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>> -----Original Message----- |
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>> From: Wols Lists <antlists@××××××××××××.uk> |
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>> Sent: Friday, December 10, 2021 11:25 AM |
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>> To: gentoo-user@l.g.o |
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>> Subject: Re: [gentoo-user] Re: [OT] suggest SSD partitioning |
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>> On 10/12/2021 15:16, Nikos Chantziaras wrote: |
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>> > If you can't do that, then it doesn't matter much whether you use a |
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>> > swap file or partition. On an SSD, both should perform about the same. |
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>> > On an HDD, swap files could run into fragmentation issues if you |
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>> > resize them or create them incorrectly. On an SSD, fragmentation |
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>> > doesn't have much of an impact. A swap file gives you the option to |
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>> > resize it later on without having to do filesystem and partition |
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>> > resizing, so I'd say a swap file sounds better. |
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>> 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. |
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>> 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 ...) |
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>> Cheers, |
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>> Wol |
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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.
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Since BTRFS is a storage pool model, everything else can dynamically resize similarly to using LVM.
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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.
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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.
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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.
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LMP |
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