VMWare Clariion Disk IO Tests Ubuntu/Redhat
ESX version 3.5 Update 3
Clariion CX4-480 RAID 5 of 300G 15K spindles (5 spindles per RAID Group)
4GB backplane and Fibre Channel throughout
On all servers:
Copied the 618MB iso image to /dev/shm (RAMdisk)
dd if=iso1 of=/dev/shm/iso1 bs=65536 oflag=sync
Ubuntu 8.0.4 2.6.24-23-server with Raw Mapped Luns and a 512 offset no LVM:
Write the iso image to SAN from RAMdisk with the oflag=sync to prevent IO buffering
dd if=iso1 of=/u01/iso1 bs=8388608 oflag=sync
Run 1: 106 MB/s
Run 2: 114 MB/s
Run 3: 116 MB/s
Run 4: 112 MB/s
Run 5: 94.5 MB/s
Ubuntu 8.0.4 2.6.24-23-server with Raw Mapped Luns and no offset no LVM:
dd if=iso1 of=/home/test1/iso1 bs=8388608 oflag=sync
Run 1: 110 MB/s
Run 2: 114 MB/s
Run 3: 111 MB/s
Run 4: 118 MB/s
Run 5: 116 MB/s
Ubuntu 8.0.4 2.6.24-23-server with vmdk and LVM:
dd if=iso1 of=/u01/iso1 bs=8388608 oflag=sync
Run 1: 56 MB/s
Run 2: 51 MB/s
Run 3: 105 MB/s
Run 4: 129 MB/s
Run 5: 116 MB/s
RHEL 5.2 2.6.18-128.1.1.el5 with vmdk and LVM:
dd if=iso1 of=/u01/iso1 bs=8388608 oflag=sync
Run 1: 49 MB/s
Run 2: 52 MB/s
Run 3: 105 MB/s
Run 4: 113 MB/s
Run 5: 114 MB/s
RHEL 4 Update 7 2.6.9-78.0.13.ELsmp with vmdk and LVM:
dd if=iso1 of=/u01/iso1 bs=8388608 oflag=sync
Run 1: 34 MB/s
Run 2: 32 MB/s
Run 3: 36 MB/s
Run 4: 34 MB/s
Run 5: 30 MB/s
Physical x3755 with 2 Qlogic 4GB HBA's boot-from-san performanceUbuntu 8.0.4 2.6.24-23-server with LVM and no offsetdd if=iso1 of=/u01/iso1 bs=8388608 oflag=syncRun 1: 152 MB/sRun 2: 150 MB/sRun 3: 134 MB/sRun 4: 144 MB/sRun 5: 162 MB/sRHEL 5.2 2.6.18-128.1.1.el5 with LVM and no offsetdd if=iso1 of=/u01/iso1 bs=8388608 oflag=syncRun 1: 100 MB/sRun 2: 91 MB/sRun 3: 82 MB/sRun 4: 92 MB/sRun 5: 91 MB/sRHEL 5.2 2.6.18-128.1.1.el5 local diskdd if=iso1 of=/u01/iso1 bs=8388608 oflag=syncRun 1: 55 MB/sRun 2: 54 MB/sRun 3: 55 MB/sRun 4: 56 MB/sRun 5: 56 MB/s
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