SOLVED how to resize slog ssd

[Caffe Mocha]

2 Questions

1. I tried to use this command gpart add -t freebsd-zfs -l slog -s 2G -b 1M ada0 from the link below
https://forums.freenas.org/index.php?threads/how-to-add-an-slog.16766/
but it says invalid argument , I double checked my ssd is ada0 by using volume manager and demesg.
could someone please tell me what i did wrong?

2. I also tried to use volume manager to set up ZIL, so do I volume extend to the pool or I can just leave it blank?

 

[depasseg]

I've found it easier to use camcontrol to add a Host Protected Area of the SSD. This effectively reduces the size of the SSD and then you can add the device as a Log via the UI.

Code:

camcontrol hpa     #to view current HPA settings
camcontrol security ada0 -e #enables editing of protected settings
camcontrol hpa ada0 -s  31250000  -P  # x 512B sectors =  16G

 

[Caffe Mocha]

I've found it easier to use camcontrol to add a Host Protected Area of the SSD. This effectively reduces the size of the SSD and then you can add the device as a Log via the UI.

Code:

camcontrol hpa     #to view current HPA settings
camcontrol security ada0 -e #enables editing of protected settings
camcontrol hpa ada0 -s  31250000  -P  # x 512B sectors =  16G

Thank you very much for replying , and a Merry Chrismase to you
I have solved the problem with gpart commands , but the remaining question is
what amount of slog is the right size. I don't really need it to be too fine grained
For now I set it at 4G , I wonder if I set that correctly?
Specs are 32 G of ram , 3tb X6 in raidz2
800g Intel 3700 (got it real cheap. )
Using 2 nics for back up.
I have read about 1/8 of ram size and 2 transition group . Or .625 per connection for 5 secs. (Don't really remember the specific number of)
Is more better ? Will there be performance impact if I set slog too small or big?

 

[depasseg]

Thank you very much for replying , and a Merry Chrismase to you
I have solved the problem with gpart commands , but the remaining question is
what amount of slog is the right size. I don't really need it to be too fine grained
For now I set it at 4G , I wonder if I set that correctly?
Specs are 32 G of ram , 3tb X6 in raidz2
800g Intel 3700 (got it real cheap. )
Using 2 nics for back up.
I have read about 1/8 of ram size and 2 transition group . Or .625 per connection for 5 secs. (Don't really remember the specific number of)
Is more better ? Will there be performance impact if I set slog too small or big?

There will be a performance impact of it is set too small, but not if it's too big.

I'd suggest seeing it to 16 and then you wouldn't have to worry about it.