Lustre 1.6 Operations Manual

31.2.8 Portals LND (Catamount)
The Portals LND Catamount (ptllnd) can be used as a interface layer to communicate
with Sandia Portals networking devices. This version is intended to work on the
Cray XT3 Catamount nodes using Cray Portals as a network transport.
To enable the building of the Portals LND configure with this option:
./configure --with-portals=
The following PTLLND tunables are currently available:
Variable
PTLLND_DEBUG
(boolean, dflt 0)
PTLLND_TX_HISTO
RY
(int, dflt
debug?1024:0)
PTLLND_ABORT_O
N_PROTOCOL_MIS
MATCH
(boolean, dflt 1)
PTLLND_ABORT_O
N_NAK
(boolean, dflt 0)
PTLLND_DUMP_ON
_NAK
(boolean, dflt
debug?1:0)
PTLLND_WATCHDO
G_INTERVAL
(int, dflt 1)
PTLLND_TIMEOUT
(int, dflt 50)
PTLLND_LONG_WA
IT
(int, dflt
debug?5:PTLLND_TI
MEOUT)
Description
Enables or disables debug features.
Sets the size of the history buffer.
Calls abort action on connecting to a peer running a different
version of the ptllnd protocol.
Calls abort action when a peer sends a NAK. (Example: When it
has timed out this node.)
Dumps peer debug and the history on receiving a NAK.
Sets intervals to check some peers for timed out communications
while the application blocks for communications to complete.
The communications timeout (in seconds).
The time (in seconds) after which the ptllnd prints a warning if it
blocks for a longer time during connection establishment, cleanup
after an error, or cleanup during shutdown.
31-18 Lustre 1.6 Operations Manual • September 2008