Thank you for your opinion of max_sectors_kb, Ulrich.
It provided me some inspiration for understanding the whole thing.
Thank you for your advice, Mike.
I will tune some parameters as you have mentioned below.
I will share if I could make achievements in performance tuning.
在 2018年9月21日星期五 UT
Thank you for your reply, Mike.
Now my iscsi disk performance can be around 300MB/s in 4M sequence
write(TCMU+LIO)
It increase from 20MB/s to 300MB/s, after I can change max_data_area_mb
from 8 to 256 && hw_max_sectors from 128 to 8192.
To my cluster, after a lot of tests I found that I should ke
Sorry ,the capture for targetcli seems can not display correctly.Paste it
again.
o- /
.
[...]
o- backstores
..
Hello Mike,
I am very appreciate for your instruction.
Now I can set hw_max_sectors through targcli when i create the device. I
set it to 8192 same as raw rbd device.
The performance improve a little, 4M seq write increase from 24MB/s to
40MB/s.(hw_max_sectors 64->8192, it is a /backstore/user:
Hello Mike,
I am very appreciate for your instruction.
Now I can set hw_max_sectors through targcli when i create the device. I
set it to 8192 same as raw rbd device.
The performance improve a little, 4M seq write increase from 24MB/s to
40MB/s.(hw_max_sectors 64->8192, it is a /backstore/user:
Hello Mike,
Thank you for your informative response.
在 2018年8月28日星期二 UTC+8上午8:49:46，Mike Christie写道：
>
> On 08/21/2018 08:52 PM, 3kbo...@gmail.com wrote:
> > Hi folks,
> >
> > I am newbie to open-iscsi.
> > My case is I export ceph rbd by open-iscsi.
> >
> > I found the max_sectors_kb is
Hi folks,
I am newbie to open-iscsi.
My case is I export ceph rbd by open-iscsi.
I found the max_sectors_kb is 64, the value is so small, and 4M sequence
write is only about 10MB/s.
I can not increase max_sectors_kb, if I do it will return "bash: echo:
write error: Invalid argument"(But I can c
