[Gluster-users] sticky bit?

Matthew Wilkins daibutsu at gmail.com
Wed Apr 8 22:58:48 UTC 2009


hi there,

i am doing some testing of 2.0.0rc7 on two RHEL machines.  i have a
nufa setup, my config is below.
files that i create have the sticky bit set on them, why is that?  in detail:

on mu-rhdev1 i create the file /mnt/foo1 (where gluster is mounted on
/mnt), i do an ls

[root at mu-rhdev1 glusterfs]# vi /mnt/foo1
[root at mu-rhdev1 glusterfs]# ls -l /mnt/ /export/brick0/
/export/brick0/:
total 4
-rw-r--r-T 1 root root 3 Apr  8 14:55 foo1

/mnt/:
total 4
-rw-r--r-T 1 root root 3 Apr  8 14:55 foo1

and on mu-rhdev2 i see:

[root at mu-rhdev2 mnt]# ls -l /mnt/ /export/brick0/
/export/brick0/:
total 4
---------T 1 root root 0 Apr  8 14:55 foo1

/mnt/:
total 4
-rw-r--r-T 1 root root 3 Apr  8 14:55 foo1

so what are those sticky bits doing there?  also why is foo1 showing
up in mu-rhdev2:/export/brick0?  is this a namespace?

now i create a file on mu-rhdev2:

[root at mu-rhdev2 mnt]# vi /mnt/foo2
[root at mu-rhdev2 mnt]# ls -l /mnt/ /export/brick0/
/export/brick0/:
total 8
---------T 1 root root 0 Apr  8 14:55 foo1
-rw-r--r-- 1 root root 5 Apr  8 14:55 foo2

/mnt/:
total 8
-rw-r--r-T 1 root root 3 Apr  8 14:55 foo1
-rw-r--r-- 1 root root 5 Apr  8 14:55 foo2

no sticky bits on foo2!  and on mu-rhdev1 it looks like:

root at mu-rhdev1 glusterfs]# ls -l /mnt/ /export/brick0/
/export/brick0/:
total 4
-rw-r--r-T 1 root root 3 Apr  8 14:55 foo1

/mnt/:
total 8
-rw-r--r-T 1 root root 3 Apr  8 14:55 foo1
-rw-r--r-- 1 root root 5 Apr  8 14:55 foo2

foo2 doesn't show up as zero size in /export/brick0, perhaps it will
over time or if i stat it from mu-rhdev1?

thanks for any help in clarifying what is happening here.  here is my config:

volume posix
 type storage/posix
 option directory /export/brick0
end-volume

volume locks
 type features/locks
 subvolumes posix
end-volume

volume brick
 type performance/io-threads
 subvolumes locks
end-volume

volume server
 type protocol/server
 option transport-type tcp
 option auth.addr.brick.allow *
 subvolumes brick
end-volume

volume mu-rhdev1
 type protocol/client
 option transport-type tcp
 option remote-host mu-rhdev1
 option remote-subvolume brick
end-volume

volume mu-rhdev2
 type protocol/client
 option transport-type tcp
 option remote-host mu-rhdev2
 option remote-subvolume brick
end-volume

volume nufa
  type cluster/nufa
  option local-volume-name `hostname`
  subvolumes mu-rhdev1 mu-rhdev2
end-volume

volume writebehind
  type performance/write-behind
  option cache-size 1MB
  subvolumes nufa
end-volume

# before or after writebehind?
volume ra
  type performance/read-ahead
  subvolumes writebehind
end-volume

volume cache
  type performance/io-cache
  option cache-size 512MB
  subvolumes ra
end-volume



matt




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