The % threshold at which to resize a file system ------------------------------------------------------- If the (file system size / device size) * 100 falls under this threshold then we perform a resize operation ------------------------------------------------------- Why is the threshold not set to 100%? - A completely extended file system may be size that is slightly less than that of the underlying block device - This is likely due to reserved sections that store file system metadata - Therefore we set the threshold to 99.999% to avoid unnecessary resize operations Why is the threshold set to 99.999%? - The largest EBS volume you can provision is a 64 TiB io2 Block Express volume.

The % tolerance to expect the logical volume size to be within ------------------------------------------------------- If the (logical volume size / volume group size) * 100 is less than (lvmConsumption% - tolerance%) then we perform a resize operation ------------------------------------------------------- If the (logical volume / volume group size) * 100 is greater than (lvmConsumption% + tolerance%) then the user is attempting a downsize operation.

The % threshold at which to resize a physical volume ------------------------------------------------------- If the (physical volume size / device size) * 100 falls under this threshold then we perform a resize operation ------------------------------------------------------- The smallest gp3 EBS volume you can create is 1GiB (1073741824 bytes).