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.

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.
For questions about downloading using a shell script, see Using Shell Scripts, and for more information about downloading using a Windows batch script, see Using Batch Scripts.




Trace Name Details Details Related Tools Year Recorded Timespan Record Count File Size Actions
YCSB RocksDB SSD Traces collected and used in the paper SSD-Based Workload Characteristics and their Performance Implications by Gala Yadgar, Moshe Gabel, Shehbaz Jaffer and Bianca Schroeder, ACM Transactions on Storage '20 Traces from SSD-Based Workload Characteristics and their Performance Implications by Gala Yadgar et al., ACM TOS '20 2018 about 10 hours 2.07 Billion
Systor '17 Traces Traces related to the paper Understanding storage traffic characteristics on enterprise virtual desktop infrastructure by Chunghan Lee, Tatsuo Kumano, Tatsuma Matsuki, Hiroshi Endo, Naoto Fukumoto, and Mariko Sugawara, Fujitsu Laboratories Ltd., appearing in Proceedings of the 10th ACM International Systems and Storage Conference (SYSTOR '17) Traces from Understanding storage traffic characteristics on enterprise virtual desktop infrastructure by Chunghan Lee et al., Fujitsu Laboratories Ltd., (SYSTOR '17) 2016 about 1 month 4.19 Billion
Slacker Traces These traces were collected in 2016 by running blktrace on the HelloBench benchmark. These outputs are related to the paper Slacker: Fast Distribution with Lazy Docker Containers published in FAST 2016. These are block traces related to the paper Slacker: Fast Distribution with Lazy Docker Containers published in FAST 2016. 2015 14 minutes 286 Thousand
Nexus 5 Smartphone Traces This is a collection of 25 traces consisting of 18 traces of singular smartphone applications and 7 traces of two smartphone applications running concurrently. All of these traces were run on a Nexus 5 smartphone. The study for which these traces were collected can be found in the paper "I/O Characteristics of Smartphone Applications and Their Implications for eMMC Design". This is a collection of 25 traces of a Nexus 5 smartphone. The study for which these traces were collected can be found in the paper "I/O Characteristics of Smartphone Applications and Their Implications for eMMC Design". This trace has no related tools yet. 2014 6 months 400 Thousand

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WARNING: These traces are over 10 years old! They should not be used for modern research!

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.
For questions about downloading using a shell script, see Using Shell Scripts, and for more information about downloading using a Windows batch script, see Using Batch Scripts.



Trace Name Details Details Actions
FIU Traces Traces collected at FIU. Traces collected at FIU. These traces can be decoded using blkparse. This utility is available on all standard Linux systems. 2008-2009 3 months 475 Million
Microsoft Production Server Traces Because of the size of the traces, the BuildServer traces have been repackaged by IOTTA into eight zip files. The first seven files are divided into one for each of the first seven timestamped hours in the original traces. The last file contains traces of the remaining 18 traced hours, in which the activity was much lighter. All eight zip files contain the same Readme.* and Disclaimer files. They are designed so that if all are unpacked in the same directory, the original trace collection will be recreated. Traces of several production servers at Microsoft, as described in the IEEE International Symposium on Workload Characterization, 2008. 2007-2008 4 months 1 Billion
Microsoft Enterprise Traces Traces collected at Microsoft using the event tracing for Windows framework. Traces collected at Microsoft using the event tracing for Windows framework. 2007-2008 4 months 2.6 Billion
MSR Cambridge Traces 1-week block I/O traces of enterprise servers at Microsoft Research Cambridge. The citation for the MSRC traces can be found here. 1-week block I/O traces of enterprise servers at Microsoft 2007 8 days 434 Million
SPC OLTP Application Traces Two I/O traces from OLTP applications running at two large financial institutions. Due to access restrictions, these traces are hosted externaly. Two I/O traces from OLTP applications running at two large financial institutions. 1999 1 day
SPC Search Engine Traces Three I/O traces from a popular search engine. Due to access restrictions, these traces are hosted externally. Three I/O traces from a popular search engine. 1999 1 day
Cello 1999 Disk traces taken from the cello server at HP labs in January through December of 1999. 1999 traces of Cello server at HP labs.

Software to process the SRT trace format can be downloaded from the tools section of this website.

1999-2000 12 months
Cello 1996 Disk traces take from the cello server at HP labs in September through November of 1996. 1996 traces of Cello server at HP labs

Software to process the SRT trace format can be downloaded from the tools section of this website.

1996 3 months
Cello 1992 Disk traces taken from the cello server at HP labs in April through June of 1992. 1992 traces of Cello server at HP labs

Software to process the SRT trace format can be downloaded from the tools section of this website.

1992 2 months
HP LAJW OS version: HP-UX A.08.00 U Machine type: 9000/845
Data from the paper "UNIX disk access patterns" by Chris Ruemmler and John Wilkes

Software to process the SRT trace format can be downloaded from the tools section of this website.

1992 2 months
Cello 1991 Disk traces taken from the cello server at HP labs in March through June of 1991. 1991 traces of Cello server at HP labs

Software to process the SRT trace format can be downloaded from the tools section of this website.

1991 3 months
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