similar to: Slow network

Is there a document with some guidelines for setting up bricks with tcp or rdma transport? I'm looking at a new deployment where the storage cluster hosts connect via 10GigE, but clients are on 1GigE. Over time, there will be 10GigE clients, but the majority will remain on 1GigE. In this setup, should the storage bricks use tcp or rdma? If tcp is the better choice, and at some point in the

Hi, I have a query regarding Lustre Throughput Numbers with mdtest benchmark.I am running mdtest benhmark with following options :- /home/meshram/mpich2-new/mpich2-1.4/mpich2-install/bin/mpirun -np 256 -hostfile ./hostfile ./mdtest -z 3 -b 10 -I 5 -v -d /tmp/l66 where , mdtest - is the standard benchmark to test metadata operations. [ https://computing.llnl.gov/?set=code&page=sio_downloads

Hi, I have a query regarding Lustre Throughput Numbers with mdtest benchmark.I am running mdtest benhmark with following options :- /home/meshram/mpich2-new/mpich2-1.4/mpich2-install/bin/mpirun -np 256 -hostfile ./hostfile ./mdtest -z 3 -b 10 -I 5 -v -d /tmp/l66 where , mdtest - is the standard benchmark to test metadata operations. [ https://computing.llnl.gov/?set=code&page=sio_downloads

I've got a pair of identical CentOS 6.7 servers, with SuperMicro X8DTE-F motherboards, these have 2 each Intel 82574L ethernet ports. The eth0 ports are plugged in with 10' runs of brand new cat 5e cable to a Cisco Nexxus 9000 switch (provided by the data center). These servers keep coming up at 100baseT rather than gigE. I've swapped ports and cables with a different server,

On 10/10/2016 09:31 PM, John R Pierce wrote: > > oh. Yeah, the entire "net-tools" package is deprecated. I tend to forget which of the two (ethtool or mii-tool) is in that set. # Avoid using any of these: $ rpm -ql net-tools

Hi there, When Lustre is configured in an environment where there are multiple paths to the same destination of the same length (i.e. two paths, each one hop away), which path(s) will be used for sending and receiving data? I have my cluster configured with two OSTs with two GigE NICs in each. I am seeing identical performance metrics when I use LACP to aggregate, and when I use two separate

I have a beefy machine (Intel dual-quad core, 16GB memory 2 x GigE) I have loaded RHEL5.1-xen on the hardware and have created two logical systems: 4 cpus, 7.5 GB memory 1 x Gige Following RHEL guidelines, I have it set up so that eth0->xenbr0 and eth1->xenbr1 Each of the two RHEL5.1 guests uses one of the interfaces and this is verified at the switch by seeing the unique MAC addresses.

On Fri, 20 Feb 2015 13:05:56 -0700, Harry McGregor wrote: > For a very basic setup it would work, but I would suggest POE at a > minimum, and vlan support if possible. > > Gigabit uplinks, 10/100 for the poe ports > > http://www.amazon.com/NETGEAR-ProSAFE-M4100-D10-POE-Ethernet-Managed/dp/ B00AUEYX0Y/ref=sr_1_3?ie=UTF8&qid=1424462577&sr=8-3&keywords=netgear+poe

Yes, I get more than 30MB/s performance. The benchmark I use (NetBench) is essentially CPU bound, such that a faster processor = faster performance. With a very fast hardware config (dual 3.2GHz processors), I've been able to hit around 100MB/s. Changing the RAM or other attributes does not buy me much, it seems that processor power is the bottleneck (at least in my case). When doing your

I have a samba server with 2 ethernet ports, one of which is a gigabit port. When connecting from a windows client that has a crossover to the gigabit port, and a crossover to the 100Meg port: If I connect via \\gige.ethernet.address\foo , and copying a large file, windows reports outbound traffic on the gige port and return traffic on the 100Meg port. Thus, it seems the samba server sees the

Folks, I realize this is off topic, and if anyone can suggest a better source for the question, I'd be glad to go there. Novell SUSE's support is unresponsive, however. My problem is this: I'm running 9.3 Pro on an Intel server board that has two NIC chips built in (a 10/100 and a GigE). I've since added a Netgear GigE NIC. However, every time I reboot, the NICs assigned to

Hi folks :-) situation: debian stable (samba version 2:3.2.5-4lenny9) from clients by ftp the transfer of huge file is about 10/11Mb/s (with an ethernet 10/100) by samba came 5/6Mb/s is it correct? In smb.conf I don't have any "strange"options: thanks Pol domain master = yes preferred master = yes os level = 65 workgroup = WORKGROUP netbios name = name Server String = name

Hi, I'm a happy Samba user. I've been working sucessfully in Linux for the past 6 months. I've built a Linux Server with very fast storage and I'm connecting it to many Windows XP "video editing workstations" via Gigabit Ethernet (all NICs using Jumbo Frames, by the way). Now I want to see if I can increase my data flow in and out of the Server so that more

I'm running a server recently installed with centos 4.2. It's running the kernel in the subject line, on an PIII 866Mhz with 512mb ram. The system is running basically two processes: 1) ssh to remote system, receiving a stream of bytes piped into 2) gzip the stream, write to disk file The system is slow, relatively (866Mhz cpu) and the network is fast (gigabit) so the limiting factor

Jonathan Billings wrote: <snip> >> And *why* random NIC names? Quick, you've got servers from 5 >> manufacturers, of different ages... what's the NIC going to be called? >> Do names like enp5s0 offer any convenience to *anyone* not a hardware >> engineer? > > Unrelated to systemd. This actually started happening in RHEL6 with > the biosdevname

Folks, I'm trying to add a network interface card to my SUSE 9.3 box, and I'm not having much luck with a US Robotics version. What manufacturer do any of you use in your machines--either 10/100MB or GigE NIC? Thanks Eric Hines There is no nonsense so errant that it cannot be made the creed of the vast majority by adequate governmental action. --Bertrand Russell

Folks The price point of Intel's NUC unit makes it attractive to use as a server that doesn't have significant computational load. In my environment, a USB connected hard-drive could provide all the storage needed. I wonder if anyone has had experience with it, and can answer: 1) Does Centos6 and/or Centos7 install from a USB connected optical drive? or a USB flash drive? I'd

Hi! I want to upgrade hardware on my router (iptables, htb, >1000 users). Now it is based on usual desktop PC (Intel Prescott P4 3.00 Ghz, 1 Gb RAM). The reason of hardware upgrade is growing up number of users, also we are planning to increase upstream link from 100 Mbit/s to 1 Gbit/s. Iptables rules are now optimized with ipset tool, for tc I''m using hash tables as well. So I

Hello, Working a few servers that are transferring data across country with a 75ms delay on a GIGE connection. We can tune the tcp buffers on linux to improve the connections using iperf. Does rsync use the tcp buffers of the OS or does it override these settings? Thanks, Neal -------------- next part -------------- An HTML attachment was scrubbed... URL:

GigE wasn''t giving me the performance I had hoped for so I spring for some 10Gbe cards. So what am I doing wrong. My setup is a Dell 2950 without a raid controller, just a SAS6 card. The setup is as such : mirror rpool (boot) SAS 10K raidz SSD 467 GB on 3 Samsung 256 MLC SSD (220MB/s each) to create the raidz I did a simple zpool create raidz SSD c1xxxxx c1xxxxxx c1xxxxx. I have