From: Eric Wheeler <bcache@lists.ewheeler.net>
To: Robert Krig <robert.krig@render-wahnsinn.de>
Cc: linux-bcache@vger.kernel.org
Subject: Re: Can you switch caching modes on the fly during use?
Date: Wed, 8 Feb 2023 18:38:25 -0800 (PST) [thread overview]
Message-ID: <6ea8441d-5dce-e516-652a-f86e88b22174@ewheeler.net> (raw)
In-Reply-To: <92a2df4d-3631-b669-c275-1f067ad72bd1@render-wahnsinn.de>
On Mon, 6 Feb 2023, Robert Krig wrote:
> Hi. I was just wondering.
>
> My cache device is a MD Raid1 SSD.
> My backing device is a BTRFS Raid10 on 8 Spinning disks.
>
>
> Everything is setup as default. Which, as far as I recall means writethrough
> caching.
>
> Can I just switch the caching mode on the fly while the filesystem is in use,
> without any risks of corruption, or do I need to detach the cache, unmount the
> FS, etc...?
Yep!
# cat /sys/block/bcache0/bcache/cache_mode
writethrough [writeback] writearound none
# echo writeback > /sys/block/bcache0/bcache/cache_mode
More info:
https://www.kernel.org/doc/Documentation/bcache.txt
-Eric
prev parent reply other threads:[~2023-02-09 2:38 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-06 9:54 Can you switch caching modes on the fly during use? Robert Krig
2023-02-09 2:38 ` Eric Wheeler [this message]
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