Large latency with bcache for Ceph OSD(new mail thread)

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Sorry for creating a new mail thread(the origin is so long...)


I made a test again and get more infomation:

root@WXS0089:~# cat /sys/block/bcache0/bcache/dirty_data
0.0k
root@WXS0089:~# lsblk /dev/sda
NAME      MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda         8:0    0 447.1G  0 disk
`-bcache0 252:0    0  10.9T  0 disk
root@WXS0089:~# cat /sys/block/sda/bcache/priority_stats
Unused:         1%
Clean:          29%
Dirty:          70%
Metadata:       0%
Average:        49
Sectors per Q:  29184768
Quantiles:      [1 2 3 5 6 8 9 11 13 14 16 19 21 23 26 29 32 36 39 43 48 53 59 65 73 83 94 109 129 156 203]
root@WXS0089:~# cat /sys/fs/bcache/066319e1-8680-4b5b-adb8-49596319154b/internal/gc_after_writeback
1
You have new mail in /var/mail/root
root@WXS0089:~# cat /sys/fs/bcache/066319e1-8680-4b5b-adb8-49596319154b/cache_available_percent
28

I read the source codes and found if cache_available_percent > 50, it should wakeup gc while doing writeback, but it seemed not work right.





[Index of Archives]     [Linux RAID]     [Linux SCSI]     [Linux ATA RAID]     [IDE]     [Linux Wireless]     [Linux Kernel]     [ATH6KL]     [Linux Bluetooth]     [Linux Netdev]     [Kernel Newbies]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Device Mapper]

  Powered by Linux