[Gluster-users] How understand some code execute client side or server side?

[Mohammed Rafi K C]

On 03/10/2017 10:47 AM, Tahereh Fattahi wrote:
> Thank you very much, it is very helpful.
> I see the client graph also in /var/log/glusterfs/mnt-glusterfs.log
> when mount the file system.

Yes, you are on the right place. Fuse mount process log's the graph if
the log level is INFO.

> I think there is a tree structure between xlator (I had seen something
> in code like child and parent of each xlator), so just some of them
> are the point of connecting to server. I think xlator with type
> protocol/client is responsible for send request and get response from
> server.

> am I correct?

Indeed, you are a quick learner. Translator with type protocol/client
will be the last node in the graph which connects to the protocol/server
loaded in server . protocol/server will be the starting node in server.


Regards
Rafi KC

>
> On Thu, Mar 9, 2017 at 8:38 PM, Mohammed Rafi K C <rkavunga at redhat.com
> <mailto:rkavunga at redhat.com>> wrote:
>
>     GlusterFS has mainly four daemons, ie glusterfs (generally client
>     process), glusterfsd (generally brick process), glusterd
>     (management daemon) and gluster (cli).
>
>     Except cli (cli/src) all of them are basically the same binary
>     symlinked to different name. So what makes them different is
>     graphs, ie each daemons loads a graph and based on the graph it
>     does it's job.
>
>
>     Nodes of each graph are called xlators. So to figure out what are
>     the xlators loaded in client side graph. You can see a client
>     graph
>     /var/lib/glusterd/vols/<volname>/trusted-<volname>.<protocol>-fuse.vol
>
>     Once you figured out the xlators in client graph and their type,
>     you can go to the source code, xlatos/<type>/<name>.
>
>
>     Please note that, if an xlator loaded on client graph it doesn't
>     mean that it will only run in client side. The same xlator can
>     also run in server if we load a graph with that xlator loaded.
>
>
>     Let me know if this is not helping you to understand
>
>
>     Regards
>
>     Rafi KC
>
>
>     So glusterd and cli codes are always ran on servers.
>
>     On 03/09/2017 08:28 PM, Tahereh Fattahi wrote:
>>     Hi
>>     Is there any way to understand that some code is running client
>>     side or server side (from source code and its directories)?
>>     Is it possible for some code to execute both client and server side?
>>
>>
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