>>> On 3/27/2009 at 1:17 AM, Fred Schmidt <[email protected]> wrote: > Would somebody please clarify - is LVM striping still of benefit to > performance if your disk is RAID? > > If so, why?
If you mean the disks in the storage array itself, then yes, because z/VM and Linux can only start one I/O to a single device address at a time. (Unless you're using PAV.) If your LVs are striped across multiple devices, then you have the potential of starting multiple I/Os to multiple device addresses concurrently. If you mean software RAID within the Linux system, then perhaps less so. Mark Post ---------------------------------------------------------------------- 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
