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Re: [Gluster-devel] can't make dht work


From: Dan Parsons
Subject: Re: [Gluster-devel] can't make dht work
Date: Tue, 13 Jan 2009 10:49:09 -0800

I think I have possibly found some more useful information on this issue.

It appears that the problem only happens if my first write to dht is with 'dd'. If I copy a normal file to the system first, everything works fine from that point forward.

However, if I unmount gluster and re-mount it, even though my original files come back, I still have to copy a regular file again before dd will work. Obviously dd is not important to my production use but it is sort of a disconcerting bug, I have to say.

Here's some log output:

This happens when I try to use dd first:
2009-01-13 10:45:54 E [dht-helper.c:216:dht_subvol_get_hashed] dht0: layout missing path=/ddtest.txt parent=1 2009-01-13 10:45:54 E [dht.c:623:dht_lookup] dht0: no subvolume in layout for path=/ddtest.txt 2009-01-13 10:45:54 E [fuse-bridge.c:406:fuse_entry_cbk] glusterfs- fuse: 2: LOOKUP() /ddtest.txt => -1 (Invalid argument)

This happens on the first copy of a regular file to gluster:
2009-01-13 10:45:59 W [dht-layout.c:452:dht_layout_normalize] dht0: directory / looked up first time 2009-01-13 10:45:59 W [dht.c:132:dht_lookup_dir_cbk] dht0: fixing assignment on /

From that point onwards, everything works correctly, until I unmount and remount, in which case I have to copy a regular file again.


Dan Parsons


On Jan 13, 2009, at 10:08 AM, Dan Parsons wrote:

I have tried that and get the same problem every time.


Dan Parsons


On Jan 13, 2009, at 3:37 AM, Krishna Srinivas wrote:

Dan,
Can you removie the backend directories and re-create it and try this again?
Krishna

On Tue, Jan 13, 2009 at 6:31 AM, Dan Parsons <address@hidden> wrote:
I'm unable to make dht work. I simply can't copy files to it without getting the below error. If I make a subdirectory and put files inside of that, then the problem goes away, but it seems like I must be doing something wrong.
???

Client error message:
2009-01-12 16:54:03 E [dht-helper.c:216:dht_subvol_get_hashed] dht0: layout
missing path=/test3.txt parent=1
2009-01-12 16:54:03 E [dht.c:623:dht_lookup] dht0: no subvolume in layout
for path=/test3.txt
2009-01-12 16:54:03 E [fuse-bridge.c:406:fuse_entry_cbk] glusterfs- fuse: 2:
LOOKUP() /test3.txt => -1 (Invalid argument)

Command I ran:
dd if=/dev/zero of=/glustertmp/test3.txt bs=1MB count=10

Server config:
############################################################################
# UNIFY
volume posix-unify-brick
     type storage/posix
     option directory /distfs-storage-space/glusterfs/unify
end-volume

volume server
     type protocol/server
     option transport-type tcp
     option auth.addr.posix-unify-brick.allow 10.8.101.*
     subvolumes posix-unify-brick
end-volume

Client config:
#################################################################
# CLIENT-UNIFY-1
volume distfs01-unify-brick
type protocol/client
option transport-type tcp
option remote-host 10.8.101.51
option remote-subvolume posix-unify-brick
end-volume

#################################################################
# CLIENT-UNIFY-2
volume distfs02-unify-brick
type protocol/client
option transport-type tcp
option remote-host 10.8.101.52
option remote-subvolume posix-unify-brick
end-volume

#################################################################
# CLIENT-UNIFY-3
volume distfs03-unify-brick
type protocol/client
option transport-type tcp
option remote-host 10.8.101.53
option remote-subvolume posix-unify-brick
end-volume

#################################################################
# CLIENT-UNIFY-4

volume distfs04-unify-brick
type protocol/client
option transport-type tcp
option remote-host 10.8.101.54
option remote-subvolume posix-unify-brick
end-volume

# END OF CLIENT-UNIFY
################################################################

volume dht0
     type cluster/dht
     subvolumes distfs01-unify-brick distfs02-unify-brick
distfs03-unify-brick distfs04-unify-brick
end-volume


Dan Parsons




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