our "building block" device size is 17263 MB, we use these devices to create striped Meta. We have so many customers/applications that it's very hard to use the same rule, we just try to use an even number.
All:  I've been told that the optimal number of meta members in a striped meta comprises multiples of 8.  This is supposed to give best concurrency because of the way the VMAX works.   No problem so far.  But I just had a customer request a LUN that would only comprise 2 of my metas at my current auto-meta size.   My installing engineer said I should minimize the number of different meta sizes throughout the box.  My assumption is b/c it becomes unwieldy and hard to keep track of a ton of different sizes.  Having said that, what are you guys all doing?  Do you even concern yourself with making 8 way metas for performance reasons?  If so, have you tested an 8 way against a 2 way to see what kind of difference you notice?  I'm curious if it's significant.  Also, are you creating custom metas for every request to match the customers' sizing requirements?  Thanks!!!!  Brandon
How many meta sizes do you have in a VMAX thin environment?