Article about the OSD Journal

Article about the OSD Journal

[Marcel Lauhoff]

Hi,

another shameless plug: I wrote an article about the OSD Journal:

http://irq0.org/articles/ceph/journal

It focuses on the "How?" with some pointers to the code.

I hope someone will find it useful. Feedback is greatly appreciated!

~marcel

--
Marcel Lauhoff
Mail/XMPP: ml@irq0.org
http://irq0.org

Re: Article about the OSD Journal

[Alexandre DERUMIER]

Hi,

thanks you very much ! It's very very nice article.

I didn't known about "nojournal" feature. 
Does it make sense for full ssd setup ? or is it only a test/debug option ?


----- Mail original -----
De: "Marcel Lauhoff" <ml@irq0.org>
À: "ceph-devel" <ceph-devel@vger.kernel.org>
Envoyé: Mardi 24 Mars 2015 22:49:37
Objet: Article about the OSD Journal

Hi, 

another shameless plug: I wrote an article about the OSD Journal: 

http://irq0.org/articles/ceph/journal 

It focuses on the "How?" with some pointers to the code. 

I hope someone will find it useful. Feedback is greatly appreciated! 

~marcel 

-- 
Marcel Lauhoff 
Mail/XMPP: ml@irq0.org 
http://irq0.org 
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Re: Article about the OSD Journal

[Marcel Lauhoff]

Hi,

Alexandre DERUMIER <aderumier@odiso.com> writes:

> Hi,
>
> I didn't known about "nojournal" feature.
> Does it make sense for full ssd setup ? or is it only a test/debug option ?

To the best of my knowledge, no, "nojournal" isn't an alternative.

In nojournal mode transaction commit acknowledgements are fired after a
sync of the data disk. Meaning every 0.01 - 5 seconds in bulk.

~marcedl

--
Marcel Lauhoff
Mail/XMPP: ml@irq0.org
http://irq0.org