Xdumpgozip Top

The developers recently announced version 3.0, which will include:

For instance, a simple Go program to zip a file (related to gozip concept) could look like this:

package main
import (
    "archive/zip"
    "fmt"
    "io"
    "log"
    "os"
    "path/filepath"
)
func main() 
    // File to zip
    filePath := "path/to/your/file.txt"
    // Zip file name
    zipFileName := "output.zip"
// Open a new zip file
    f, err := os.Create(zipFileName)
    if err != nil 
        log.Fatal(err)
defer f.Close()
// Create a new zip
    w := zip.NewWriter(f)
    defer w.Close()
// Add file to zip
    file, err := os.Open(filePath)
    if err != nil 
        log.Fatal(err)
defer file.Close()
// Prepare file in zip
    fzip := &zip.File
        Name:       filepath.Base(filePath),
        UncompressedSize: int64(file.Stat().Size()),
// Write file to zip
    writestream, err := fzip.CreateStream(w)
    if err != nil 
        log.Fatal(err)
_, err = io.Copy(writestream, file)
    if err != nil 
        log.Fatal(err)
fmt.Println("File zipped successfully.")

At its core, xdumpgozip is a command-line utility that scans a target file for zip file signatures (magic bytes) and extracts the contents. While standard tools like unzip require a valid zip file as the starting point, xdumpgozip is capable of finding zips inside other files.

This makes it particularly useful for:

Problem: Error: priority queue full (SIGBUS) Solution: Increase the queue size using --queue-limit=50000. You likely have millions of small files.

Problem: Compressed output is larger than input. Solution: Disable compression for already compressed files using --skip-compress-ext=.mp4,.jpg,.zip. The "top" algorithm will skip those.

Problem: xdumpgozip top is slow on NFS. Solution: Network drives hate random priority seeking. Use --strategy=linear to disable the priority reordering for network mounts. xdumpgozip top

The standard command structure is:

xdumpgozip [options] top [priority-level] [source] [destination]

Your first backup:

sudo xdumpgozip top high /home /backups/home_priority.dump.zst

This command does the following:

xdumpgozip -o ./output_dump memory_dump.bin

The tool will scan the input file, locate the offsets where Zip archives begin, and decompress the files to your current directory.

Given the speculative nature, usage would depend on actual implementation: The developers recently announced version 3

# Speculative usage example
xdumpgozip top > system_report.txt

This could potentially generate a report on the top processes or file system states and compress it.

xdumpgozip top -i 5 -c 12 -m cpu --rotate 10M

Captures top every 5s, 12 times, sorts by CPU, rotates after 10MB total archive size.