From: Dave Eckhardt <davide+p9@cs.cmu.edu>
To: 9fans <9fans@9fans.net>
Subject: Re: [9fans] Throwing in the Towel
Date: Sun, 26 May 2024 21:06:14 -0400 [thread overview]
Message-ID: <16277.1716771974@lunacy.ugrad.cs.cmu.edu> (raw)
In-Reply-To: <17167523800.5BBf3dBb0.7751@composer.9fans.topicbox.com>
> Can it be the case that the venti index file exhibits a desastrous
> write pattern for SSDs?
Maybe... but it would need to be worse than the load provided by
other file systems, including FAT and ext2/3/4. Some of those
file systems rewrite some blocks like mad (e.g., superblock, journal
blocks).
Just because a flash translation layer might need to erase an entire
megabyte, or multiple megabytes, does not mean that it needs to put
the new value of a logical block in the same area of the flash that
the old value of that logical block used to be in (they do the opposite).
It would be interesting to get a dump of the SMART data for the drive(s)
that went bad, and also drive(s) that didn't go bad.
Dave Eckhardt
------------------------------------------
9fans: 9fans
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next prev parent reply other threads:[~2024-05-27 1:06 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-04 15:13 Steven Stallion
2024-05-04 19:16 ` [9fans] Plan9 wept! - " Alexandr Babic
2024-05-04 20:21 ` [9fans] " Shawn Rutledge
2024-05-04 20:37 ` wb.kloke
2024-05-26 19:39 ` wb.kloke
2024-05-26 21:20 ` Riddler
2024-05-27 1:06 ` Dave Eckhardt [this message]
2024-05-28 19:33 ` wb.kloke
2024-05-28 21:49 ` Charles Forsyth
2024-05-29 2:22 ` Dave Eckhardt
2024-05-29 3:32 ` ori
2024-05-29 6:40 ` Steve Simon
2024-05-29 8:29 ` wb.kloke
2024-05-29 8:17 ` hiro
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