[Gluster-users] Sparse Files and Heal

[Adrian Kan]

Thanks a lot!  Just one more question.
I know the file sizes are different.  However, I run a md5sum against the
original and the one after reheal (with smaller file size), they are the
same.
I would like to know if there is any side-effect to keep them in different
file sizes on different bricks until the bug has been fixed?

Fortunately, I mount the healed VM image (the one with smaller file size)
using losetup,kpartx,etc, I can still see the files in the VM file system.


Thanks,
Adrian

-----Original Message-----
From: Pranith Kumar Karampuri [mailto:pkarampu at redhat.com] 
Sent: Sunday, November 23, 2014 12:22 AM
To: Adrian Kan; 'Lindsay Mathieson'; gluster-users at gluster.org
Subject: Re: [Gluster-users] Sparse Files and Heal


On 11/22/2014 09:46 PM, Adrian Kan wrote:
> I would like to have 3.4.x fixed if possible.  I have a plan to 
> upgrade, but have to review the procedure such as:
Okay, done, https://bugzilla.redhat.com/show_bug.cgi?id=1167012
> 1) the sequence - upgrade the client first or the brick first?
> 2) can one brick taken down for upgrade and bring it back up to have 
> everything in sync between 3.4.x and 3.5.x before I upgrade the next 
> brick to 3.5.x?
This fix will be in client. So you will anyway have downtime. So do a normal
upgrade by stopping the VMs, unmount the mounts, stop the volume. 
Upgrade both clients, servers. Start volume and remount, start the vms
again.

Pranith
>
>
> Thanks,
> Adrian
>
> -----Original Message-----
> From: Pranith Kumar Karampuri [mailto:pkarampu at redhat.com]
> Sent: Sunday, November 23, 2014 12:11 AM
> To: Adrian Kan; 'Lindsay Mathieson'; gluster-users at gluster.org
> Subject: Re: [Gluster-users] Sparse Files and Heal
>
>
> On 11/22/2014 09:31 PM, Adrian Kan wrote:
>> I'm currently using 3.4.2
> Do you mind upgrading to 3.5.x or want to stay with 3.4.x?
>
> Pranith
>>
>> Thanks,
>> Adrian
>>
>> -----Original Message-----
>> From: Pranith Kumar Karampuri [mailto:pkarampu at redhat.com]
>> Sent: Saturday, November 22, 2014 11:57 PM
>> To: Adrian Kan; 'Lindsay Mathieson'; gluster-users at gluster.org
>> Subject: Re: [Gluster-users] Sparse Files and Heal
>>
>>
>> On 11/22/2014 09:25 PM, Adrian Kan wrote:
>>> Thanks a lot Pranith.  Could you CC me the bug as well because I am 
>>> very interested in the status.
>>> I'm getting the same issue since the middle of this year 
>>> (http://gluster.org/pipermail/gluster-users.old/2014-March/016322.ht
>>> m
>>> l
>>> ) so I hope this can be fixed.
>> Are you using 3.4.x or 3.5.x? There will be different bugs(clones) 
>> for the two releases. Based on that I will CC
>>
>> Pranith
>>> Thanks,
>>> Adrian
>>>
>>> -----Original Message-----
>>> From: Pranith Kumar Karampuri [mailto:pkarampu at redhat.com]
>>> Sent: Saturday, November 22, 2014 11:49 PM
>>> To: Adrian Kan; 'Lindsay Mathieson'; gluster-users at gluster.org
>>> Subject: Re: [Gluster-users] Sparse Files and Heal
>>>
>>>
>>> On 11/22/2014 01:17 PM, Adrian Kan wrote:
>>>> Pranith,
>>>>
>>>> I'm wondering if this is a better method to take down a brick for 
>>>> maintenance purpose and reheal:
>>>>
>>>> 1) Detach the brick from the cluster - gluster volume remove-brick
>>>> datastore1 replica 1 brick1:/mnt/datastore1
>>>> 2) Take down the brick1
>>>> 3) Do whatever maintenance needed to brick1
>>>> 4) Turn the brick1 back on
>>>> 5) I'm pretty sure glusterfs would not allow brick1 to be 
>>>> re-attached to the cluster because there are attributes set in the 
>>>> volume.  The only way is to remove everything in it.
>>>> 6) Re-attach brick1 after emptying the directory in brick1 - 
>>>> gluster volume add-brick datastore1 replica brick1:/mnt/datastore1
>>>> 7) Initiate full heal
>>> Best method is just 2), 3), 4). The only bug that is preventing that 
>>> from happening now is 'full' heal filling sparse regions of the 
>>> file, which will be fixed shortly, we even identified the fix.
>>>
>>> Pranith
>>>> Thanks,
>>>> Adrian
>>>>
>>>> -----Original Message-----
>>>> From: gluster-users-bounces at gluster.org 
>>>> [mailto:gluster-users-bounces at gluster.org] On Behalf Of Lindsay 
>>>> Mathieson
>>>> Sent: Saturday, November 22, 2014 3:35 PM
>>>> To: gluster-users at gluster.org
>>>> Subject: Re: [Gluster-users] Sparse Files and Heal
>>>>
>>>> On Sat, 22 Nov 2014 12:54:48 PM you wrote:
>>>>> Lindsay,
>>>>>           You said, you restored it from some backup. How did you 
>>>>> do
> that?
>>>>> If you copy the VM image from back up to the location where you 
>>>>> deleted it from on the brick directly. Then the VM hypervisor 
>>>>> still doesn't write to the new file that is copied. Basically we 
>>>>> need to make the mount close old fd that was opened on the VM(now 
>>>>> deleted on one
>>>> of the bricks).
>>>>
>>>>
>>>> I stopped the the VM and the restore creates an image with a new 
>>>> name, so it should be fine.
>>>>
>>>> thanks,
>>>> --
>>>> Lindsay
>>>>
>>>> _______________________________________________
>>>> Gluster-users mailing list
>>>> Gluster-users at gluster.org
>>>> http://supercolony.gluster.org/mailman/listinfo/gluster-users