| 1. Files | |
| This distribution contains the following files: | |
| a) README.txt: this file | |
| b) *.csv.gz: I/O trace files, described below | |
| c) MD5.txt: output of md5sum for csv.gz files | |
| 2. I/O trace files | |
| There are 2706 I/O traces from 6 different block storage devices (LUNs 0,1,2,3,4, and 6). | |
| More information about these is available from the SYSTOR '17 paper (see below). | |
| Each trace file is named as <date>_<lun index>.csv.gz. | |
| The date format consists of year(4 char.),month(2 char.),day(2 char.), and hour(2 char.). | |
| The LUN index corresponds to each block storage device. | |
| In the traces, the lun indexes are only 0,1,2,3,4, and 6. | |
| Here is an example file name. | |
| 2016022219-LUN4.csv.gz | |
| - year : 2016 | |
| - month : 02 (Feb.) | |
| - day : 22nd | |
| - hour : 7 PM | |
| - LUN index : 4 | |
| 3. I/O trace file format | |
| The files are gzipped csv (comma-separated text) files. The fields in | |
| the csv are: | |
| Timestamp,Response,IOType,LUN,Offset,Size | |
| - Timestamp is the time the I/O was issued. | |
| The timestamp is given as a Unix time (seconds since 1/1/1970) with a fractional part. | |
| Although the fractional part is nine digits, it is accurate only to the microsecond level; | |
| please ignore the nanosecond part. | |
| If you need to process the timestamps in their original local timezone, it is UTC+0900 (JST). | |
| For example: | |
| > head 2016022219-LUN4.csv.gz ← (Mon, 22 Feb 2016 19:00:00 JST) | |
| 1456135200.013118000 ← (Mon, 22 Feb 2016 10:00:00 GMT) | |
| - Response is the time needed to complete the I/O. | |
| - IOType is "Read(R)", "Write(W)", or ""(blank). | |
| The blank indicates that there was no response message. | |
| - LUN is the LUN index (0,1,2,3,4, or 5). | |
| - Offset is the starting offset of the I/O in bytes from the start of | |
| the logical disk. | |
| - Size is the transfer size of the I/O request in bytes. | |
| 4. Additional information | |
| When we cleaned up our traces, we found additional traces. | |
| We unfortunately detected some packet loss (below 0.1%) | |
| due to the way port-mirroring works. | |
| Finally, for a small number of transactions we could not find a mapping | |
| between OX_ID and RX_ID in a single binary dump file. | |
| As a result, they became the unknown transactions mentioned above. | |
| Here, we summarize the additional information: | |
| a) The additional measurements (Feb.16.2016 ~ Feb.21.2016) | |
| and extra hour (e.g. 7 AM) are included to this distribution. | |
| b) Due to the packet loss, some unknown transactions and | |
| irregular response times are included in the traces. | |
| Moreover, there was packet loss for a few seconds | |
| whenever the hour changed [e.g.) 9 AM -> 10 AM]. | |
| Please ignore those transactions. | |
| c) In order to fix the unknown transactions, | |
| we modified them using OX_ID and RX_ID with a series of dump files. | |
| Through the modification, we recovered a few more | |
| transactions in the entire traces. | |
| We also confirmed the CDF curves, and | |
| there was no impact on the statistics. | |
| 5. Contact address | |
| Please contact us via e-mail if you have any questions. | |
| E-mail : systor_dataset_2017(at)ml.labs.fujitsu.com | |
| 6. Attribution. | |
| Please cite the following publication as a reference in any published | |
| work using these traces. | |
| #Text | |
| ----- | |
| Understanding storage traffic characteristics on enterprise virtual desktop | |
| infrastructure | |
| Chunghan Lee, Tatsuo Kumano, Tatsuma Matsuki, Hiroshi Endo, Naoto Fukumoto, and | |
| Mariko Sugawara | |
| Fujitsu Laboratories Ltd. | |
| Proc. of the 10th ACM International Systems and Storage Conference (SYSTOR '17) | |
| https://dl.acm.org/citation.cfm?id=3078479 | |
| ----- | |
| #Bibtex | |
| ----- | |
| @inproceedings{Lee2017Understanding, | |
| author = {Lee, Chunghan and Kumano, Tatsuo and Matsuki, Tatsuma and Endo, Hiroshi | |
| and Fukumoto, Naoto and Sugawara, Mariko}, | |
| title = {Understanding Storage Traffic Characteristics on Enterprise Virtual Desktop | |
| Infrastructure}, | |
| booktitle = {Proceedings of the 10th ACM International Systems and Storage | |
| Conference}, | |
| series = {SYSTOR '17}, | |
| year = {2017}, | |
| isbn = {978-1-4503-5035-8}, | |
| location = {Haifa, Israel}, | |
| pages = {13:1--13:11}, | |
| articleno = {13}, | |
| numpages = {11}, | |
| publisher = {ACM}, | |
| address = {New York, NY, USA}, | |
| keywords = {measurement, performance analysis, virtual desktop infrastructure (VDI)}, | |
| } | |
| ----- | |