Re: [gentoo-user] Re: Finally got a SSD drive to put my OS on

[Frank Steinmetzger <Warp_7@gmx.de>]

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Am Wed, Apr 19, 2023 at 06:32:45PM -0500 schrieb Dale:
> Frank Steinmetzger wrote:
> > <<<SNIP>>>
> >
> > When formatting file systems, I usually lower the number of inodes from the 
> > default value to gain storage space. The default is one inode per 16 kB of 
> > FS size, which gives you 60 million inodes per TB. In practice, even one 
> > million per TB would be overkill in a use case like Dale’s media storage.¹ 
> > Removing 59 million inodes × 256 bytes ≈ 15 GB of net space for each TB, not 
> > counting extra control metadata and ext4 redundancies.
> 
> If I ever rearrange my
> drives again and can change the file system, I may reduce the inodes at
> least on the ones I only have large files on.  Still tho, given I use
> LVM and all, maybe that isn't a great idea.  As I add drives with LVM, I
> assume it increases the inodes as well.

I remember from yesterday that the manpage says that inodes are added 
according to the bytes-per-inode value.

> I wonder.  Is there a way to find out the smallest size file in a
> directory or sub directory, largest files, then maybe a average file
> size???

The 20 smallest:
`find -type f -print0 | xargs -0 stat -c '%s %n' | sort -n | head -n 20`

The 20 largest: either use tail instead of head or reverse sorting with -r.
You can also first pipe the output of stat into a file so you can sort and 
analyse the list more efficiently, including calculating averages.

> I thought about du but given the number of files I have here,
> it would be a really HUGE list of files.  Could take hours or more too. 

I use a “cache” of text files with file listings of all my external drives. 
This allows me to glance over my entire data storage without having to plug 
in any drive. It uses tree underneath to get the list:

`tree -afx -DFins --dirsfirst --du --timefmt "%Y-%m-%d %T"`

This gives me a list of all directories and files, with their full path, 
date and size information and accumulated directory size in a concise 
format. Add -pug to also include permissions.

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