Hi all, Now that solid state disks are getting affordable (Gigabyte iRam, for example), it makes sense to use them as external journal with full data journaling, so they cache all the small writes and dump them to disks in one single sequential write on every journal flush.
I know how to configure that under ext3. Simply set up external journal and mount filesystem with data=journal and commit=600 or some such value. But I'm not so sure about reiserfs. I know it now knows how to do full data journaling, but I can't find the docs anywhere that would mention commit mount option. Does it work at all and does it work in the same way as for ext3? Also, I've seen patches by Jeff Mahoney from november last year that optimize some external journal defaults. I'm thinking about a 7Tb or so Coraid AoE device with 4gb iRam as external journal ... does anyone run something like this in production? How well does it work? Jeff, are your pathces already in the Linus tree or do I have to use some -mm or Suse kernel? -- Jure Pečar http://jure.pecar.org
