Difference between revisions of "SYA810 RAID Benchmarking Lab"
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Revision as of 02:52, 11 February 2009
Contents
Task
The machine 'scotland' is equipped with six 1.5TB disk drives. Partition 9 on each drive is unused. We're going to use these partitions to benchmark various RAID levels.
- Create a RAID array of the six partitions (/dev/sd[a-f]9) using the appropriate mdadm command(s).
- Create an ext3 filesystem on that array.
- Benchmark the array using the Winter_2009_SYA810_Block_Device_Benchmark_Scripts. Repeat the benchmarks at least 3 times -- more if the results seem to vary substantially.
- Stop the RAID array.
Important Notes
- Do not use any devices other than /dev/sd[a-f]9 as members of the array.
- Do not have any spare elements in your array.
- Make sure the system is quiet (not doing any background processing) when you run your tests.
Who's Doing Which RAID Level
Write you name on here according to RAID levels chosen in class.
| RAID Level | Person |
|---|---|
| Append | |
| 0 | Milton Paiva Neto Script |
| 1 | |
| 4 | |
| 5 | |
| 6 | Nestor Scripts |
| 1+0 | Kezhong Liang |
| RAID 5+LVM |
Scheduling
| Person | Date/time (YYYY-MM-DD HH:MM-HH:MM) | Tests |
|---|---|---|
| Chris Tyler | 2009-02-02 08:00-17:00 | Multiseat testing |
| Chris Tyler | 2009-02-04 08:00-17:00 | Multiseat testing |
| Nestor Chan | 2009-02-06 ??:00- 2009-02-06 ??:00 | Raid 5 with multi-size writing test
(change my time if u need a slot..) |
| Milton Paiva | 2009-02-09 14:30-17:10 | Raid 0 |
| Kezhong Liang | 2009-02-10 23:30 - ?? | RAID - 1+0 |
| Mohak Vyas | 2009-02-11 16:00 - ?? | RAID - 4 |
Results
Record your results here. A table would be nice!
- Author: Milton Paiva
- Raid Type: RAID0
- Files: 10
- Size: 10 GB
Scripts
#!/bin/bash
#
# Script first written by Nestor Chan - Bossanesta and modified by Milton Paiva Neto <milton.paiva@gmail.com>
# Create 10 files with with 10 GBs fully of zeros
time -p (for ((x=1; x<=10; x++))
do
dd if=/dev/zero of=fakefile$x bs=1G count=10;
done
sync
)
# this suppose to call all small script one by one, and to be run with nohup. # bug: it calls each script in background.. echo "Start Testing" free date echo "===================================" /home/bossanesta/test-10kb free date /home/bossanesta/test-1mb free date /home/bossanesta/test-100mb free date echo "Finish Testing"
[root@scotland raid0]# sh +x speedtest.sh
TEST1
10+0 records in 10+0 records out 10737418240 bytes (11 GB) copied, 44.497 s, 241 MB/s 10+0 records in 10+0 records out 10737418240 bytes (11 GB) copied, 42.6988 s, 251 MB/s 10+0 records in 10+0 records out 10737418240 bytes (11 GB) copied, 45.4546 s, 236 MB/s 10+0 records in 10+0 records out 10737418240 bytes (11 GB) copied, 43.6104 s, 246 MB/s 10+0 records in 10+0 records out 10737418240 bytes (11 GB) copied, 45.3155 s, 237 MB/s 10+0 records in 10+0 records out 10737418240 bytes (11 GB) copied, 44.858 s, 239 MB/s 10+0 records in 10+0 records out 10737418240 bytes (11 GB) copied, 46.2515 s, 232 MB/s 10+0 records in 10+0 records out 10737418240 bytes (11 GB) copied, 47.0685 s, 228 MB/s 10+0 records in 10+0 records out 10737418240 bytes (11 GB) copied, 43.8201 s, 245 MB/s 10+0 records in 10+0 records out 10737418240 bytes (11 GB) copied, 44.8941 s, 239 MB/s
TEST2
10+0 records in 10+0 records out 10737418240 bytes (11 GB) copied, 41.8107 s, 257 MB/s 10+0 records in 10+0 records out 10737418240 bytes (11 GB) copied, 45.8173 s, 234 MB/s 10+0 records in 10+0 records out 10737418240 bytes (11 GB) copied, 45.3462 s, 237 MB/s 10+0 records in 10+0 records out 10737418240 bytes (11 GB) copied, 45.1653 s, 238 MB/s 10+0 records in 10+0 records out 10737418240 bytes (11 GB) copied, 46.6794 s, 230 MB/s 10+0 records in 10+0 records out 10737418240 bytes (11 GB) copied, 44.382 s, 242 MB/s 10+0 records in 10+0 records out 10737418240 bytes (11 GB) copied, 44.6695 s, 240 MB/s 10+0 records in 10+0 records out 10737418240 bytes (11 GB) copied, 44.7078 s, 240 MB/s 10+0 records in 10+0 records out 10737418240 bytes (11 GB) copied, 43.8667 s, 245 MB/s 10+0 records in 10+0 records out 10737418240 bytes (11 GB) copied, 46.4641 s, 231 MB/s real 460.54 user 0.00 sys 323.48
Final Results
- Create files
real 455.94 user 0.00 sys 324.02
- Delete files
real 2m40.236s user 0m0.000s sys 0m7.715s
Kezhong Liang
- Raid Type: RAID 1+0
- My Script
| The First Time | The Second Time | The Third Time |
|---|---|---|
| Read Rate: 146 MB/sec | Read Rate: 113 MB/sec | Read Rate: 113 MB/sec |
| Write Rate: 85 MB/sec | Write Rate: 102 MB/sec | Write Rate: 93 MB/sec |
- Milton's Script
| The First Time | The Second Time | The Third Time |
|---|---|---|
| 83.9532 s, 128 MB/s | 1 | 1 |
| 84.3996 s, 127 MB/s | 2 | 2 |
| 3 | 3 | 3 |
| 4 | 4 | 4 |
| 5 | 5 | 5 |
| 6 | 6 | 6 |
| 7 | 7 | 7 |
| 8 | 8 | 8 |
| 9 | 9 | 9 |
| 10 | 10 | 10 |
