Re: libgfapi using unix domain sockets

Poornima Gurusiddaiah <pgurusid@xxxxxxxxxx> · Wed, 25 May 2016 02:09:12 -0400 (EDT)

Hi,

Whenever a new fd is created it is allocated from the mem-pool, if the mem pool is full it will be calloc'd. The current limit for fd-mem-pool is 1024, if there are more than 1024 fd's open, then the perf may be affected.
Also, the unix socket used while glfs_set_volfile_server() is only for Vol file, i.e. only for the connection btw Client and glusterd (management deamon). Hence, you may not see the IO performance increase, the patch http://review.gluster.org/#/c/12709/ introduces unix socket domain for IO path. This is what you may be interested in i guess.

Regards,
Poornima

From: "Ankireddypalle Reddy" <areddy@xxxxxxxxxxxxx>
To: gluster-users@xxxxxxxxxxx
Sent: Tuesday, May 24, 2016 9:16:31 PM
Subject: Re: [Gluster-users] libgfapi using unix domain sockets

Is there any suggested best practice for the number of glfs_fd_t  that can be associated with a glfs_t. Does having a single glfs_t in an application with large number of glfs_fd_t cause any resource contention issues.

Thanks and Regards,
Ram
From: gluster-users-bounces@xxxxxxxxxxx [mailto:gluster-users-bounces@xxxxxxxxxxx] On Behalf Of Ankireddypalle Reddy
 Sent: Tuesday, May 24, 2016 11:34 AM
 To: gluster-users@xxxxxxxxxxx
 Subject: Re:  libgfapi using unix domain sockets

I figured it out. 

Protocol: unix
Hostname: /var/run/glusterd.socket
Port: 0

Thanks and Regards,
Ram
From: gluster-users-bounces@xxxxxxxxxxx [mailto:gluster-users-bounces@xxxxxxxxxxx] On Behalf Of Ankireddypalle Reddy
 Sent: Tuesday, May 24, 2016 10:20 AM
 To: gluster-users@xxxxxxxxxxx
 Subject:  libgfapi using unix domain sockets

Hi,
        I am trying to use libgfapi for connecting to a gluster  volume using unix domain sockets. I am not able to find the socket path that should be provided while making the “glfs_set_volfile_server” function call.

ps -eaf | grep gluster
root     15178 31450  0 09:52 pts/1    00:00:00 grep --color=auto gluster
root     26739 26291  0 May16 ?        00:01:52 /opt/commvault/Base/IndexingService -serviceName IndexingService_cleanup -cn glustervm6 cvshost:glustervm6*glustervm6 cvsport:58600:0 cvsmyplatform:2 cvsremoteplatform:4 -vm Instance001
root     28335     1  0 May12 ?        00:02:15 /usr/sbin/glusterd -p /var/run/glusterd.pid --log-level INFO
root     30047     1  0 May12 ?        00:06:38 /usr/sbin/glusterfsd -s glustervm6sds --volfile-id StoragePool.glustervm6sds.ws-disk1-ws_brick -p /var/lib/glusterd/vols/StoragePool/run/glustervm6sds-ws-disk1-ws_brick.pid -S /var/run/gluster/9ed1d13b4265b95be4ed642578e7f28b.socket --brick-name /ws/disk1/ws_brick -l /var/log/glusterfs/bricks/ws-disk1-ws_brick.log --xlator-option *-posix.glusterd-uuid=3ab81d79-9a99-4822-abb2-62e76a029240 --brick-port 49152 --xlator-option StoragePool-server.listen-port=49152
root     30066     1  0 May12 ?        00:13:58 /usr/sbin/glusterfsd -s glustervm6sds --volfile-id StoragePool.glustervm6sds.ws-disk2-ws_brick -p /var/lib/glusterd/vols/StoragePool/run/glustervm6sds-ws-disk2-ws_brick.pid -S /var/run/gluster/be6fc96032a95d6bf00d41049ca0356a.socket --brick-name /ws/disk2/ws_brick -l /var/log/glusterfs/bricks/ws-disk2-ws_brick.log --xlator-option *-posix.glusterd-uuid=3ab81d79-9a99-4822-abb2-62e76a029240 --brick-port 49153 --xlator-option StoragePool-server.listen-port=49153
root     30088     1  0 May12 ?        00:00:21 /usr/sbin/glusterfs -s localhost --volfile-id gluster/nfs -p /var/lib/glusterd/nfs/run/nfs.pid -l /var/log/glusterfs/nfs.log -S /var/run/gluster/93db4047a97542a6457b2178ce6512d7.socket
root     30093     1  0 May12 ?        00:10:24 /usr/sbin/glusterfs -s localhost --volfile-id gluster/glustershd -p /var/lib/glusterd/glustershd/run/glustershd.pid -l /var/log/glusterfs/glustershd.log -S /var/run/gluster/3d435606821403370720761863000928.socket --xlator-option *replicate*.node-uuid=3ab81d79-9a99-4822-abb2-62e76a029240
root     30186     1  0 May12 ?        00:00:31 /usr/sbin/glusterfs --volfile-server=glustervm6sds --volfile-id=/StoragePool /ws/glus

Thanks and Regards,
Ram

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