gjournal+geli
I'm planning to use gjournal+geli on a 2TB drive in a USB enclosure. What I've read about this suggest that the order should be: geli-gjournal-ufs. I was wondering if it's possible to do it in the order gjournal-geli-ufs, which should be much more efficient. I've read that ufs should go directly on gjournal, but I just wanted to check that that is needed. I was also wondering about the journal size, and whether there are any performance optimizations to be made to mitigate the extra encryption/decryption in the journal. The man page suggests a size of at least 2xmemory which would be 2x1.5GB now, or maybe 2x16GB to allow for potential upgrades. It seems very large. The disk will hold fairly static data so it will be mostly be long sustained writes as files are copied in. Currently coping from geli to geli with soft-updates is slightly cpu limited. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: gjournal+geli
On Sat, Sep 11, 2010 at 9:25 AM, RW rwmailli...@googlemail.com wrote: I'm planning to use gjournal+geli on a 2TB drive in a USB enclosure. What I've read about this suggest that the order should be: geli-gjournal-ufs. I was wondering if it's possible to do it in the order gjournal-geli-ufs, which should be much more efficient. I've read that ufs should go directly on gjournal, but I just wanted to check that that is needed. I was also wondering about the journal size, and whether there are any performance optimizations to be made to mitigate the extra encryption/decryption in the journal. The man page suggests a size of at least 2xmemory which would be 2x1.5GB now, or maybe 2x16GB to allow for potential upgrades. It seems very large. The disk will hold fairly static data so it will be mostly be long sustained writes as files are copied in. Currently coping from geli to geli with soft-updates is slightly cpu limited. AFAIK, ufs must be on top of gjournal. Specific changes were made to allow ufs to be aware of the journal and I think sticking geli in-between would destroy that relationship. IME, gjournal is more sensitive to load as the man page also suggests. I have one production server with moderate load, and a 5 GB problem. I think something like 5 -10 GB journal would be more than enough for almost all loads, but that's just a guess. It's easy to test though, just run blogbench or some other io benchmark for a sustained period of time. If it doesn't panic, you're golden. -- Adam Vande More ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
[GJournal+Geli] Quick question before installation
Hi list I am new to all these features and I am about to install FreeBSD8.0 from a USB Drive. Before I take any further steps, I would like to ask whether is possible to perform an installation having an encrypted journaled UFS2 filesystem. As far as I know, I would say it is possible since gjournal and UFS2 operate on top of geli. Is this correct? Thanks in advance and have a nice day. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: [GJournal+Geli] Quick question before installation
On 02/26/10 14:40, Malibu Carl wrote: Hi list I am new to all these features and I am about to install FreeBSD8.0 from a USB Drive. Before I take any further steps, I would like to ask whether is possible to perform an installation having an encrypted journaled UFS2 filesystem. As far as I know, I would say it is possible since gjournal and UFS2 operate on top of geli. Is this correct? Yes, you would have this graph of GEOM classes: DISK - [possibly some partitions or slices] - GELI - GJOURNAL - UFS GJOURNAL and UFS need to be together, other classes are not position sensitive (within reason). ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
