From: willy@linux.intel.com (Matthew Wilcox)
Subject: Cmd - comp write
Date: Thu, 24 Apr 2014 13:43:31 -0400 [thread overview]
Message-ID: <20140424174331.GC5886@linux.intel.com> (raw)
In-Reply-To: <CAP8+hKW_GcTMv=ifM_D5ifhnV5cRo8dba3Uc4KzYHDtvXvxpWA@mail.gmail.com>
On Thu, Apr 24, 2014@10:03:30AM -0700, Learner Study wrote:
> Thanks. So its not really used to optimize SSD write operation
> per-se...correct? Its only used for locking purpose mainly. I'm not
> too familiar with the upper application layers...is "locking" a very
> common operation used in storage work? I would think so - for eg. to
> coordinate writes to namespaces and its accesses, this could be
> used...is that understanding correct?
Locking is almost never used. Usually one entity controls exclusive
access to the media and coordinates all accesses to it. The use case
is multipath environments like dual-ported drives or NAS where there may
be multiple independent entities competing for access to the same media.
prev parent reply other threads:[~2014-04-24 17:43 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-24 3:37 Cmd - comp write Learner
2014-04-24 9:50 ` Ebrahim Hashemi
2014-04-24 13:58 ` Matthew Wilcox
2014-04-24 17:03 ` Learner Study
2014-04-24 17:43 ` Matthew Wilcox [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20140424174331.GC5886@linux.intel.com \
--to=willy@linux.intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.