I’m trying to unzip a very large .gz file in java around 50MB and then transferring it to hadoop file system. After unzipping, the file size becomes 20 GB. It takes more than 5 min to do this job. Even after using Buffered I/O streams, it is taking very long to decompress and transfer the file. Does Had…
Tag: compression
Decompressing/inflating zlib-compressed data without adler32 checksum
Update 2 (newest) Here’s the situation: A foreign application is storing zlib deflated (compressed) data in this format: 78 9C BC (…data…) 00 00 FF FF – let’s call it DATA1 If I take original XML file and deflate it in Java or Tcl, I get: 78 9C BD (…data…) D8 9F 29 BB…
How to save data from a “For Loop” into a compressed “.txt” file
I am trying to write a java code to save data from a “For Loop” (2d array named “arr”) into a compressed “.txt” file. What piece of code should be added to convert the result into Bytes and then use “ZipOutputStream” to write data into a compressed “.txt&#…
Compression is not working in spring but, it is showing Content-Encoding as gzip in the response headers
I am trying to compress the response from a java spring-boot application. I referred to some tutorials and StackOverflow questions and found that I just have to add these lines in the application.properties file, so I went ahead and added those, but after adding these lines, I am getting the Content-Encoding …
Java – How to handle special characters when compressing bytes (Huffman encoding)?
I am writing a Huffman Compression/Decompression program. I have started writing my compression method and I am stuck. I am trying to read all bytes in the file and then put all of the bytes into a byte array. After putting all bytes into the byte array I create an int[] array that will store all the frequenc…
File To Store Data in J2ME
I’m writing a J2ME dictionary app and I’m stuck on which is the best way to store the content in the app. I don’t want the app to be too big. I want to store the descriptions of the words in a dictionary. Please help me. I know about RMS but I don’t want to use RMS because all the
How to efficiently predict if data is compressible
I want to write a storage backend to store larger chunks of data. The data can be anything, but it is mainly binary files (images, pdfs, jar files) or text files (xml, jsp, js, html, java…). I found most of the data is already compressed. If everything is compressed, about 15% disk space can be saved. I…
java: save string as gzip file
I’m java beginner, I need something like this: String2GzipFile (String file_content, String file_name) String2GzipFile(“Lorem ipsum dolor sit amet, consectetur adipiscing elit.”, “lorem.txt.gz”) I …
How to I find out the size of a GZIP section embedded in firmware?
I am currently analyzing firmware images which contain many different sections, one of which is a GZIP section. I am able to know the location of the start of the GZIP section using magic number and the GZIPInputStream in Java. However, I need to know the compressed size of the gzip section. GZIPInputStream w…