Open Source Object Storage for Unstructured Data: Ceph on HP ProLiant SL4540 Gen8 Servers

Reference Architecture| Ceph on HP ProLiant SL4540 Gen8 Servers
Latency
Average latency at these test loads is mostly sub-10ms (with the exception of sequential writes at 15ms). The top two most
common latency categories in the sampling ranged from 2/3 to almost 95% of the entire latency samples, so the
performance is fairly stable as well. Maximum latency ranged from about 1 second for sequential writes up to almost three
seconds for random writes—long but tolerable for block storage error handling.
3.67
0.35
0.30
1.00
0.35
1.00
0.00
1.00
2.00
3.00
4.00
Test Type
ms
Minimum Latency
256K sequential writes
256K sequential reads
8K random reads
8K random writes
8K mix test reads
1131.3
1460.2
1399.3
2928.7
1683.0
1647.3
0.0
1000.0
2000.0
3000.0
4000.0
Test Type
ms
Maximum Latency
256K sequential writes
256K sequential reads
8K random reads
8K random writes
8K mix test reads
15.09
7.40
2.74
8.03
2.83
6.42
0.00
5.00
10.00
15.00
20.00
Test Type
ms
Average Latency
256K sequential writes
256K sequential reads
8K random reads
8K random writes
8K mix test reads
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