OK, so MDC is perhaps even not desired in our systems. The minidisks in question are several parts of the base filesystem, such as /var, /tmp, /var, /boot etc. Our datavolumes usually are placed in LVM and the LVM contains 3338 cylinder volumes. And CMS is very little in use, if MDC would be turned off for those we wouldn't notice that (or we execload the files if we did).
Now let's look at the sharing of DASD volumes and with multiple (non-CMS) minidisks on them. What, if any, would be the penalty if the DASD is shared on multiple VM's with linux minidisks? Like I stated before, VSE can't handle this if DASD is not set to SHARED (either minidisk or fullpack volumes). Would we get some unexpected IO queuing or even locks when two minidisks are accessed at the same time from different VM's? (Or to put it like this: if we start a guest om VM1 would the guest on VM2 still be able to access his minidisk that lives on the same pack?) Regards, Berry. ---------------------------------------------------------------------- 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
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