Re: [CentOS] Bonded interfaces - testing
In which case, an appropriate test would be to have several servers push data to one the server while it's interface is un-bonded. We'd anticipate that the results would be under 1000Mbps. Then do the same with the bonded interface and the results would hopefully be more consistently around 1000Mpbs. So I should not expect fastest throughput, simply a fatter pipe? If it matters these are the hashing options available on the switch: Thanks, Dermot Src MAC, VLAN, EType, incoming port Dest MAC, VLAN, EType, incoming port Src/Dest MAC, VLAN, EType, incoming port Src IP and Src TCP/UDP Port fields Dest IP and Dest TCP/UDP Port fields Src/Dest IP and TCP/UDP Port fields Enhanced hashing mode On 25 March 2013 14:56, James Hogarth wrote: > > Does anyone have any thoughts? I pasted some details below increase they > > have a bearing. > > > > > Remember that LACP (802.3ad) uses a hash algorithm (configurable on how > it's carried out and whether you use mac addresses, dst/src IPs and ports > will vary quite often for optimisation) to pick a physical connection for > the TCP flow ... and that will stay over the physical connection. > > As such for any one given flow you'll see up to the speed of the physical > interface the data is going over... the speed increases come with multiple > systems communicating with that server and with the right pick of hashing > function having those connections go over differing interfaces. > ___ > CentOS mailing list > CentOS@centos.org > http://lists.centos.org/mailman/listinfo/centos > ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Bonded interfaces - testing
Hi, I have 2 servers running CentOS 6.3. Each has four 1gb Ethernet ports. I have bonded all four ports on each server and patched them to the same switch (following the instructions at http://wiki.centos.org/TipsAndTricks/BondingInterfaces). I have created aggregated trunks for the servers respective ports on the switch. The switch reports that the ports are up and that the Link Aggregation is enabled. I was under the impression, perhaps falsely, that I would see an improvement in the throughput. I am not sure that I am. I used a utility call nuttcp before the trunking and after to test the throughput. I am seeing miniscule differences in the Mbps. I am not sure that I am testing correctly. Perhaps the speed will not change but the available bandwidth has increased. Is there some way to demonstrate that I am able to transfer data from these two servers at a rate of 4,000Mbs? Does anyone have any thoughts? I pasted some details below increase they have a bearing. Thanks in advance Dermot. ./nuttcp otherserver 1125.6573 MB / 10.03 sec = 941.4967 Mbps 10 %TX 47 %RX cat /proc/net/bonding/bond0 Ethernet Channel Bonding Driver: v3.6.0 (September 26, 2009) Bonding Mode: IEEE 802.3ad Dynamic link aggregation Transmit Hash Policy: layer2 (0) MII Status: up MII Polling Interval (ms): 100 Up Delay (ms): 0 Down Delay (ms): 0 802.3ad info LACP rate: slow Aggregator selection policy (ad_select): stable Active Aggregator Info: Aggregator ID: 2 Number of ports: 4 Actor Key: 17 Partner Key: 420 Partner Mac Address: 10:0d:7f:4c:16:ca Slave Interface: eth0 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 2c:76:8a:5d:28:1c Aggregator ID: 2 Slave queue ID: 0 Slave Interface: eth1 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 2c:76:8a:5d:28:1d Aggregator ID: 2 Slave queue ID: 0 Slave Interface: eth2 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 2c:76:8a:5d:28:1e Aggregator ID: 2 Slave queue ID: 0 Slave Interface: eth3 MII Status: up Speed: 1000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 2c:76:8a:5d:28:1f Aggregator ID: 2 Slave queue ID: 0 ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
Re: [CentOS] HP Hardware
2008/9/14 nate <[EMAIL PROTECTED]>: > Mag Gam wrote: >> At my university we use HP hardware exclusively. When we build CentOS >> our Unix SA is running several HP utilities. I am wondering what some >> of these utilities are, such as cmaidad. Is it possible to to use >> these HP utilities to monitor for disk crashes (similar to smartd)? Is >> anyone using native HP utilities for this purpose? > I just did a round of HP patches to my DL series servers. In doing so I went to the HP site and installed the Support Pack RPMs. This provide a load of tool including the Compaq RAID utility (cqpacuex). However these tools run as daemons so if you want a small footprint, this might not be the way for you. The tools do provide a web-based dignostics utility which also allows you to configure the host array or in my case, the fibre attached storage arrays. In the past I have had to change the name in the /etc/*release file to RedHat to install HP stuff. I can't remember if I had to do that this time! Dp. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Re: Illegal opp code
2008/9/12 Dermot : > HP DL 385 G2. > CentOS 5.1 > Kernel 2.6.18-92.1.10.el5 > > I have a newly installed server that was running x. It told me there > were updates to install. I accepted that all, except sysreport as I > always seem to have problems installing. I rebooted, having set the > default run level to 3. I then got a red screen with an "illegal > OpCode" error message. > > I have used my CD to boot into rescue more. My old system is mounted under > /mnt. > > I would also like to get my system back up and running. I have put a > fair bit of time into loading libraries and software. > > I have tried editing the grub.conf and commenting out the > 2.6.18-92.1.10.el5 kernel so it used a previous kernel but I can not > get past this error. There is no message from grub. The system comes > straight from the BIOS messages into this red screen. > > Is there any other ways to determine what the problem is? The error > messages says nothing more that a few lines of hex which don't look > useful to me. This turned out to be an grub issue. The illegal OpCode message seems to come the HP hardware/BIOS. I resolved it by booting using an CentOS cd, doing linux rescue at boot. >chroot /mnt/sysimage >grub grub> device (hd0) /dev/csiss/c0d0 grub> root (hd0,0) grub> setup (hd0) It took a couple of attempts, my knowledge of grub is limited. During the process I also booted from a DOS floppy and did a fdisk /mbr. That removed the Illegal OpCode which confirmed I was on the right route. Hopefully this post might help some other poor HP harware user. Dp. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
[CentOS] Illegal opp code
Hi, HP DL 385 G2. CentOS 5.1 Kernel 2.6.18-92.1.10.el5 I have a newly installed server that was running x. It told me there were updates to install. I accepted that all, except sysreport as I always seem to have problems installing. I rebooted, having set the default run level to 3. I then got a red screen with an "illegal OpCode" error message. I have used my CD to boot into rescue more. My old system is mounted under /mnt. I would also like to get my system back up and running. I have put a fair bit of time into loading libraries and software. I have tried editing the grub.conf and commenting out the 2.6.18-92.1.10.el5 kernel so it used a previous kernel but I can not get past this error. There is no message from grub. The system comes straight from the BIOS messages into this red screen. Is there any other ways to determine what the problem is? The error messages says nothing more that a few lines of hex which don't look useful to me. Any thoughts would be appreciated. TIA. Dp. ___ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
