Re: Raw space vs filesystem

Im Artikel <59uu55$db2@flood.xnet.com>, dvs@flood.xnet.com (Dinesh Salegame) schreibt: >Hi, > > I wanted to find out what are the pros and cons of using raw vs regular > filesystems for dbspaces. We are using Informix 7.2 and HP UX 10.01. > Any comments on how to use the LVM in this context is greatly >appreciated ! It's really simple: A raw device is more saver than a cooked device. With a raw device, the application (INFORMIX) writes directly to the disk. With a cooked device, the application (INFORMIX) writes to the file system buffer, and you dont't know, what time goes by until the data will be written to disk. A cooked device, also can be destroyed more simpler than a raw device. If you need "quick and dirty" dbspaces (e.g. for test databases), than you can use a cooked device. In all other ways, you should use raw devices. Hope that helps, by Volker Fraenkle