-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Jure Pečar wrote: > 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?
Hi Jure - The kernel patches have been part of mainline since Nov 30, 2005. Any kernel newer than 2.6.15-rc4 will contain them. You may also want to patch your reiserfsprogs with the patch I posted along with the kernel patch. This just adjusts reiserfsprogs to use some sane defaults. I've attached it for convenience. - -Jeff - -- Jeff Mahoney SUSE Labs -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFD+0jOLPWxlyuTD7IRAgEEAJ9I+YbYoZEWTy8sRDOubKsY/mLZPQCfZWfF 4qBU1QZo5WyxzzrSgkGksP8= =NQSQ -----END PGP SIGNATURE-----
[PATCH] reiserfsprogs: changes for better external journal defaults.eml
Description: application/crossover-eml
