gjournal +UFS - anyone actually use it?

[Mark Saad]

On Mar 5, 2013, at 1:35 PM, Wojciech Puchar <wojtek at wojtek.tensor.gdynia.pl> wrote:

> if yes - how about performance on production server.

I have used gjournal on 7.x amd64 . Using in disk journals . This was on a hp dl380 g5 using 6 300gb  sas disks in a raid 1+0 . 

I was using it to store large MySQL myisam tables , speed was acceptable at the time .  I never had any fs corruption and it worked as expected . 

At the time I set it up I remember there was some chatter about how slow gjournal was compared to ufs with softupdate . 

Fast forward to today I almost always use ufs with softupdate journal , new in FreeBSD 9.0 and available as a patch to 6.x, 7.x , and 8.x 

This is better supported now , as more people use it in new 9.x builds  .

> i think about journal on SSD.

I believe this is only and option in geom journal , I am not sure if you can relocate a suj journal to an alternate disk . It should be faster . All I can say here is give it a try and see what happens . 

Hope that helps 

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---
Mark saad | mark.saad at longcount.org