jDiskMark v0.5 (Windows/Mac/Linux)

Cross platform disk benchmark utility written in java.

Features

• Java cross platform solution
• Benchmark IO read/write performance
• Intuitive graphs for: sample bw, max, min, cum avg, access time
• Adjustable block size, block qty and sample qty
• Single or multi file option
• Sequential or random option
• Detects drive model info
• Save and load benchmarks for review
• Auto clear disk cache (when sudo or admin)

Releases

https://sourceforge.net/projects/jdiskmark/

Installation

1. Install java 21

2. Verify java 21 is installed:

   C:\Users\username>java --version
   java 21.0.1 2023-10-17 LTS
   Java(TM) SE Runtime Environment (build 21.0.1+12-LTS-29)
   Java HotSpot(TM) 64-Bit Server VM (build 21.0.1+12-LTS-29, mixed mode, sharing)
   

3. Extract release zip archive into desired location.

   Examples:  
   /Users/username/jdiskmark-v0.5  
   /opt/jdiskmark-v0.5
   

Launching as normal process

Note: Running without sudo or a windows administrator will require manually clearing the disk write cache before performing read benchmarks.

1. Open a terminal or shell in the extracted directory.

2. run command:

   $ java -jar jDiskMark.jar
   

   In windows double click executable jar file.

3. Drop cache manually:

• Linux: sudo sh -c "sync; 1 > /proc/sys/vm/drop_caches"
• Mac OS: sudo sh -c "sync; purge"
• Windows: Run included EmptyStandbyList.exe or RAMMap64.exe With RAMMap64 invalidate disk cache with Empty > Empty Standby List

Launching with elevated privileges

Note: Take advantage of automatic clearing of the disk cache for write read benchmarks start with sudo or an administrator windows shell.

• Linux: sudo java -jar jDiskMark.jar
• Mac OS: sudo java -jar jDiskMark.jar
• Windows: start powershell as administrator then java -jar jDiskMark

Development Environment

jdiskmark client is developed with NetBeans 20 and Java 21

Source

Source code is available on our github repo

Release Notes

v0.5 beta 3

• update for java 21 LTS w NetBeans 20 environment: eclipselink 4.0, jpa 3.1, modelgen 5.6, annotations 3.1, xml.bind 4.0
• increased drive information default col width to 170
• time format updated to yyyy-MM-dd HH:mm:ss
• default to 200 marks
• replace Date w LocalDateTime to avoid deprecated @Temporal
• disk access time (ms) - plotting disabled by default
• replace display of transfer size with access time in run panel
• auto clear disk cache for combined write read benchmarks
• save and load benchmarks and graph series

v0.4

• updated eclipselink to 2.6 allows auto schema update
• improved gui initialization
• platform disk model info:
  • windows: via powershell query
  • linux: via df /data/path & lsblk /dev/path --output MODEL
  • osx: via df /data/path & diskutil info /dev/disk1

v0.3

• persist recent run with embedded derby db
• remove "transfer mark number" from graph
• changed graph background to dark gray
• resizing main frame stretches tabbed pane instead of empty panel

v0.2

• auto generate zip release ie. jdiskmark-v0.2.zip
• added tabbed pane near bottom to organize new controls
• format excessive decimal places
• show recent runs (not persisted)
• default to nimbus look and feel

v0.1

• initial release

Proposed Features

• store benchmark data for each run and load when selected
• upload benchmarks to jdiskmark.net portal (anonymous/w login)
• local app log for remote diagnostics
• detect and display os processor info
• selecting a drive location displays detected drive information below
• disk capacity and drive letter (available on windows)
• speed curves w rw at different tx sizes
• response time histogram > distribution of IO
• IOPS charts, review potential charts