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Hi Kent, I have tested bcache on my platform, but the result is not good. I think maybe the wrong config caused it. Would you pls help me to check the config, or give me some advice for bcache
performance testing? My SSD card is a PCIe SSD card (about 120,000 IOPS), and I used 10GB. I have download the code from git://evilpiepirate.org/~kent/linux-bcache.git. The commands creating bcache is below: make-bcache –B /dev/sdb8 make-bcache –C –w4k –b1M –writeback /dev/hioa5
I use FIO to test the seq./random IO performance, and the result is below: write read randwrite randread bcache 10809 KB/s 164502.5 KB/s 2713 KB/s 29640 KB/s cache_hit_rate 80 79 94 92 And the basic test result is: Write read randwrite randread HDD 81211.6 KB/s 172242 KB/s 2606 KB/s 1855 KB/s SSD 250948.2 KB/s 813855 KB/s 238892.7 KB/s 657319.5 KB/s |
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