glusterfs.git/tests/basic/multiplex.t, branch v3.11.3

trash: fix problem with trash feature under multiplexing

2017-02-09T13:46:45+00:00

With multiplexing, the trash translator gets a reconfigure call before
a notify(CHILD_UP).  In this case, priv->trash_itable was not yet
initialized, so the reconfigure would get a SEGV.  Moving the itable
allocation to init seems to fix it, so trash can be reenabled.

Change-Id: I21ac2d7fc66bac1bc4ec70fbc8bae306d73ac565
BUG: 1420434
Signed-off-by: Jeff Darcy 
Reviewed-on: https://review.gluster.org/16567
Smoke: Gluster Build System 
NetBSD-regression: NetBSD Build System 
CentOS-regression: Gluster Build System 
Reviewed-by: Anoop C S 
Reviewed-by: jiffin tony Thottan 
Reviewed-by: Shyamsundar Ranganathan

tests: fix online_brick_count for multiplexing

2017-02-08T03:22:19+00:00

The number of brick processes no longer matches the number of bricks,
therefore counting processes doesn't work.  Counting *pidfiles* does.
Ironically, the fix broke multiplex.t which used this function, so it
now uses a different function with the old process-counting behavior.
Also had to fix online_brick_count and kill_node in cluster.rc to be
consistent with the new reality.

Change-Id: I4e81a6633b93227e10604f53e18a0b802c75cbcc
BUG: 1385758
Signed-off-by: Jeff Darcy 
Reviewed-on: https://review.gluster.org/16527
NetBSD-regression: NetBSD Build System 
CentOS-regression: Gluster Build System 
Smoke: Gluster Build System 
Reviewed-by: Vijay Bellur

core: run many bricks within one glusterfsd process

2017-01-31T00:13:58+00:00

This patch adds support for multiple brick translator stacks running
in a single brick server process.  This reduces our per-brick memory usage by
approximately 3x, and our appetite for TCP ports even more.  It also creates
potential to avoid process/thread thrashing, and to improve QoS by scheduling
more carefully across the bricks, but realizing that potential will require
further work.

Multiplexing is controlled by the "cluster.brick-multiplex" global option.  By
default it's off, and bricks are started in separate processes as before.  If
multiplexing is enabled, then *compatible* bricks (mostly those with the same
transport options) will be started in the same process.

Change-Id: I45059454e51d6f4cbb29a4953359c09a408695cb
BUG: 1385758
Signed-off-by: Jeff Darcy 
Reviewed-on: https://review.gluster.org/14763
Smoke: Gluster Build System 
NetBSD-regression: NetBSD Build System 
CentOS-regression: Gluster Build System 
Reviewed-by: Vijay Bellur