Isaac,
Thanks for the reply. In our setup in cases where we could have
multiple lustre file systems (with IB, 10Gig et. al) i don't want to
waste one (switch port, IB HCA) for the MGS node as there would not
be a lot of traffic for MGS, so I am planning to use just a regular
GigE network for the MGS even for the cases where we would have IB on
the OSS and compute nodes.
So I would run MGS on the regular GigE network which would provide
the config information to all the OSS/MDS and clients irrespective of
the network that these clients would use for the IO.
Thanks
Anand
On Oct 17, 2007, at 10:01 AM, Isaac Huang wrote:
Hi,
AFAIK, UDP is not used in LNet, the Lustre networking sub-system. TCP
port usage depends on the LNDs (Lustre Network Driver) you're using.
For LNDs that rely on LNet acceptor to establish connections (ciblnd,
openiblnd, ralnd, and socklnd), the acceptor port must be open.
Acceptor port can be configured via lnet module parameter
"accept_port",
which defaults to 988.
The o2iblnd creates connections via OFED RDMA CM API, which
requires no
TCP/UDP port to work despite the fact that it utilises IP addresses.
The viblnd should also fail into this category.
Hope this helps,
Isaac
On Mon, Oct 15, 2007 at 12:00:32PM -0700, Anand Bisen wrote:
Hi,
I would like to know what TCP/UDP ports should i keep open in my
firewall policies on my MGS server such that I can have my MGS server
fire-walled. Also if in a event of loss of MGT would it be possible
to recreate the MGT without loosing data or bringing the filesystem
down (i.e. by using cached information from MDT's and OST's)
Thanks
Anand
---
Anand Bisen
Sr. Systems Architect, DataDirect Networks
9351 Deering Avenue, Chatsworth, CA 91311
Tel: 818-700-4053 Fax: 818-700-7665
Cell: 818-723-9752
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