Hi All,
Recently, I meet a strange quetion. I have done seq write
(blocksize=1m) into mount folders.
If total bytes is small, the avg write rate is 370MBs (little files :
4MB * 256 * 60 )
If total bytes is big, the avg write rate is 180MBs (a lot of files :
4MB * 256 * 600)
the raw ssd benchmark, seq write is 400MBs.
Can anybody help to explain it? argument is wrong, or something else.
Below argument list:
Hardware: Intel 3750 ssd 480GB (sata3)
centos: 7.3 x86_64
kernel: 3.10.0-514.el7.x86_64
software: mkfs.xfs
mount feature: /dev/sdb1 type xfs
(rw,noatime,attr2,inode64,logbsize=256k,noquota)
xfs_info /dev/sdl1 :
meta-data=/dev/sdl1 isize=512 agcount=4, agsize=28975477 blks
= sectsz=4096 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=115901905, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=56592, version=2
= sectsz=4096 sunit=1 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
Tks and Rgds
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