From: Andrew Thrift <andrew-3e6jenk95VYpDvLZ8AWkcaVXKuFTiq87@public.gmane.org>
To: Roy Sigurd Karlsbakk
<roy-ooPBL11mRiZbRRN4PJnoQQ@public.gmane.org>,
linux-bcache-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: bcache vs enhanceio?
Date: Fri, 08 Feb 2013 12:05:49 +1300 [thread overview]
Message-ID: <5114334D.7040709@networklabs.co.nz> (raw)
In-Reply-To: <14121605.34.1360272310720.JavaMail.root@zimbra>
Hi Roy,
This is by design, and minimizes the potential for data corruption.
If you have a backing device with an existing filesystem, and are
caching this in writeback mode, then reboot the system and the cache
device does not come up, the backing device could still come up and
could potentially be out of sync with the writes that were buffered to
the cache device.
With bcache in writeback mode, if it cannot attach the cache device it
will not register the backing device.
I am sure Kent will provide a much better answer than I have :)
Regards,
Andrew
On 2/8/2013 10:25 AM, Roy Sigurd Karlsbakk wrote:
> Hi
>
> Seems old flashcache and the new enhanceio can add flash drives on the run, while bcache needs the filsystem to be built with them.
>
> What is the future of bcache in this setting?
>
next prev parent reply other threads:[~2013-02-07 23:05 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-07 21:25 bcache vs enhanceio? Roy Sigurd Karlsbakk
2013-02-07 23:05 ` Andrew Thrift [this message]
[not found] ` <5114334D.7040709-3e6jenk95VYpDvLZ8AWkcaVXKuFTiq87@public.gmane.org>
2013-02-12 20:41 ` Roy Sigurd Karlsbakk
2013-02-12 21:56 ` Kent Overstreet
[not found] ` <20130212215629.GJ27179-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>
2013-02-19 12:48 ` Joseph Glanville
[not found] ` <CAOzFzEiLeW=nvuwcrVrs2xO__92ze7b6BDt8MkAkaNctuSR9Vg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-02-19 15:33 ` Joseph Glanville
2013-02-19 16:47 ` Jason Warr
[not found] <20130213041453.9D6F6F5149@zimbra.karlsbakk.net>
[not found] ` <20130213041453.9D6F6F5149-QnAKKd0jTYMSbMbpMVjRk+TW4wlIGRCZ@public.gmane.org>
2013-02-19 12:23 ` Roy Sigurd Karlsbakk
2013-02-19 16:41 ` Jason Warr
[not found] ` <5123AB2B.9020209-/cow75dQlsI@public.gmane.org>
2013-02-19 17:17 ` Joseph Glanville
[not found] ` <CAOzFzEj=Gna7AQK9f01i9a64qXw0TFjNPjsEViTRcaLKDdcHpg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2013-02-19 17:42 ` Jason Warr
[not found] ` <5123B976.6050400-/cow75dQlsI@public.gmane.org>
2013-02-19 20:40 ` Kent Overstreet
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=5114334D.7040709@networklabs.co.nz \
--to=andrew-3e6jenk95vypdvlz8awkcavxkuftiq87@public.gmane.org \
--cc=linux-bcache-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \
--cc=roy-ooPBL11mRiZbRRN4PJnoQQ@public.gmane.org \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox