What does TSO ISPF ISMF 2 (volumes) 1 (DASD) show? 95TB of volumes and an average of 50% used? Or a quickref space list giving the above values?
Perhaps set some low utilized SMS volumes to Q,N then D,N and migrate the datasets on the volumes until empty so you have more spare? Perhaps consolidate some non-SMS volumes to other volumes then mark them as spares? With thin provisioning, you can over allocate the space but risk running out if your actual usage exceeds the actual installed capacity. Maybe allocate another 20TB in volumes? On Tue, Dec 30, 2014 at 5:02 AM, Lizette Koehler <[email protected]> wrote: > I was wondering if anyone has developed reports to relate the storage > (physical vs. virtual) on a VMAX 40K with what was actually being used on > the Mainframe. SAS, Excel are preferred. > > Due to the thin provisioning on the VMAX 40K I am finding it difficult to > graph what was ordered vs. what the VMAX 40K says is being used. Then > relate that to the storage I see on the Mainframe side. > > For example, say I have 100TB of storage on the VMAX 40K. I then create > TDATs, Thin pools, etc. with all of my DASD volume types. > I use ICKDSF to create the volumes and place them in various SMS pool or > setup NON SMS volumes. > > The dasd is then started to be allocated. > > On Unisphere, I show close to 100% Physical Storage used, however, the > Virtual pool says 45% used, which would leave 55% available on the VMAX > 40K. > > I then go to z/OS and see that most of my volumes have been defined and > placed where they are needed but not completely used. For example, I have > created a MOD54 and put it into use. However, the users have not created > enough datasets on that volume to fill it up. My understanding is that the > VMAX will not include that unused storage in the reports until it is used on > that Mod54. > > I also have a set with a unique name that indicates they are Spare volumes > that could be clipped and placed where needed. Those volumes total 5TB. > > I am asked by my management if I need more storage. > > So depending on the projects coming up I have 5TB of spare volumes that > could be used. But once those are used, I would need more storage. My > manager sees from Unisphere I have 55TB free from the virtual pool > allocation and wonders why I need more. > > Is there a method or process I can use that will show that even though we > have carved all the volume types fully on the VMAX 40K, because of thin > provisioning it is not all being used. At least not until every byte of > every volume is allocated with data sets. > > Do I really need to look at it from the z/OS perspective and not the VMAX > 40K side? > What is the recommendation when it comes to capacity planning for a VMAX 40K > in z/OS environments? > Any way to correlate the two worlds? > Due to the way open systems typically over provisions in the environment on > the VMAX 40K, it is difficult to know how to explain this with "management > speak" when it comes to z/OS. > > Thanks > > Lizette > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN -- Mike A Schwab, Springfield IL USA Where do Forest Rangers go to get away from it all? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
