Sheepdog?????????????洢???????????????洢???????????????á????????????????????????????????????????????????Σ?????汾????????????0.7.4??

???????
?????????6??
????????????7200?SATA???????WDC WD10EZEX-22RKKA0???????1TB???????????????????????????????????????????????SSD???????INTEL SSDSA2CW300G3???????300GB
???磺????????PCI-E?????????????bonding???и??????
???????ext4fs???????????rw??noatime??barrier=0??user_xattr??data=writeback
sheepdog???
??????6??????????100GB?????600GB
????????????3???????????????????200GB?????????滮??????
?????棺???SSD????????256GB??????????????????????????????????????ж??
????????
?????4GB??棬4?????CPU
???qemu 1.7????????KVM?????virtio
??????????
IOPS??????????С????????????д???????????????fio??sudo apt-get install fio???????????????150GB
??????????????????????????????д???????????????iozone??sudo apt-get install iozone3?????????????64MB??????????4GB???????????????????????????512MB?????????
??????????qemu??????????????????￡?
1??qemu-system-x86_64 --enable-kvm -m 4096 -smp 4 -drive ??????????????????????file=sheepdog:mint??if=virtio??index=0
2??-drive file=sheepdog:data??if=virtio??index=1 -net nic??model=virtio -net
3??user -vnc :1 -daemonize

IOPS????
???????
????SATA????IOPS

??????????7200?SATA??????????????????????10.5????????????????1???????????IOPS??????65??

 ????????????????IO??????￡????????????????65???????????????????????IO?????????????￡??????????IO?????IOPS?????80??100?????????ж?д???????????С??SATA?????С????С??洢???????Χ?????????????????????????IOPS?????磬?????????С??????С??1/8?????IOPS????90?????????????

????SSD????IOPS

???????SSD?????????????IO??????￡?IOPS???????9000???????????????????????????????????IO?????????????￡????????40000-50000??????????????????????????С?????????С?????????????IOPS??

?????д????

????????????????ж??????????д????????????????????д??????????????д??????????е??д?????趨?4:1???????????????????д????????????????д?????

?????????

?????????????????IO?????????noop??????????????????IOPS?????????Ч????????????????沢??а??????г?????

IOPS????1???????????棬???????
????????IO??????￡?????????????sheepdog??IOPS?????100????????SATA??????????????????е????????150GB?????????????????????450GB???????6??????????????75GB???????????????????????1TB???????1/13????????????IO?????????￡?IOPS??????????????????

??????????????????С??????1/8????19GB??IOPS?????130-140????????????????IO?????????￡?????????С??IOPS????????????

?????????????????150GB?????????????????10?????????????IO??????????10?????????????￡?IOPS???230-250??