MongoDB GridFS 初探
使用GridFS简单介绍：列出文件：
# mongofiles list
connected to: 127.0.0.1
此时并没有任何文件存在。
上传文件：
# 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：
# mongofiles list -d libraray
connected to: 127.0.0.1
install.log 9458
查看MongoDB中的数据：
# 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：
# cat testfile
hello abc
# 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!
# 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：
# mongofiles delete testfile -d libraray
connected to: 127.0.0.1
done!
# mongofiles search test -d libraray
connected to: 127.0.0.1
获取文件：
# ls
anaconda-ks.cfginstall.loginstall.log.syslogmodbtestfile
# rm -rf install.log
# mongofiles get install.log -d libraray
connected to: 127.0.0.1
done write to: install.log
# ls
anaconda-ks.cfginstall.loginstall.log.syslogmodbtestfile
测试上传大文件：
# du -h 2290944.zip
3.2G 2290944.zip
# mongofiles put2290944.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 }
总共有12918个chunk（第一个chunk为0），将12918 × 261120>
页:
[1]