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From: Ric Wheeler <ricwheeler@gmail.com>
To: lsf-pc@lists.linux-foundation.org
Cc: Linux FS Devel <linux-fsdevel@vger.kernel.org>,
	linux-block@vger.kernel.org
Subject: [LSF/MM/BPF TOPIC] durability vs performance for flash devices (especially embedded!)
Date: Wed, 9 Jun 2021 06:53:29 -0400	[thread overview]
Message-ID: <55d3434d-6837-3a56-32b7-7354e73eb258@gmail.com> (raw)


Consumer devices are pushed to use the highest capacity emmc class devices, but 
they have horrible write durability.

At the same time, we layer on top of these devices our normal stack - device 
mapper and ext4 or f2fs are common configurations today - which causes write 
amplification and can burn out storage even faster. I think it would be useful 
to discuss how we can minimize the write amplification when we need to run on 
these low end parts & see where the stack needs updating.

Great background paper which inspired me to spend time tormenting emmc parts is:

http://www.cs.unc.edu/~porter/pubs/hotos17-final29.pdf



             reply	other threads:[~2021-06-09 10:53 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-09 10:53 Ric Wheeler [this message]
2021-06-09 18:05 ` Bart Van Assche
2021-06-09 18:30   ` Matthew Wilcox
2021-06-09 18:47     ` Bart Van Assche
2021-06-10  0:16       ` Damien Le Moal
2021-06-10  1:11         ` Ric Wheeler
2021-06-10  1:20       ` Ric Wheeler
2021-06-10 11:07         ` Tim Walker
2021-06-10 16:38           ` Keith Busch
     [not found]       ` <CAOtxgyeRf=+grEoHxVLEaSM=Yfx4KrSG5q96SmztpoWfP=QrDg@mail.gmail.com>
2021-06-10 16:22         ` Ric Wheeler
2021-06-10 17:06           ` Matthew Wilcox
2021-06-10 17:25             ` Ric Wheeler
2021-06-10 17:57           ` Viacheslav Dubeyko
2021-06-13 20:41 ` [LSF/MM/BPF TOPIC] SSDFS: LFS file system without GC operations + NAND flash devices lifetime prolongation Viacheslav Dubeyko

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