Mongo version is 3.4.7

Using GridFS access picture

The code below

 
/* * 
* save the file 
* @ param collectionName 
* @ param mongoFile 
*/
Public Boolean saveFiles (String collectionName, MongoFile MongoFile) {
Try {
//DB DB=mongoTemplate. GetDb (); 
//DBCollection mongdb_pic=the getCollection (collectionName); 
//DBObject DBObject=new BasicDBObject (); 
//if (mongoFile getFile ()!=null) {
.//byte [] bytes=FileUtil file2byte (mongoFile. GetFile ()); 
//
//Binary Binary=new Binary (bytes); 
//dbObject. Put (" imgByte, "binary); 
//} 
//dbObject. Put (" id ", mongoFile getId ()); 
//dbObject. Put (" fileName ", mongoFile getFileName ()); 
//dbObject. Put (" fileSize, mongoFile getFileSize ()); 
//dbObject. Put (" descs ", mongoFile getDescs ()); 
//dbObject. Put (" fileType, mongoFile getFileType ()); 
//dbObject. Put (" contentType ", mongoFile getContentType ()); 
//dbObject. Put (" oldName ", mongoFile getContentType ()); 
//mongdb_pic. Save (dbObject); 

The DB DB=mongoTemplate. GetDb (); 
The GridFS GridFS=new GridFS (db, collectionName); 
GridFSInputFile GFS=gridFS. CreateFile (mongoFile getFile ()); 
System. The out. Println (" file size: "+ mongoFile. GetFile (). The length ()); 
GFS. SetChunkSize (mongoFile. GetFile (). The length ()); 
GFS. SetFilename (mongoFile getFileName ()); 
GFS. Put (" _id ", mongoFile getId ()); 
GFS. Put (" fileName ", mongoFile getFileName ()); 
GFS. Put (" fileSize, "mongoFile getFileSize ()); 
GFS. Put (" descs ", mongoFile getDescs ()); 
GFS. Put (" fileType, "mongoFile getFileType ()); 
GFS. Put (" contentType, "mongoFile getContentType ()); 
GFS. Put (" oldName ", mongoFile getOldFileName ()); 
GFS. The save (); 
} the catch (Exception e) {
Data logger. The error (" Mongo operation & gt;> Storing files sent wrong & gt;> Error: "+ e. oString ()); 
e.printStackTrace(); 
return false; 
} 
return true; 
} 

/* * 
* the query file 
* @ param collectionName 
* @ param filename 
* @ return 
*/
Public GridFSDBFile retrieveFileOne (String collectionName, String filename) {
Try {
The DB DB=mongoTemplate. GetDb (); 
The GridFS GridFS=new GridFS (db, collectionName); 
GridFSDBFile dbfile=gridFS. FindOne (filename); 
If (dbfile!=null) {
Return dbfile; 
} 
} the catch (Exception e) {
Data logger. The error (" Mongo operation & gt;> Get the error to the file & gt;> Error: "+ e. oString ()); 
e.printStackTrace(); 
} 
return null; 
} 

CodePudding user response:

Use mongofiles to see how long will take picture when

CodePudding user response:

reference 1st floor rucypli response:

use mongofiles to see how long will take picture when

how to take pictures of time
./mongofiles -d preFileDb get "1. JPG"
How to display the execution time

CodePudding user response:

reference 1st floor rucypli response:

use mongofiles to see how long will take picture when

Take pictures 877 KB silently and calculated that about four seconds, this is why ah, don't understand,

CodePudding user response:

refer to the second floor javalearnNet response:

Quote: refer to 1st floor rucypli response:

Use mongofiles to see how long will take picture when

how to take pictures of time
./mongofiles -d preFileDb get "1. JPG"
How to display the execution time

Time./mongofiles - d preFileDb get "1. JPG"

CodePudding user response:

reference javalearnNet reply: 3/f

Quote: refer to 1st floor rucypli response:

Use mongofiles to see how long will take picture when

Take pictures 877 KB silently and calculated that about four seconds, this is why ah, don't understand.

Perform a few times try there may not be cached in memory

CodePudding user response:

reference 5 floor rucypli reply:

Quote: refer to the third floor javalearnNet response:

Quote: refer to 1st floor rucypli response:

Use mongofiles to see how long will take picture when

Take pictures 877 KB silently and calculated that about four seconds, this is why ah, don't understand.

Perform a few times may not be cached in memory test under

Perform a lot of times, is also a ali cloud server, on my own server, memory of 4 g, execute the same command also soon, in the company is very slow, this is why, with numa

CodePudding user response:

Start the mongo I also perform numactl - interleave=all, didn't take effect? This is, strange, development environment, test environment, production environment has a problem,

CodePudding user response:

Another direct access to the cloud disk high availability of this method is not recommended because there is no mechanism

CodePudding user response:

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