[Gluster-devel] Adding one variable to inode structure

[Tahereh Fattahi]

Thank you very much
But if it was like trusted.glusterfs.dht or trusted.glusterfs.qouta it was
more better.

On Mon, Jun 5, 2017 at 2:58 PM, Pranith Kumar Karampuri <pkarampu at redhat.com
> wrote:

>
>
> On Mon, Jun 5, 2017 at 12:40 PM, Tahereh Fattahi <t28.fattahi at gmail.com>
> wrote:
>
>> yes you are correct.
>> I thought that for creating a video file i first should do a getfattr, if
>> it was not set then I should do a setxattr.
>> So it would be have bad performance to do a getfattr after every create,
>> for video files. Am I correct?
>>
>
> How consistent should it be? May be you can do this operation on another
> thread or something in the background so that your application may not see
> the delay in doing I/O?
>
>
>>
>> On Mon, Jun 5, 2017 at 11:28 AM, Pranith Kumar Karampuri <
>> pkarampu at redhat.com> wrote:
>>
>>> Oh you want applications to do getfattr to find that it is there?
>>>
>>> I think I understood what you are looking for now. So basically
>>> applications will keep doing creation of some files/directories, whenever a
>>> video file is created you want the bricks to set an extended attribute on
>>> the directory, so that the application can use it. I don't think this
>>> doesn't look like the job of index xlator either.
>>>
>>> Why do you not want to set the extended attribute from client and want
>>> the fs to do it on-behalf of the application? Setting it from client has
>>> benefits like even when one brick is down it will automatically heal this
>>> extended attribute etc.
>>>
>>> On Mon, Jun 5, 2017 at 12:10 PM, Tahereh Fattahi <t28.fattahi at gmail.com>
>>> wrote:
>>>
>>>> I want in in mount directory in client side
>>>>
>>>> On Mon, Jun 5, 2017 at 11:07 AM, Pranith Kumar Karampuri <
>>>> pkarampu at redhat.com> wrote:
>>>>
>>>>>
>>>>>
>>>>> On Mon, Jun 5, 2017 at 11:24 AM, Tahereh Fattahi <
>>>>> t28.fattahi at gmail.com> wrote:
>>>>>
>>>>>> Thank you
>>>>>> I see that this xlator is loaded in server side.
>>>>>> How can I access to variable in index xlator in client side?
>>>>>> is it correct? getfattr trusted.index.myvar
>>>>>>
>>>>>
>>>>> To which xlator do you want this information? Or do you want this on
>>>>> mount?
>>>>>
>>>>>
>>>>>>
>>>>>> On Mon, Jun 5, 2017 at 10:00 AM, Pranith Kumar Karampuri <
>>>>>> pkarampu at redhat.com> wrote:
>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On Mon, Jun 5, 2017 at 9:55 AM, Tahereh Fattahi <
>>>>>>> t28.fattahi at gmail.com> wrote:
>>>>>>>
>>>>>>>> Assume that one client wants to search it's directories for video
>>>>>>>> files.
>>>>>>>>  I want use something that helps this client to search just
>>>>>>>> directories that have this kind of file.
>>>>>>>> like a extended attribute, but I want this attribute be set by
>>>>>>>> server not by client.
>>>>>>>> I dont know which xlator is suitable for this work.
>>>>>>>>
>>>>>>>
>>>>>>> The xlator that comes close to it is:  index xlator
>>>>>>> xlators/features/index/src
>>>>>>>
>>>>>>> You may have to track extra operations like
>>>>>>> create/mknod/link/rename/unlink to make sure you get the
>>>>>>> functionality you want. Basically this xlator helps you in indexing a
>>>>>>> behavior. We use this for indexing directories/files that need heal etc.
>>>>>>>
>>>>>>>
>>>>>>>>
>>>>>>>> On Mon, Jun 5, 2017 at 7:13 AM, Pranith Kumar Karampuri <
>>>>>>>> pkarampu at redhat.com> wrote:
>>>>>>>>
>>>>>>>>> This sounds hacky. In general anything that is specific about an
>>>>>>>>> inode, we try to store it in inode-ctx. Who uses this information about
>>>>>>>>> presence of video-file and how? May be with that knowledge there could be a
>>>>>>>>> possibility we can improve the solution. Do let us know the complete
>>>>>>>>> problem you are trying to solve.
>>>>>>>>>
>>>>>>>>> On Mon, Jun 5, 2017 at 4:53 AM, Tahereh Fattahi <
>>>>>>>>> t28.fattahi at gmail.com> wrote:
>>>>>>>>>
>>>>>>>>>> Hi
>>>>>>>>>> I want to add one boolean field to inode structure for a
>>>>>>>>>> directory.
>>>>>>>>>>  when it is 1 it means that directory has one or more video file.
>>>>>>>>>> when it is 0 it means that there is no video file in that directory.
>>>>>>>>>> I can add this variable to inode structure and update it in
>>>>>>>>>> server side, in posix_create function (when there is a create request for a
>>>>>>>>>> video file).
>>>>>>>>>> question is about client knowledge about this variable. is it
>>>>>>>>>> possible that client can see the amount of this variable of different
>>>>>>>>>> servers (bricks) and OR them to one variable in cient's inode of the
>>>>>>>>>> directory? in which xlator I should try in client side?
>>>>>>>>>>
>>>>>>>>>> _______________________________________________
>>>>>>>>>> Gluster-devel mailing list
>>>>>>>>>> Gluster-devel at gluster.org
>>>>>>>>>> http://lists.gluster.org/mailman/listinfo/gluster-devel
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> Pranith
>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> Pranith
>>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Pranith
>>>>>
>>>>
>>>>
>>>
>>>
>>> --
>>> Pranith
>>>
>>
>>
>
>
> --
> Pranith
>
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