It works fine if do really small block writes like this:
# dd if=/dev/zero of=/dev/bcache0 bs=100 count=5000000
Can anybody tell me why?
Stefan
Am 23.07.2013 21:41, schrieb Stefan Priebe:
It's 3.10 with bcache Updates from kent's for 3.10 branch.
Stefan
This mail was sent with my iPhone.
Am 23.07.2013 um 18:00 schrieb Jack Wang <jack.wang.usish@xxxxxxxxx
<mailto:jack.wang.usish@xxxxxxxxx>>:
Hi Stefan,
Strange, I tested bcache 2 month ago, mostly bcache-3.2 branch in
writeback mode, it works as claimed.
which kernel version are you using?
Jack
2013/7/23 Stefan Priebe - Profihost AG <s.priebe@xxxxxxxxxxxx
<mailto:s.priebe@xxxxxxxxxxxx>>
Hi,
maybe i missed something or maybe i'm just wrong.
# cat /sys/block/bcache2/bcache/sequential_cutoff
512k
# cat /sys/block/bcache2/bcache/stats_five_minute/bypassed
64.3M
# dd if=/dev/zero of=/mnt/bcache2/ttt bs=4M count=1000 oflag=direct
1000+0 records in
1000+0 records out
4194304000 bytes (4,2 GB) copied, 11,0348 s, 380 MB/s
# cat /sys/block/bcache2/bcache/stats_five_minute/bypassed
69.3M
I also see only IOP/s an writes go to the SSD but not to the disk
behind. What's wrong?
Greets,
Stefan
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