blob

I need to store huge amount of binary files (10 - 20 TB, each file ranging from 512 kb to 100 MB). I need to know if Redis will be efficient for my system. I need following properties in my system: High Availability Failover Sharding I intend to use a cluster of commodity hardware to reduce costing as much as possible. Please suggest pros and cons of building such a system using Redis. I am also concerned about high ram requirements of Redis. I would not use Redis for such a task. Other products will be a better fit IMO. Redis is an in-memory data store. If you want to store 10-20 TB of data,

Hi i want to upload an image and store it the database i use spring mvc & hibernate here is the model import java.sql.Blob; import java.util.Date; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.Lob; import javax.persistence.Table; @Entity @Table(name = "article") public class Article { @Id @GeneratedValue @Column(name = "article_id") private Long articleId; @Column(name = "article_name", nullable = false, length=20) private String articleName; @Column(name = "article_desc",

I have an sqlite table that contains a BLOB file, but need to do a size/length check on the blob, how do I do that? According to some documentation I did find, using length(blob) won't work, because length() only works on texts and will stop counting after the first NULL. My empirical tests have shown this to be true. I'm using SQLite 3.4.2 Updates: So as of SQLite 3.7.6 it appears as though the length() function returns the correct value of blobs - I checked various change-logs of sqlite, but did not see in what version this was corrected. From Sqlite 3.7.6: payload_id|length(payload)|length

1. window.location.href = '请求路径'get方式}2. fetch('请求路径方式拼接上去'get方式).then(res => res.blob().then(blob => { const a = document.createElement('a') const url = window.URL.createObjectURL(blob) const filename = 'aa.xlsx' a.href = url a.download = filename a.click() window.URL.revokeObjectURL(url) }))3.this.exportData.campusId = this.campusIdthis.exportData.time = this.changeTimes(this.createEndTime)axios({ url:'路径' method: '方式', type: 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet', data: 参数, responseType: 'blob', timeout: 120000}).then(response => { const blob = new Blob(

I am getting image from database in blob format. i want to convert it into Bitmap image.the code i used to convert bitmap to Blob is put below.but please tell me how to reverse it.??? ByteArrayOutputStream boas = new ByteArrayOutputStream(); btmap.compress(Bitmap.CompressFormat.JPEG, 100, boas ); //bm is the bitmap object byte[] byteArrayImage = boas .toByteArray(); String encodedImage = Base64.encodeToString(byteArrayImage, Base64.DEFAULT); This will work byte[] byteArray = DBcursor.getBlob(columnIndex); Bitmap bm = BitmapFactory.decodeByteArray(byteArray, 0 ,byteArray.length); Why not make a

字段类型选text型 或blog 区别见： 以下的文章主要介绍的是 MySQL text与blob字段类型的不同之处的比较，同时本文也有对MySQL text与blob字段类型的实际应用的介绍，如果你对MySQL text与blob字段类型相关的实际操作有兴趣的话，你就可以对以下的文章点击观看了。 1. blob是二进制大对象,可以容纳可变量数量的数据,其中blob分为4中类型:TINYBLOB,BLOB,mediumblob和LongBlob,他们容纳的长度是不同的. Text同样也分为四种类型:TINYTEXT、TEXT、MEDIUMTEXT和LONGTEXT 2. blob被视为二进制字符串,Text被视为非二进制字符串; blob列没有字符集，并且排序和比较基于列值字节的数值值。 TEXT列有一个字符集，并且根据字符集的校对规则对值进行排序和比较。 在MySQL TEXT或BLOB列的存储或检索过程中，不存在大小写转换,当未运行在严格模式时，如果你为BLOB或TEXT列分配一个超过该列类型的最大长度的值值，值被截取以保证适合。如果截掉的字符不是空格，将会产生一条警告。 使用严格SQL模式，会产生错误，并且值将被拒绝而不是截取并给出警告.在大多数方面，可以将BLOB列视为能够足够大的VARBINARY列。同样，可以将TEXT列视为VARCHAR列。 3.

将图片存储到数据库中（Blob） public void BlogIn(){ Connection con=getConnection(); System.out.println(con); //插入数据库的语句 String sql="insert into user(name,message) values(?,?)"; try { PreparedStatement pstmt= con.prepareStatement(sql); pstmt.setString(1, "ligen"); //读取图片等二进制的文件,使用InputStream输入流 InputStream in=new FileInputStream("G:\\111.jpg"); /* mysql实现了所有方法，但有些方法执行无法通过，没有真正的实现 pstmt.setBlob(2, in); pstmt.setBinaryStream(2, in); */ pstmt.setBinaryStream(2, in, in.available()); pstmt.executeUpdate(); con.close(); } catch (SQLException e) { // TODO Auto-generated catch block 2.将图片从数据库中读出来（Blob） public void

I was wondering if it was possible to stream data from javascript to the browser's downloads manager . Using webrtc, I stream data (from files > 1Gb) from a browser to the other. On the receiver side, I store into memory all this data (as arraybuffer ... so the data is essentially still chunks), and I would like the user to be able to download it. Problem : Blob objects have a maximum size of about 600 Mb (depending on the browser) so I can't re-create the file from the chunks. Is there a way to stream these chunks so that the browser downloads them directly ? Following @guest271314's advice,