On Fri, Nov 28, 2008 at 11:31 PM, John Summerfield <[EMAIL PROTECTED]> wrote:
> I don't know enough to say "it's good," or "it's bad" > > I understand that finding the LVM and "opening" it might be relatively > slow, but once that is done I don't see any reason I/O to it would be > different from using a DOS-style partition. My understanding is that the file on LVM consists of blocks that are mapped by yet another layer. So your code path to read and write the blocks gets longer. When the CPU is very fast and I/O is very slow, this is probably not relevant because any code path is short compared to the I/O response, and the CPU would be wasted waiting for the I/O anyway. But when that difference is smaller and unused CPU is not wasted, it may make sense to review such things. It's probably something to put on my list to measure one day... Rob ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
