Re: How capacious and well-indexed are ext4, xfs and btrfs directories?

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To: "Darrick J. Wong" <djwong@xxxxxxxxxx>
Subject: Re: How capacious and well-indexed are ext4, xfs and btrfs directories?
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Tue, 25 May 2021 06:00:59 +0100
Cc: Josh Triplett <josh@xxxxxxxxxxxxxxxx>, Andreas Dilger <adilger@xxxxxxxxx>, David Howells <dhowells@xxxxxxxxxx>, "Theodore Ts'o" <tytso@xxxxxxx>, Chris Mason <clm@xxxxxx>, Ext4 Developers List <linux-ext4@xxxxxxxxxxxxxxx>, xfs <linux-xfs@xxxxxxxxxxxxxxx>, linux-btrfs <linux-btrfs@xxxxxxxxxxxxxxx>, linux-cachefs@xxxxxxxxxx, linux-fsdevel <linux-fsdevel@xxxxxxxxxxxxxxx>, NeilBrown <neilb@xxxxxxxx>
In-reply-to: <20210525042136.GA202068@locust>
References: <206078.1621264018@warthog.procyon.org.uk> <6E4DE257-4220-4B5B-B3D0-B67C7BC69BB5@dilger.ca> <YKntRtEUoxTEFBOM@localhost> <20210525042136.GA202068@locust>

On Mon, May 24, 2021 at 09:21:36PM -0700, Darrick J. Wong wrote:
> Synchronous discard is slow, even on NVME.

That really depends on the device.  Some are specifically optimized for
that workload due to customer requirements.

References:
- How capacious and well-indexed are ext4, xfs and btrfs directories?
  - From: David Howells
- Re: How capacious and well-indexed are ext4, xfs and btrfs directories?
  - From: Andreas Dilger
- Re: How capacious and well-indexed are ext4, xfs and btrfs directories?
  - From: Josh Triplett
- Re: How capacious and well-indexed are ext4, xfs and btrfs directories?
  - From: Darrick J. Wong

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