Amador Pahim has uploaded a new change for review.
Change subject: [RFC] Sysctl to allow iSCSI multipath with multiple NICs in the
same subnet
......................................................................
[RFC] Sysctl to allow iSCSI multipath with multiple NICs in the same subnet
When two or more interfaces are in the same subnet, the default OS
behaviour won't allow the independent traffic between local NICs and
iSCSI targets.
These sysctl tweaks are needed to have iSCSI multipath working in such
topology:
eth1 (192.168.25.200) --|
|-- iSCSI Target (192.168.25.10)
eth2 (192.168.25.201) --|
The proposed changes are reccomended by the storage vendor and are described
in documents bellow:
-
http://en.community.dell.com/dell-groups/dtcmedia/m/mediagallery/20371245/download.aspx
- https://support.equallogic.com/WorkArea/DownloadAsset.aspx?id=8727
Change-Id: Ibf93d49317c76aece764e53e58e0ff28868f16b0
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1112861
Signed-off-by: Amador Pahim <apa...@redhat.com>
---
M vdsm/vdsm-sysctl.conf
1 file changed, 11 insertions(+), 0 deletions(-)
git pull ssh://gerrit.ovirt.org:29418/vdsm refs/changes/29/31529/1
diff --git a/vdsm/vdsm-sysctl.conf b/vdsm/vdsm-sysctl.conf
index ecd1386..332379c 100644
--- a/vdsm/vdsm-sysctl.conf
+++ b/vdsm/vdsm-sysctl.conf
@@ -1,3 +1,14 @@
#Set dirty page parameters
vm.dirty_ratio = 5
vm.dirty_background_ratio = 2
+
+#Set ARP to avoid RST when interfaces are in the same subnet.
+net.ipv4.conf.all.arp_ignore = 1
+net.ipv4.conf.all.arp_announce = 2
+
+#Set rp_filter to "loose mode" allowing multiple iSCSI connections in
+#a multiple NIC per subnet configuration.
+net.ipv4.conf.all.rp_filter = 2
+
+#Workaround for netfilter issue marking packets as invalid under heavy load.
+net.netfilter.nf_conntrack_tcp_be_liberal = 1
--
To view, visit http://gerrit.ovirt.org/31529
To unsubscribe, visit http://gerrit.ovirt.org/settings
Gerrit-MessageType: newchange
Gerrit-Change-Id: Ibf93d49317c76aece764e53e58e0ff28868f16b0
Gerrit-PatchSet: 1
Gerrit-Project: vdsm
Gerrit-Branch: master
Gerrit-Owner: Amador Pahim <apa...@redhat.com>
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