["SOLVED"] Re: [gentoo-user] Re: [OT] suggest SSD partitioning

On 2021-12-10 20:51, Laurence Perkins wrote:
>>>
>>>
>>> -----Original Message-----
>>> From: Wols Lists <antlists@××××××××××××.uk>
>>> Sent: Friday, December 10, 2021 11:25 AM
>>> To: gentoo-user@l.g.o
>>> Subject: Re: [gentoo-user] Re: [OT] suggest SSD partitioning
>>>
>>> On 10/12/2021 15:16, Nikos Chantziaras wrote:
>>> > If you can't do that, then it doesn't matter much whether you use a
>>> > swap file or partition. On an SSD, both should perform about the same.
>>> > On an HDD, swap files could run into fragmentation issues if you
>>> > resize them or create them incorrectly. On an SSD, fragmentation
>>> > doesn't have much of an impact. A swap file gives you the option to
>>> > resize it later on without having to do filesystem and partition
>>> > resizing, so I'd say a swap file sounds better.
>>>
>>> It very much does matter whether you use a swap file or partition in
>>> practice. I've just been reading right now a discussion about systemd
>>> logging and hibernation, and how btrfs handles swap files. It sounds
>>> nasty.
>>>
>>> If you have a swap file, linux creates an immutable file then uses
>>> direct disk i/o. There's a LOT of unnecessary crap there that could
>>> go wrong. Just avoid all that trouble and give yourself a decent swap
>>> partition. (And if you're running btrfs, a lot of this sounds
>>> experimental and dangerous ...)
>>>
>>> Cheers,
>>> Wol
>>>
>>>
>
> For BTRFS I usually do one partition for the whole system and one
> partition for swap and then use subvolumes for /home and anything else
> I want to keep separate in case of reinstall.
>
> Since BTRFS is a storage pool model, everything else can dynamically
> resize similarly to using LVM.
>
> Swap files in general aren't as reliable if one is planning to
> hibernate the system.  Swap files on BTRFS should go through a loop
> device unless you set them up really carefully.
>
> There's no reason you can't have both swap files and a swap partition.
>  I occasionally end up dynamically adding more when I get a program
> that uses a terabyte of virtual but very little resident at a time or
> something.
>
> Swap onto zram devices can also be a useful tool if the data being
> swapped is more highly compressible than zswap will take advantage of.
>
> LMP

Thanks to all for hints. I've created a swap partition.

Pat

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