I/O Trace Data Files
The following traces are free to download under the terms of the SNIA Trace Data Files Download License. Please note that cookies must be enabled within your browser in order to download traces.
We also have a spreadsheet containing information on some currently known traces.
The I/O Trace Data files have been segregated into several broad categories. These categories are typically, although not exclusively, defined by the measurement point at which the respective I/O trace was taken.
The categories (or types) of I/O traces include:
Application Traces [This category is currently empty]
Application Traces record calls made by a specific application.
Block I/O Traces
Block I/O Traces typically include block level (e.g., at the logical volume manager, disk driver, etc. level) and block protocol (e.g., SCSI, ATA, Fibre Channel) traces.
Network File System Traces are typically those for NFS and CIFS and which reflect the protocol used by such network file systems.
Parallel Traces [This category is currently empty]
Parallel traces, generally taken from supercomputers, record the system calls made by multiple computers running in parallel.
SSSI WIOCP Metrics
SSSI WIOCP, the SNIA Solid State Storage Initiative (SSSI) Workload I/O Capture Program (WIOCP), collects already-summarized empirical metrics separately for both monitored devices and processes/applications. More information about the SSSI WIOCP can be found in the SSSI WIOCP FAQ and the 'Introduction to the SSSI WIOCP I/O Metrics' whitepaper. In addition, the Participating in the SSSI WIOCP is Easy document provides simple, illustrated step-by-step instructions for downloading and installing the WIOCP software.
Also for a limited time, you can receive a $10 Amazon gift card for participating in the SSSI WIOCP and be eligible to win an Intel SSD. Details of the 'SSSI WIOCP Incentive Program' are available at the SSSI WIOCP web page.
Static Snapshots [This category is currently empty]
Static Snapshots are traces taken statically of a file system rather than of system calls.
System Call Traces
System Call I/O Traces typically reflect operating system calls to the file system.