Storage System Performance Specifications
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The following are graphs which illustrate IOPS under various conditions for Unified Communications applications. This area is under construction. Check back frequently for updates.
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Unified Communications Manager
This section provides the IOPS data for a Cisco Unified Communications Manager system under load.
 | Note: | Sending CDR/CMR to the billing server does not incur any IOPS spikes, but enabling CDR Analysis and Reporting (CAR) continuous loading results in around 300 IOPS average on the system. |
As a reference, the following steady state IOPS were observed for the loads (expressed in Busy Hour Call Attempts) indicated:
- 10K BHCA produces ~ 35 IOPS
- 25K BHCA produces ~ 50 IOPS
- 50K BHCA produces ~ 100 IOPS
- 100K BHCA produces ~ 150 IOPS
| Note: | The Unified Communications Manager data is based on ~93-98% sequential writes. |
- Software upgrades generate 800 to 1200 IOPS in addition to steady state IOPS.
- CAR-scheduled uploads is 250 IOPS.
- Trace collection is 100 IOPS.
- Nightly backup is 50 IOPS.
Cisco Unity Connection
Summary of IOPS for Unity Connection
| IOPS Type | 1vCPU | 2vCPU | 4vCPU | 7vCPU |
|---|---|---|---|---|
| Avg Total | 78.66 | 129.01 | 217.89 | 201.73 |
| Peak Total | 760.99 | 714.06 | 867.88 | 773.70 |
| Avg Read | 5.90 | 19.60 | 45.67 | 9.53 |
| Peak Read | 601.84 | 469.46 | 693.21 | 526.22 |
| Avg Write | 72.77 | 109.40 | 172.22 | 192.20 |
| Peak Write | 247.14 | 293.51 | 371.97 | 413.50 |
Contact Center
Contact Center Enterprise
The SAN must be able to handle the following Unified CCE application disk I/O characteristics.
| Unified CCE Component | IOPS | Disk Read KBytes / sec | Disk Write KBytes / sec | Operating Conditions | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Peak | Avg. | 95th Pct. | Peak | Avg. | 95th Pct. | Peak | Avg. | 95th Pct.
| ||
| Router | 20 | 8 | 10 | 520 | 30 | 180 | 400 | 60 | 150 | 8,000 agents; 60 cps; ECC: 5 scalars @ 35 bytes each; No reporting. |
| Logger | 1,000 | 600 | 700 | 4,000 | 600 | 2,500 | 12,000 | 3,000 | 7,000 | |
| HDS | 1,600 | 1,000 | 1,100 | 600 | 70 | 400 | 6,000 | 2,000 | 3,800 | |
| Agent PG | 125 | 40 | 70 | 300 | 5 | 20 | 2,000 | 1,200 | 1,500 | 2,000 agents, 15 cps
|
| HDS | 3,900 | 2,500 | 3,800 | 75,000 | 30,000 | 50,000 | 9,500 | 2,200 | 5,800 | 8,000 agents; 60 cps; 200 reporting users at max query load; ECC: 5 scalars @ 35 bytes each. |
| ROGGER | 610 | 360 | 425 | 2,700 | 400 | 1,600 | 7,500 | 2,150 | 4,300 | 4,000 agents; 30 cps; ECC: 5 scalars @ 35 bytes each |
Contact Center Express/IPIVR IOPS
The following table lists the IOPS numbers for Unified Contact Center Express/IPIVR.
| IOPS Type | 2vCPU |
|---|---|
| IOPS Avg per VM | 150 |
| IOPS Max spike per VM | 1500 |
| Back to: Unified Communications in a Virtualized Environment |
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