Thank you very much! Mr. Konishi. Best wishes Assaf Weizman On Mon, Mar 8, 2010 at 12:08 PM, Ryusuke Konishi <ryusuke@xxxxxxxx> wrote: > > Hi, > On Mon, 8 Mar 2010 10:59:44 +0200, Assaf Weizman wrote: > > Hello, > > Could you please explain a few theoretical questions: > > a. What's the meaning/usage of the "Super Root Block"? > > b. in the Readme (v2) file it's described as "an optional super root > > block (SR)". So as optional element, who chooses to whether to > > activate\use it or not? > > The super root block contains inodes of checkpoint file (cpfile), > segment usage file (sufile), and disk address translation (DAT) file. > > It represents the top of metadata hierarchy of NILFS at a time point. > For the metadata hierarchy, please see the page 9 of the slides: > > http://www.nilfs.org/papers/jls2009-nilfs.pdf > > > I think the term "optional" in the readme looks confusing. > > In nilfs, if a series of logs makes a new checkpoint, it essentially > ends with a super root block. Otherwise, it does not entail the super > root block (there is a variant of log series used for synchronous data > write). > > > Thanks a lot. this is a very interesting file system. > > > > Best regards > > Assaf Weizman > > Thank you. I think the above slides would be helpful than the readme > file. > > With regards, > Ryusuke Konishi -- To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
