17 messages in org.freebsd.freebsd-fs24 TB UFS2 reality check ?| From | Sent On | Attachments |
|---|---|---|
| Juri Mianovich | Jul 8, 2008 7:56 pm | |
| Julian Elischer | Jul 8, 2008 8:01 pm | |
| Juri Mianovich | Jul 8, 2008 8:59 pm | |
| Julian Elischer | Jul 8, 2008 9:12 pm | |
| Bakul Shah | Jul 8, 2008 9:26 pm | |
| Bakul Shah | Jul 8, 2008 9:31 pm | |
| Julian Elischer | Jul 8, 2008 9:44 pm | |
| Juri Mianovich | Jul 8, 2008 9:44 pm | |
| Jeff Mohler | Jul 8, 2008 10:03 pm | |
| Jeff Mohler | Jul 9, 2008 2:25 am | |
| Juri Mianovich | Jul 9, 2008 2:27 am | |
| Juri Mianovich | Jul 9, 2008 7:41 pm | |
| Jeff Mohler | Jul 10, 2008 1:02 am | |
| Alexandre Biancalana | Jul 10, 2008 1:28 am | |
| Juri Mianovich | Jul 10, 2008 4:12 pm | |
| Gary Palmer | Jul 10, 2008 5:25 pm | |
| Jeff Mohler | Jul 10, 2008 5:38 pm |
| Subject: | 24 TB UFS2 reality check ? | |
|---|---|---|
| From: | Juri Mianovich (juri...@yahoo.com) | |
| Date: | Jul 8, 2008 8:59:19 pm | |
| List: | org.freebsd.freebsd-fs | |
--- On Tue, 7/8/08, Julian Elischer <jul...@elischer.org> wrote:
You had better have a lot of memory available ot your processes to be able to fsck this baby.. (it'd better be an amd64).. I don't remember the exact numbers but for 16k blocksize, it was something like 200MB ram for each 100GB of filesystem when populated with 60KB files.. (don't trust those numbers, do some testing (and let us know :-) )
Thank you very much.
I currently have a similar system with:
/dev/da1 8.0T 1.3T 6.1T 16% /users
which was created with 'newfs -i 32768 -U /dev/da1' ... and I can successfully
fsck it with my:
kern.maxdsiz="2572000000"
setting.
So perhaps a filesystem 3x that size should be '-i 131072' to maintain the same
ability to fsck ?
None of these systems are 64-bit - they are all running i386 w/4 GB of ram.
If I stuck with '-i 65536' (instead of going all the way to 131072) and things
got sticky, I could always temporarily reboot with a maxdsiz closer to 3 GB,
right ?