[Gluster-devel] DHT xlator, read and write a file during creating a new file

Amar Tumballi atumball at redhat.com
Tue May 2 12:36:54 UTC 2017

On Tue, May 2, 2017 at 5:30 PM, Tahereh Fattahi <t28.fattahi at gmail.com>

> 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?
> This is correct. But very in-efficient (for so many different fops for one
fop from user). See if you can keep another extended attribute itself which
you can update. That way, you can just handle the counter management using
'xattrop' or `setxattr()' fops


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Amar Tumballi (amarts)
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