[Gluster-users] rogue file

[Eco Willson]

1. What is gluster supposed to do when a non-gluster file (no gluster xattrs) 
appears on a gluster brick?
If the file is not accessed via the client mount point, nothing will happen to the file from a Gluster standpoint

2. What does the current implementation actually do?
Once the file is accessed from the client mount point, the xattrs are appended to the file

3. Does it matter whether it is or is not a replicated brick?
4. Does it matter whether it is a striped brick?
Neither of these should matter.

Thinking about these scenarios after the file has been written:

A. No one ever looks at the file
Nothing will happen in this case

B. A self-heal runs
If the file has not had xattrs appended to it, self-heal will skip the file

C. A directory read gets done on that sub-directory
ls by itself will not append the xattrs, but a `stat` of the file will

D. Someone actually tries to read the file (like if it was called readme.txt 
or some other common name)
A stat or vi in this case will append the xattrs.

In 3.4beta4 it appears even an ls on the file will work.


Thanks,

Eco

----- Original Message -----
From: "Ted Miller" <tmiller at hcjb.org>
To: Gluster-users at gluster.org
Sent: Monday, July 8, 2013 3:20:17 PM
Subject: [Gluster-users] rogue file

A multi-part question relating to a scenario where a rogue program/person 
writes a file into a brick through the underlying file system (e.g. XFS) 
without going through glusterfs?

1. What is gluster supposed to do when a non-gluster file (no gluster xattrs) 
appears on a gluster brick?

2. What does the current implementation actually do?

3. Does it matter whether it is or is not a replicated brick?

4. Does it matter whether it is a striped brick?


Thinking about these scenarios after the file has been written:

A. No one ever looks at the file
B. A self-heal runs
C. A directory read gets done on that sub-directory
D. Someone actually tries to read the file (like if it was called readme.txt 
or some other common name)

Don't have an example at hand, just wondering what would happen as I work on 
putting together a test bed that will be either replica 2 or replica 4, 
unstriped.

Ted Miller
Elkhart, IN, USA


_______________________________________________
Gluster-users mailing list
Gluster-users at gluster.org
http://supercolony.gluster.org/mailman/listinfo/gluster-users