Red Hat NETWORK 3.6 - Installationsanleitung PDF herunterladen (Seite 12)

Technical white paper | HP RA for Red Hat Storage Server on HP ProLiant SL4540 Gen8 Server

Figure 8. Each node within the 2-node HP ProLiant SL4540 server was configured with two 18.2TB RAID 6 logical volumes.

Red Hat Storage Server client configuration

For testing, four HP servers were used as clients. Each client system ran Red Hat Enterprise Linux 6.4 and had the Red Hat

Storage Server client packages installed. Each client had two quad-core Intel Xeon E5-2407 processors, 96GB of Dual Rank

x4 PC3L-10600R CAS-9 Low-Voltage memory, and a dual-port 10Gb Ethernet adapter.

Performance and scalability testing with IOzone

IOzone was used to test the performance of the reference architecture Red Hat Storage Server cluster. As mentioned, four

Red Hat Storage Server nodes were configured, each was hosting a RAID6 based Red Hat Storage (RHS) brick and was

running glusterd. Five Red Hat Storage Server volumes were created, including:

• Three Distribute volumes (distvol2, distvol3, distvol4)

• One Replicate volume (mirrorvol2)

• One Distributed-Replicate volume (mirrorvol4)

IOzone was run on up to four Red Hat Storage Server native clients, for I/O performance and scalability testing. IOzone was

run in “Cluster testing” mode to launch eight IOzone tester threads on each client. With four clients, that capability resulted

in the ability to test with 8, 16, 24, or 32 threads concurrently performing I/O to the Red Hat Storage Server cluster.

The IOzone command line is as follows:

rhs-client1# iozone -+m ${IOZONE_CONFIG_FILENAME} -i ${IOZONE_TEST} -C -w -+n

-s ${IOZONE_FILESZ} -r ${IOZONE_RECORDSZ} -+z -c -e -t ${TEST_THREADS}

The following parameters were used in the IOzone command line:

• “-+m” specifies cluster testing mode

• IOZONE_CONFIG_ FILENAME is the IOzone config file for the cluster test format that lists the client hostnames and their

respective GlusterFS mounts (that we created when mounting Red Hat Storage Server volumes).

• The IOZONE_TEST parameter was varied to cover the “Sequential Read”, “Sequential Write”, and “Random Read/Write”

test cases.

• IOZONE_FILESZ was “8GB”. 8GB file transfers were used as a representative “workload” for the “Content Cloud” reference

architecture testing.

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Red Hat NETWORK 3.6 - Installationsanleitung Seite 12