ~]# rm -rf install.log
[root@localhost ~]# mongofiles get install.log -d libraray
connected to: 127.0.0.1
done write to: install.log
[root@localhost ~]# ls
anaconda-ks.cfg install.log install.log.syslog modb testfile
测试上传大文件:
[root@localhost ~]# du -h 2290944.zip
3.2G 2290944.zip
[root@localhost ~]# mongofiles put 2290944.zip -d libraray
connected to: 127.0.0.1
added file: {_id: ObjectId( 5616c158bfb7f87bb8e48d44), filename: 2290944.zip , chunkSize: 261120, uploadDate: new Date(1444331976703), md5: 6fc45dd991d89db358194eba0b565f30 , length: 3372909855 }
done!
db.fs.chunks.find({files_id :ObjectId( 5616c158bfb7f87bb8e48d44)},{data :0}).sort({n:-1}).limit(1)
{_id : ObjectId( 5616c1a2d2b40c73cbf84467), files_id : ObjectId(5616c158bfb7f87bb8e48d44), n : 12917 }
看完上述内容,你们对 MongoDB 中 GridFS 如何使用有进一步的了解吗?如果还想了解更多知识或者相关内容,请关注丸趣 TV 行业资讯频道,感谢大家的支持。
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