Olaf Kirch wrote:
Hi Tziporet,
On Monday 18 February 2008 14:53, Tziporet Koren wrote:
rds_release_notes.txt - Olaf
RDS_README.txt - Olaf
I'm attaching a patch for RDS_README, which replaces it with
a newer copy of the manpage. The manpage will also go into
rds-tools, I hope.
Olaf
You forgot the attachment, but Vlad gave it to me from the man page
What about update for the release notes?
I attach them here for your convenience
Tziporet
Open Fabrics Enterprise Distribution (OFED)
RDS in OFED 1.3 Release Notes
February 2008
===============================================================================
Table of Contents
===============================================================================
1. Overview
2. Supported Platforms
3. Installation & Configuration
4. New Features
5. Bug fixes and Enhancements since OFED 1.2
===============================================================================
1. Overview
===============================================================================
RDS socket API. It provides reliable, in-order datagram delivery between
sockets over a variety of transports.
For details see RDS.README.txt.
Also available at:
http://oss.oracle.com/projects/rds/dist/documentation/rds.7.txt
===============================================================================
2. supported platforms
===============================================================================
RHEL4.0 Update 3,4,5
RHEL5.0
SLES 10
===============================================================================
3. Installation & Configuration
===============================================================================
To install RDS select rds in OFED's manual installation or put 'rds=y' in the
ofed.conf for unattended installation.
To load RDS module upon boot edit file '/etc/infiniband/openib.conf' as
follows:
# Load RDS module
RDS_LOAD=yes
===============================================================================
4. New Features
===============================================================================
RDS socket send buffers are now per socket, not per flow, and the new receive
buffer value is per socket. So we should use the core stack sndbuf and rcvbuf
values instead of offering a separate interface.
Use the following script to change the default and max socket buffer sysctls
to a 1 MB:
#!/bin/bash
nr=$((1 * 1024 * 1024))
sys="/proc/sys/net/core"
for f in {r,w}mem_{default,max}; do
echo $nr > $sys/$f
done
===============================================================================
5. Bug fixes and Enhancements since OFED 1.2
===============================================================================
1. rds_poll() always returns POLLOUT. If you try to send and get
EWOULDBLOCK because the remote receiver is congested then you don't get
to wait for POLLOUT to be raised before sending again -- it's always
raised. This is worked around by implementing some kind of exponential
back-off while retrying the send. This can be done by increasing the
timeout given to poll(). At each poll() timeout expiry the send is
tried again.
This idea of waking poll() waiters on congestion notification hopes to
cut down on the latency between when the send could succeed and when the
poll() timeout hits and the send is retried. If we receive a congestion
bitmap update from the remote node we wake poll() waiters, giving them a
chance to retry their send.
2. Set max send and receive scatter/gather list size to 2 in the QP attributes.
The second sge used for RDS header.
3. Added rs_poll_flag to rds_socket structure to indicate the back pressure
status and send space availability.
rds_poll set POLLIN in case of released back pressure, send space became
available and if there are messages in the receive queue.
set POLLOUT if send buffer is available
4. Added MODULE_VERSION.
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