Testing shows that creation of 5000 internal ports and using it
to do some meaningful tasks works fine on a 12 cpu hardware.
Since a single port needs one file descriptor and a bridge
needs 3 file descriptors, we will have to increase the file
descriptor limit to a higher number from the current limit of 5000.
7500 feels like a decent increase with enough room for further
scale testing.
Bug #18383.
Signed-off-by: Gurucharan Shetty <gshe...@nicira.com>
---
utilities/ovs-ctl.in | 8 ++++----
vswitchd/ovs-vswitchd.8.in | 2 +-
2 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/utilities/ovs-ctl.in b/utilities/ovs-ctl.in
index 6465fdf..0735160 100755
--- a/utilities/ovs-ctl.in
+++ b/utilities/ovs-ctl.in
@@ -224,10 +224,10 @@ start_forwarding () {
log_success_msg "ovs-vswitchd is already running"
else
# Increase the limit on the number of open file descriptors.
- # On Linux, ovs-vswitchd needs about one file descriptor per
- # switch port, so this allows a very large number of switch
- # ports.
- ulimit -n 5000
+ # On Linux, ovs-vswitchd needs about three file descriptors
+ # per bridge and one file descriptor per bridge port, so this
+ # allows a very large number of bridges and ports.
+ ulimit -n 7500
# Start ovs-vswitchd.
set ovs-vswitchd unix:"$DB_SOCK"
diff --git a/vswitchd/ovs-vswitchd.8.in b/vswitchd/ovs-vswitchd.8.in
index da43336..7d06918 100644
--- a/vswitchd/ovs-vswitchd.8.in
+++ b/vswitchd/ovs-vswitchd.8.in
@@ -237,7 +237,7 @@ We believe these limits to be accurate as of this writing.
These
limits assume the use of the Linux kernel datapath.
.
.IP \(bu
-\fBovs\-vswitchd\fR started through \fBovs\-ctl\fR(8) provides a limit of 5000
+\fBovs\-vswitchd\fR started through \fBovs\-ctl\fR(8) provides a limit of 7500
file descriptors. Creation of a single bridge consumes 3 file descriptors and
adding a port consumes 1 file descriptor. The limits on the number of bridges
and ports is decided by the availability of file descriptors. There is also a
--
1.7.9.5
_______________________________________________
dev mailing list
dev@openvswitch.org
http://openvswitch.org/mailman/listinfo/dev
