With R81.20 after you install an HFA, it is kept on the lv_current partition. If you were to update even every other HFA, that would start filling up your lv_current partition and stop you eventually from updating anymore without a resize of the partitions or exporting the management and installing it new. I have seen mentions that you need to keep the previously installed HFAs on the management and the ability to remove them from Gaia web interface was disabled at some point.
While certainly it makes sense you would need them if you need to revert to an older HFA, but I have read some conflicting information mentioning that they are needed for future upgrades (not sure if that means future HFAs also).
There were around 47 HFA releases over the supported lifetime of R80.40 for example., That would be a problem if you wanted to install every HFA. A have seen management take about 29 GB on the lv_current partition with only 2 HFAs installed. It appears to take around 1.2 to 1.5 GB for every HFA install to be kept. That would come out to be 54 GB (using 1.2GB per) of just HFAs that were kept on the server if you upgraded to every HFA. that would push the lv_current partition even bigger (83GB) than what the maximum is supported (68 GB if I recall correctly). That is of course an extreme case, but with upgrades mentioning you should have 20 GB free, space can easily be used up quickly even with only a dozen of them installed. Most default installs that I have done on open platform have defaulted to about 35GB for the lv_current partitions BTW.
How are people managing this now with newer versions? At least with R81.20, It appears the ability to remove already installed HFAs in the Gaia web UI has been disabled.
My questions...
1. Is it required to keep all HFAs that have been installed on the system?
1a. If yes then how can we manage the space that would consume over time with many HFAs installed?
1b. If no then why was the ability to delete already installed HFAs removed from Gaia web UI?
Is there an article I have missed that explains how to manage already installed HFAs? It would be great to have an official article on it otherwise. I am hoping the answer is not that they are all required and people that update every HFA will just have to export/import into another management at some point in time.
I specified Management forum but this would apply for gateways too at some point if enough HFAs are installed.