9.0 install and journaling

Da Rock freebsd-questions at herveybayaustralia.com.au
Sat Dec 10 22:12:43 UTC 2011

On 12/11/11 08:02, Manolis Kiagias wrote:
> On 10/12/2011 11:41 μμ, Da Rock wrote:
>> On 12/11/11 02:09, Manolis Kiagias wrote:
>>> On 10/12/2011 5:19 μμ, Warren Block wrote:
>>>> On Sat, 10 Dec 2011, R Skinner wrote:
>>>>> So I went to the handbook. I'm still a little confused though: can 
>>>>> one still setup the usr and var (and so forth)? It said you 
>>>>> possibly could, but it escaped me as to how.
>>>> Use the bsdinstall partition editor to manually create the 
>>>> partitions. I documented how to create an old-fashioned MBR layout 
>>>> with bsdinstall on the forums a while back:
>>>> http://forums.freebsd.org/showpost.php?p=149210&postcount=13
>>>> The process would be similar for GPT, which is really the way to go 
>>>> now.
>>> As Warren says, you can still create /usr and /var and all the other 
>>> "legacy" partitions if you so wish - and you may even use the full 
>>> journaling (gjournal) on them.
>>> But the default for bsdinstall is to use gpart, install everything 
>>> on a big / and create UFS2 partitions with the new soft-updates 
>>> journaling system (on by default). Compared to gjournal, 
>>> soft-updates journaling only journals metadata and not everything 
>>> like gjournal does. This will definitely make it faster although 
>>> probably less "safe" than gjournal. It should be good for most 
>>> purposes though and needs no additional steps after install (unlike 
>>> gjournal). Since it's the default, the decision to go for one big / 
>>> seems ok after all. I believe this is more or less what Linux is 
>>> doing with Ext3/Ext4 filesystems (metadata journaling).
>> GPT is cool - no problems there. The main thing I want to know is if 
>> I need to run fsck every time the system dies unexpectedly (which is 
>> a higher occurrence on a laptop)? GJournal helps in that it takes 
>> care of that. The growing size of drives is another concern given the 
>> time it takes to check a 500G disk (my smallest atm), although this 
>> is way down on the list for the moment.
> It does the fsck automatically and it seems to be  fast. As with other 
> metadata journaled filesystems you will probably have to do a full 
> check occasionally. Can't you give you any times atm, I need to dump 
> /repartition/restore some of my systems to use su+j. Only tested on 
> virtual machines.
I'll have to try it out then; give it a chance.
>> As for one big / partition- linux may be using it: and its their 
>> biggest failing! I've had a system lockup due to lack of space. Never 
>> a problem with bsd as logs will only fill up var, a user won't break 
>> it with filling up usr, etc. And root always stays protected! Its 
>> saved my life a number of times... I can quickly fill TB's of data in 
>> no time, and if something goes bang the logs can be a silent killer 
>> too. My 2c's anyway...
> I am used to the separate partitions too, although I realize a single 
> big / would be suitable for more than a few systems. It's nice we have 
> a choice here.
True. But as a new user it was the separate partitions that attracted 
me, having been burned with linux's megaroot. And a new user would have 
trouble setting up the partitions. Not to mention the break with 
tradition (what is happening to this world)! :)

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