All these test are run by IOZONE, and the max file size are set about twice of the RAM size of each server.

IOZONE parameters:

-a run a automatic model
-R generate excel output file
-b output in excel worksheet file
-c Include close in the timing calculations
-g Set maximum file size (in Kbytes) for auto mode (or #m or #g)
-i o read model
-i 1 write model

The unit is MB(Mega Byte)

Average IO rate of each node:

in the below table, the row of RAM size indicate the RAM size of each machine(umfs01-umfs05).number in the table as "360+_40MB" means the average write rate for file size of 4G is 360MB, and for different record size,the write rate varies between (320MB,400MB)

• read and write

• write

• read

charts of IO rate for each node:

umfs01.aglt2.org

/opt/iozone/bin/iozone -Rab umfs01.io-912 -c -g 16G -i 0 -i 1

• write

the X coordinate represents the size of each tested file..On umfs01.the file sizes we tested includes ( 64 128 256 512 1024 2048 4096 8192 16384 32768 65536 131072 262144 524288 1048576 2097152 4194304 8388608 16777216 ) MB

the Y coordinate represents the IO rate of each file with each record size.Its Unit is MB.

each row of different color reprent using different record size to write or read..On umfs01,the record size we tested includes ( 4 8 16 32 64 128 256 512 1024 2048 4096 8192 16384 )MB

• read

umfs02.aglt2.org

/opt/iozone/bin/iozone -Rab umfs02.io-912 -c -g 32G -i 0 -i 1

• write

the X coordinate represents the size of each tested file..On umfs02.the file sizes we tested includes ( 64 128 256 512 1024 2048 4096 8192 16384 32768 65536 131072 262144 524288 1048576 2097152 4194304 8388608 16777216 33554432) MB

the Y coordinate represents the IO rate of each file with each record size.Its Unit is MB.

each row of different color reprent using different record size to write or read..On umfs02,the record size we tested includes ( 4 8 16 32 64 128 256 512 1024 2048 4096 8192 16384 )MB

• read

umfs03.aglt2.org

/usr/local/bin/iozone -Rab umfs03.io-912 -c -g 16G -i 0 -i 1

• write

the X coordinate represents the size of each tested file..On umfs03.the file sizes we tested includes ( 64 128 256 512 1024 2048 4096 8192 16384 32768 65536 131072 262144 524288 1048576 2097152 4194304 8388608 16777216 ) MB

the Y coordinate represents the IO rate of each file with each record size.Its Unit is MB.

each row of different color reprent using different record size to write or read..On umfs03,the record size we tested includes ( 4 8 16 32 64 128 256 512 1024 2048 4096 8192 16384 )MB

• read

umfs04.aglt2.org

/home/park/iozone-dir/iozone -Rab umfs04.io-912 -c -g 24G -i 0 -i 1

• write

the X coordinate represents the size of each tested file..On umfs04.the file sizes we tested includes ( 64 128 256 512 1024 2048 4096 8192 16384 32768 65536 131072 262144 524288 1048576 2097152 4194304 8388608 16777216 ) MB

the Y coordinate represents the IO rate of each file with each record size.Its Unit is MB.

each row of different color reprent using different record size to write or read..On umfs04,the record size we tested includes ( 4 8 16 32 64 128 256 512 1024 2048 4096 8192 16384 )MB

• read

umfs05.aglt2.org

/usr/local/bin/iozone -Rab umfs05.io-912 -c -g 16G -i 0 -i 1

• write

the X coordinate represents the size of each tested file..On umfs05.the file sizes we tested includes ( 64 128 256 512 1024 2048 4096 8192 16384 32768 65536 131072 262144 524288 1048576 2097152 4194304 8388608 16777216 ) MB

the Y coordinate represents the IO rate of each file with each record size.Its Unit is MB.

each row of different color reprent using different record size to write or read..On umfs05,the record size we tested includes ( 4 8 16 32 64 128 256 512 1024 2048 4096 8192 16384 )MB

• read

-- WenjingWu - 24 Sep 2007