Re: How To create raw devices in Red Hat 5.2

>In article <7a9b9f$gtg$1@nnrp1.dejanews.com>, neil_rutherford@yahoo.com wrote: >I have not done much RDBMS in a while, but I know with Sybase, you can spacify a >partition that has not been allocated by a filesystem. I suspect all you >would have to do is have the partition created on the hard drive, and then >point the database at it. The raw linux disk drivers should work, as long >as Informix knows how to deal with them. I think you may have missed the point. AFAIK, _Linux_ doesn't support raw devices. Informix supports them fine. :-) >> I asked the same question a month or so ago and put it mildly, >> i believe you can create raw devices.... known as special character >> devices.... still don't know how, yet, i've read in the release >> notes that the kernel doesn't raw devices buffering or none-buffering ( i >> can't remember ), so they said they don't support it, due to the fact that >> there will be no performance gains over fried (cooked) files. >> Does that make any sense? >> Therefore cooked files has the same performance as raw disk. >> >> In article <36C76008.2DF2319B@weideneder.de>, >> Stefan Weideneder <stefan@weideneder.de> wrote: >> > Ricardo wrote: >> > > >> > > Hi, >> > > >> > > Does any one knows how to create a raw device for a Informix chunk? >> > > >> > > TIA >> > > NB >> > >> > Hi Ricardo, >> > >> > are you sure that Informix supports "raw devices" for your >> > Linux workstation ? Far as I know there's no way to create >> > raw devices - sure, you can try by using "mknod" but, I guess >> > your system will tell you the same as my "SuSe" Linux. >> > >> > Anyhow, the I/O performs pretty good. I got a throughput >> > of about 4MB/sec for random write operations per disk. >> > That's much more than on other platforms. >> > >> > Best regards >> > >> > Stefan Weideneder >> > >> >> -----------== Posted via Deja News, The Discussion Network ==---------- >> http://www.dejanews.com/ Search, Read, Discuss, or Start Your Own > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com