Re: DHT xlator, read and write a file during creating a new file

[Tahereh Fattahi <t28.fattahi@xxxxxxxxx>]

Hi

I  test getfattr -d -m. -e hex ' <path > but i get different result:

getfattr: Removing leading '/' from absolute path names

# file: data/brick1/gv2/c

trusted.gfid=0xae8c02978686440dac3754880dde5b93

trusted.glusterfs.dht=0x000000010000000000000000ffffffff00000000

maybe it is  better to create a new question a bout detail of directory divided by brik!  

On Wed, May 3, 2017 at 4:15 PM, Tahereh Fattahi <t28.fattahi@xxxxxxxxx> wrote:

Yes, it is ok

Is it possible to see this attribute in client side? In which xlator?

On Wed, May 3, 2017 at 2:58 PM, Sanoj Unnikrishnan <sunnikri@xxxxxxxxxx> wrote:

I am not sure, if i got your requirement correctly.

If you need to have the file count and directory count of each brick individually (without aggregation), you could get that by a getxattr of trusted.glusterfs.quota.size on the brick.

The size xattr value can be interpreted as follows:
getfattr -d -m. -e hex ' <path >

size: first 16 bytes

filecount: Next 16 bytes

dircount: Last 16 bytes

Regards,

Sanoj

On Wed, May 3, 2017 at 12:20 PM, Tahereh Fattahi <t28.fattahi@xxxxxxxxx> wrote:

Thank you

I need this information divided to bricks.

On Tue, May 2, 2017 at 11:07 PM, Vijay Bellur <vbellur@xxxxxxxxxx> wrote:

On Tue, May 2, 2017 at 8:00 AM, Tahereh Fattahi <t28.fattahi@xxxxxxxxx> wrote:

Hi

I want to use a file as a counter when I create a file in dht xlator.

I mean, after creating a new file,  I want open a file in the same directory with a special name, read that, update the counter and write back. 

I think for this purpose I  should open in dht_create_cbk, read in dht_open_cbk and write in dht_readv_cbk.

I think I should use dht_open , dht_readv and dht_writev. Maybe I could create inputs for these function expect frame! is it correct to use the frame fro dht_create function?

Is this scenario correct or there is better way?

Have you tried the object count feature [1] ?

Regards,

Vijay

[1] http://gluster-documentations.readthedocs.io/en/latest/Features/quota-object-count/ 

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