Re: [Users] Issues using local storage for gluster shared volume

[Tony Feldmann]

Great, I put things on xfs this weekend and all seems to be running fine.
Thanks for the info.


On Mon, Apr 1, 2013 at 2:45 AM, Vijay Bellur  wrote:

> On 03/29/2013 07:19 PM, Tony Feldmann wrote:
>
>> Aren't there concerns with xfs and large files in cases of failures?  I
>> was under the impression that if xfs was writing to a file and the
>> system died it would zero out the entire file.  Just hesitant to put
>> large vm files on a fs like that.  Is this still an issue with xfs?
>>
>
> There are no known problems with recent kernels. There are quite a few
> enterprise storage solutions that run on xfs.
>
> Thanks,
> Vijay
>
>
>> On Fri, Mar 29, 2013 at 1:08 AM, Vijay Bellur > > wrote:
>>
>> On 03/28/2013 08:19 PM, Tony Feldmann wrote:
>>
>> I have been trying for a month or so to get a 2 node cluster up
>> and
>> running.  I have engine installed on the first node, then add
>> each each
>> system as a host to a posix dc.  Both boxes have 4 data disks.
>>   After
>> adding the hosts I create a distributed replicate volume using 3
>> disk
>> from each host with ext4 filesystems. I click the 'optimize for
>> virt'
>> option on the volume.  There is a message in events that says
>> that it
>> can't set a volume option, then it sets 2 volume options.
>>   Checking the
>> options tab I see that it added the gid/uid options.  I was
>> unable to
>> find in the logs what option was not set, I just see a message
>> about
>> usage for volume set  .  The volume starts fine
>> and I
>> am able to create a data domain on the volume.  Once the domain is
>> created I try to create a vm and it fails creating the disk.
>>  Error
>> messages are along the lines of task file exists and can't
>> remove task
>> files.  There are directories under tasks and when trying to
>> manually
>> remove them I get the "directory not empty" error.  Can someone
>> please
>> shed some light on what I am doing wrong to get this 2 node
>> cluster with
>> local disk as shared storage up and running?
>>
>>
>> There are known problems with ext4 and gluster at the moment. Can
>> you please confirm if you see similar behaviour with xfs and gluster?
>>
>> Thanks,
>> Vijay
>>
>>
>>
>
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Re: [Users] Issues using local storage for gluster shared volume

[Vijay Bellur]

On 03/29/2013 07:19 PM, Tony Feldmann wrote:

Aren't there concerns with xfs and large files in cases of failures?  I
was under the impression that if xfs was writing to a file and the
system died it would zero out the entire file.  Just hesitant to put
large vm files on a fs like that.  Is this still an issue with xfs?


There are no known problems with recent kernels. There are quite a few 
enterprise storage solutions that run on xfs.


Thanks,
Vijay



On Fri, Mar 29, 2013 at 1:08 AM, Vijay Bellur mailto:vbel...@redhat.com>> wrote:

On 03/28/2013 08:19 PM, Tony Feldmann wrote:

I have been trying for a month or so to get a 2 node cluster up and
running.  I have engine installed on the first node, then add
each each
system as a host to a posix dc.  Both boxes have 4 data disks.
  After
adding the hosts I create a distributed replicate volume using 3
disk
from each host with ext4 filesystems. I click the 'optimize for
virt'
option on the volume.  There is a message in events that says
that it
can't set a volume option, then it sets 2 volume options.
  Checking the
options tab I see that it added the gid/uid options.  I was
unable to
find in the logs what option was not set, I just see a message about
usage for volume set  .  The volume starts fine
and I
am able to create a data domain on the volume.  Once the domain is
created I try to create a vm and it fails creating the disk.  Error
messages are along the lines of task file exists and can't
remove task
files.  There are directories under tasks and when trying to
manually
remove them I get the "directory not empty" error.  Can someone
please
shed some light on what I am doing wrong to get this 2 node
cluster with
local disk as shared storage up and running?


There are known problems with ext4 and gluster at the moment. Can
you please confirm if you see similar behaviour with xfs and gluster?

Thanks,
Vijay




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Re: [Users] Issues using local storage for gluster shared volume

[Tony Feldmann]

Aren't there concerns with xfs and large files in cases of failures?  I was
under the impression that if xfs was writing to a file and the system died
it would zero out the entire file.  Just hesitant to put large vm files on
a fs like that.  Is this still an issue with xfs?

On Fri, Mar 29, 2013 at 1:08 AM, Vijay Bellur  wrote:

> On 03/28/2013 08:19 PM, Tony Feldmann wrote:
>
>> I have been trying for a month or so to get a 2 node cluster up and
>> running.  I have engine installed on the first node, then add each each
>> system as a host to a posix dc.  Both boxes have 4 data disks.  After
>> adding the hosts I create a distributed replicate volume using 3 disk
>> from each host with ext4 filesystems. I click the 'optimize for virt'
>> option on the volume.  There is a message in events that says that it
>> can't set a volume option, then it sets 2 volume options.  Checking the
>> options tab I see that it added the gid/uid options.  I was unable to
>> find in the logs what option was not set, I just see a message about
>> usage for volume set  .  The volume starts fine and I
>> am able to create a data domain on the volume.  Once the domain is
>> created I try to create a vm and it fails creating the disk.  Error
>> messages are along the lines of task file exists and can't remove task
>> files.  There are directories under tasks and when trying to manually
>> remove them I get the "directory not empty" error.  Can someone please
>> shed some light on what I am doing wrong to get this 2 node cluster with
>> local disk as shared storage up and running?
>>
>>
> There are known problems with ext4 and gluster at the moment. Can you
> please confirm if you see similar behaviour with xfs and gluster?
>
> Thanks,
> Vijay
>
>
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Re: [Users] Issues using local storage for gluster shared volume

[Vijay Bellur]

On 03/28/2013 08:19 PM, Tony Feldmann wrote:

I have been trying for a month or so to get a 2 node cluster up and
running.  I have engine installed on the first node, then add each each
system as a host to a posix dc.  Both boxes have 4 data disks.  After
adding the hosts I create a distributed replicate volume using 3 disk
from each host with ext4 filesystems. I click the 'optimize for virt'
option on the volume.  There is a message in events that says that it
can't set a volume option, then it sets 2 volume options.  Checking the
options tab I see that it added the gid/uid options.  I was unable to
find in the logs what option was not set, I just see a message about
usage for volume set  .  The volume starts fine and I
am able to create a data domain on the volume.  Once the domain is
created I try to create a vm and it fails creating the disk.  Error
messages are along the lines of task file exists and can't remove task
files.  There are directories under tasks and when trying to manually
remove them I get the "directory not empty" error.  Can someone please
shed some light on what I am doing wrong to get this 2 node cluster with
local disk as shared storage up and running?



There are known problems with ext4 and gluster at the moment. Can you 
please confirm if you see similar behaviour with xfs and gluster?


Thanks,
Vijay

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Re: [Users] Issues using local storage for gluster shared volume

[Kanagaraj Mayilsamy]

- Original Message -
> From: "Tony Feldmann" 
> To: users@ovirt.org
> Sent: Thursday, March 28, 2013 8:19:17 PM
> Subject: [Users] Issues using local storage for gluster shared volume
> 
> 
> I have been trying for a month or so to get a 2 node cluster up and
> running. I have engine installed on the first node, then add each
> each system as a host to a posix dc. Both boxes have 4 data disks.
> After adding the hosts I create a distributed replicate volume using
> 3 disk from each host with ext4 filesystems. I click the 'optimize
> for virt' option on the volume. There is a message in events that
> says that it can't set a volume option, then it sets 2 volume
> options. Checking the options tab I see that it added the gid/uid
> options. I was unable to find in the logs what option was not set, I
> just see a message about usage for volume set  .

gid and uid options are enough to make a gluster volume ready for virt store. 
The third option sets a group(called as virt group) of options on the volume 
mainly related to performance tuning. To make this option work, you have to 
copy the file 
https://github.com/gluster/glusterfs/blob/master/extras/group-virt.example to 
/var/lib/glusterd/groups/ and name it as virt. Now you can click on 'Optimize 
for virt store' again to set the virt group. Setting this group option 
recommended but not necessary to make the gluster volume to be used as virt 
store.

I am not sure about the below errors, other people in the list can help you out.

Thanks,
Kanagaraj

> The volume starts fine and I am able to create a data domain on the
> volume. Once the domain is created I try to create a vm and it fails
> creating the disk. Error messages are along the lines of task file
> exists and can't remove task files. There are directories under
> tasks and when trying to manually remove them I get the "directory
> not empty" error. Can someone please shed some light on what I am
> doing wrong to get this 2 node cluster with local disk as shared
> storage up and running?
> 
> 
> Thanks,
> 
> 
> Tony
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[Users] Issues using local storage for gluster shared volume

[Tony Feldmann]

I have been trying for a month or so to get a 2 node cluster up and
running.  I have engine installed on the first node, then add each each
system as a host to a posix dc.  Both boxes have 4 data disks.  After
adding the hosts I create a distributed replicate volume using 3 disk from
each host with ext4 filesystems. I click the 'optimize for virt' option on
the volume.  There is a message in events that says that it can't set a
volume option, then it sets 2 volume options.  Checking the options tab I
see that it added the gid/uid options.  I was unable to find in the logs
what option was not set, I just see a message about usage for volume set
 .  The volume starts fine and I am able to create a data
domain on the volume.  Once the domain is created I try to create a vm and
it fails creating the disk.  Error messages are along the lines of task
file exists and can't remove task files.  There are directories under tasks
and when trying to manually remove them I get the "directory not empty"
error.  Can someone please shed some light on what I am doing wrong to get
this 2 node cluster with local disk as shared storage up and running?

Thanks,

Tony
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