27 messages in org.freebsd.freebsd-geomJournaling UFS with gjournal.| From | Sent On | Attachments |
|---|---|---|
| Pawel Jakub Dawidek | Jun 19, 2006 1:13 pm | |
| Niki Denev | Jun 19, 2006 6:32 pm | |
| Brooks Davis | Jun 19, 2006 6:57 pm | |
| Craig Rodrigues | Jun 20, 2006 6:35 am | |
| Pawel Jakub Dawidek | Jun 20, 2006 8:38 am | |
| Pawel Jakub Dawidek | Jun 20, 2006 8:43 am | |
| Alex Dupre | Jun 20, 2006 9:05 am | |
| Pawel Jakub Dawidek | Jun 20, 2006 9:14 am | |
| Phil Regnauld | Jun 20, 2006 10:28 am | |
| Mike Jakubik | Jun 20, 2006 7:20 pm | |
| Pawel Jakub Dawidek | Jun 20, 2006 7:38 pm | |
| Xin LI | Jun 20, 2006 7:59 pm | |
| Mike Jakubik | Jun 20, 2006 8:07 pm | |
| Bakul Shah | Jun 20, 2006 8:29 pm | |
| Scott Long | Jun 20, 2006 8:32 pm | |
| Ulrich Spoerlein | Jun 20, 2006 8:49 pm | |
| Pawel Jakub Dawidek | Jun 20, 2006 8:52 pm | |
| Bruce Evans | Jun 21, 2006 3:30 pm | |
| Pawel Jakub Dawidek | Jun 22, 2006 9:49 am | |
| Pawel Jakub Dawidek | Jun 22, 2006 9:55 am | |
| Pawel Jakub Dawidek | Jun 22, 2006 10:08 am | |
| Alexandr Kovalenko | Jun 23, 2006 8:22 am | |
| R. B. Riddick | Jun 23, 2006 8:38 am | |
| Alexandr Kovalenko | Jun 23, 2006 8:53 am | |
| Eric Anderson | Jun 23, 2006 3:20 pm | |
| Pawel Jakub Dawidek | Jun 23, 2006 7:42 pm | |
| Peter Jeremy | Jun 23, 2006 7:49 pm |
| Subject: | Journaling UFS with gjournal. | |
|---|---|---|
| From: | Brooks Davis (bro...@one-eyed-alien.net) | |
| Date: | Jun 19, 2006 6:57:42 pm | |
| List: | org.freebsd.freebsd-geom | |
On Mon, Jun 19, 2006 at 03:11:01PM +0200, Pawel Jakub Dawidek wrote:
How it works (in short). You may define one or two providers which gjournal will use. If one provider is given, it will be used for both - data and journal. If two providers are given, one will be used for data and one for journal. Every few seconds (you may define how many) journal is terminated and marked as consistent and gjournal starts to copy data from it to the data provider. In the same time new data are stored in new journal. Let's call the moment in which journal is terminated as "journal switch".
Cool solution! I think I'll give this a try on my redundent mirror server at work. I'd be curious to see how gjournal performs with the journal on a battery backed ram disk like the gigabyte i-RAM:
It seems like that could reduce or eliminate many of the performance issues in practice.
-- Brooks