User guide

SN0430935-00 Rev. D 04/14 4
White Paper
QLogic 10000 Series Adapter Provides
Application Benets Through I/O Caching
Figure 4: Four Server Database Query TPS
LOCAL CACHE VERSUS REMOTE CACHE EFFICIENCY OF QLOGIC 10000
SERIES ADAPTER REMOTE ACCESS
Figure5 identies the conguration testing the latency difference of local
versus remote cache (where a LUN cache is located in a 10000 Series
Adapter residing on another server). Test conclusions showed a nine
percent performance impact of slightly increased latency between local
versus remote database queries.
Figure 5: Local Versus Remote Test Conguration
As shown in Figure6, the performance benchmark measured 0percent
cache against 30percent local caching, and the test repeated with the
operation of caching at 30percent in the remote conguration. No
signicant difference was perceived between local cache access and
remote cache access.
Figure 6: Local Versus Remote Cache Efciency
TEST HARDWARE AND SOFTWARE
Table1 lists the hardware and Table2 lists the software used for database
workload queries.
Table 1. Hardware Used for Exchange Query
Hardware Description
Host Server
Dual 6-core Intel Xeon CPU
E5-2640 at 2.50GHz, 24logical
processors, 32GB RAM
Host Bus Adapter
QLogic FabricCache 10000 Series
8Gb Fibre Channel Adapter
Quantity of Host Bus Adapters
per Host
1
Fabric Switch
QLogic 5800V/5802V 8Gbps Fibre
Channel Switch
Storage Array HP EVA 6300
Drive Speed 10K
Quantity of Drives on Array 24
LUN Size 100GB × 7
RAID Type RAID 5