Re: moving from raw chunks to cooked files
Yeah, Linus has been trying to get rid of RAW files for many years. I wish he'd just give it up. Anyway, there is no problem using cooked files, and migrating the data is as simple as dd'ing the data from the RAW devices to new filesystem files and then relinking the link paths that IDS using to access the RAW devices to the filesystem files. You should use the simplest filesystem available, no journalled filesystems like EXT3 and EXT4. I would suggest just using an old EXT2 filesystem as the best choice. It's very low overhead compared to the more modern filesystems. Another option, BTW, would be to use COOKED (aka block) devices rather than filesystem files. COOKED devices tend to be a little faster than filesystem files even with DIRECT_IO enabled on both. Art Art S. Kagel Advanced DataTools (www.advancedatatools.com) IIUG Board of Directors (art@iiug.org) Disclaimer: Please keep in mind that my own opinions are my own opinions and do not reflect on my employer, Advanced DataTools, the IIUG, nor any other organization with which I am associated either explicitly, implicitly, or by inference. Neither do those opinions reflect those of other individuals affiliated with any entity with which I am affiliated nor those of the entities themselves. On Wed, Aug 25, 2010 at 10:43 AM, Aleksander Kamenik < aleksander@krediidiinfo.ee> wrote: > Hi, > > We're running Suse Linux Enterprise Server on x86 and with the latest > SLES11SP1 release notes comes this announcement: > > "The RAW devices are deprecated and will be removed with one of the next > Service Packs or SUSE Linux Enterprise Server 12." > > I'm about to reinstall Informix onto new drives so might as well migrate to > cooked files. > > What filesystem is recommended? Are there any significant performance > issues nowadays? > > Currently I have two raw devices which contain a total of 18 chunks. I > would like to see them as 18 files on four different drives/partitions after > the migration. I can't find any documentation on migrating to cooked files. > Is this even possible? > > Using Informix 11.50.UC7. > > Regards, > > Aleksander Kamenik > System Administrator > Krediidiinfo AS > an Experian Company > Phone: +372 665 9649 > Email: aleksander@krediidiinfo.ee > > http://www.krediidiinfo.ee/ > http://www.experiangroup.com/ > > > _______________________________________________ > Informix-list mailing list > Informix-list@iiug.org > http://www.iiug.org/mailman/listinfo/informix-list >