![]() With the CPG space figures you need to be aware if you have other CPG’s on the same set of physical disks they will also be competing for the space. and tells you how much space is actually available for volumes to grow into. Writeable space takes account of the amount of space consumed by raid parity, system space etc. So the above screenshot shows that there is 10,387GiB of writeable space left on this CPG. The stat you are interested in is estimated free system space, shown in the bottom management pane.Choose summary in the bottom management pane.In the management pane on the top right highlight the name of the CPG you want to look at.Then from the management tree highlight CPG’s.Select provisioning from the navigation pane.This part deals with the question how much writeable space have I got left in the CPG. Ok so now we know how much space is left on our physical disks but the key question is how much actual writeable space is left for critical stuff like the marketing department to store their pictures in. Like below, I’m looking at what proportion of the allocated space is taken up by the volume itself and how much is snapshot space. You can keep drilling down further and further on an item. If you expand the disk class you are interested in you will see it then splits this into space used by the system v space used by volumes Next you want to know what’s gobbling up all that space. So for example the above screen shot shows the fast class disks are 88.51% full. The top of the windows shows the total for all the different types of disks in your system and then breaks this down by disk type below, this is then further broken down into allocated and free space. In the management window choose the capacity tab.Highlight the name of your SAN in the management tree.Select systems from the navigation pane.This is simply as a percentage how full are the disks. The first thing to understand is how much capacity has been consumed on the physical disks. If you still use the 3PAR management console read on. To view writeable capacity left on a CPG as in part 2 run the below, the figure you are interested in is LD free showspace -cpg cpgname -(MB)- CPG -EstFree-Usr-Snp-Adm- Name RawFree LDFree Total Used Total Used Total Used R6 15954816 10636544 2051840 2048000 0 0 0 0 3PAR Management Console Raw Space To view get a similar view of disk capacity utilisation as in part 1 run If you are a command line junkie you can get exactly the same stats from the CLI. Be mindful that multiple CPG’s can consume space from the same set of physical disks, check out our CPG Overview if you need a refresher on this This is the figure that shows the useable capacity available to the 3PAR. The figure you are really interested in is the Estimated maximum CPG size. CPG’s grow on demand and this figure will always show a small amount of free space. Once you finish nearly having a heart attack thinking you are about to run out of space, let me reassure you that this figure is highly misleading. When you look at this you will probably look at the free figure and see there is not much space left. In the right hand window look at the Capacity Summary widget. In the left hand pane choose the CPG you are interested in checking the available space for. If you cannot see this option choose show more from the top right For this we need to look at the CPG levelįrom the main menu choose Common Provisioning Groups. Potentially the figure you will be most interested in will be how much space is actually available to be written to i.e. The capacity measures we have looked at so far have shown raw space available in different ways. You can also drill down to the capacity for a single system by opening the main menu, and then choosing systems, then choosing the capacity view. the type of disk be that FC, NL or SSDĪllocated capacity – Another raw figure, this takes the total capacity allocated which means used and shows you what it is using up the space dividing it up by block, file and system The above widgets show the capacity for ALL systems connected to SSMC, to see the capacity information for a single system click on the widget in the dashboard. For clarity this raw capacity is just the sum of the capacity of all the disks in your system and takes no account of RAID levels, sparing etc.ĭevice Type Capacity – This again measures raw space but this view allows you to see it by device type i.e. Total capacity – This shows you the total raw capacity. In the dashboard you will see a number of widgets that will help you with your 3PAR capacity management, the widgets are as follows: When you open the 3 PAR SSMC you will see the dashboard view. ![]() The SSMC has simplified viewing the 3PAR capacity information significantly so lets start there . How much free capacity has my 3PAR got? This seems like a simple question but I see lots of questions about it. ![]()
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