3rd-party drives with R510 PERC H700i
Hi, I'm looking at purchasing a Dell PowerEdge R710. Will the PERC H700i on the R710i reject 3rd-party disk drives? Thanks, Jason ___ Linux-PowerEdge mailing list Linux-PowerEdge@dell.com https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq
Re: to access 4 Virtual Hosts from a public IP
Tapas Mishra wrote: On Sat, Apr 10, 2010 at 10:50 PM, Jason Edgecombe ja...@rampaginggeek.com wrote: ok, I'm a little confused. Please confirm that I understand this correctly. You have 6 hosts: Right two physical machines: A( xenhost dom0) B (non-xen) Right four xen domU's: a,b,c,d Right You have two physical networks: Net1 (public internet), and Net2 (private net) Yes 2 networks Xen host A is connected to both Net1 and Net2. Yes on same interface. Host A has a xen bridged Yes now this is the problem wether bridge is running on it or not I am not sure although brctl show gives an out put bridge name eth2 but I am using xen 3.2 and in xen 3.3 and onwards the default name of bridge is same as the ethernet card. network with Net2, so that a, b, c, and d are all bridged to Net2. Host B is Net2. Is this correct? Yes Ok by the time you replied I had figured out see if it is right. Dom0 is acting as a router here as this page says dom0 from acting as an IP router: echo 0 /proc/sys/net/ipv4/ip_forward. So the way I explained ssh is working from behind. Now the thing is I want to go to setup IPTABLES and NAT on Dom0 for the virtual hosts. I am very well aware of IPTABLES but Xen Dom0 is confusing me. I want these virtual hosts to be able to connect to internet as I run apt-get or commands so I will be creating a squid proxy on Dom0 for DomU's to be behind Dom0 is it possible if yes if you can provide me some link that may help me a bit. Xen network wiki page talks some thing about ebtables. http://ebtables.sourceforge.net/br_fw_ia/br_fw_ia.html Now here is I am confused at ebtables and iptables. You shouldn't need to use ebtables. Iptables should work. For your situation, you will need echo 1 /proc/sys/net/ipv4/ip_forward you should be able to to set up a bridge, but use the private NIC instead of the public NIC on dom0., then just follow a NAT tutorial. Leave the ssh forwarding and apache proxy until last. Jason ___ Linux-PowerEdge mailing list Linux-PowerEdge@dell.com https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq
Re: RAID-5 and database servers
John G. Heim wrote: From: Jefferson Ogata powere...@antibozo.net *Again*, this is why if you have particular performance requirements, you should consult with your database vendor to determine what bandwidth and IOPS you need, and benchmark your gear using different RAID configs. You may find that RAID 5 is just fine performance-wise, and you can get around 1.7 times the storage capacity with the same rack space, heat, and power load over RAID 10. Asking here you're just going to get people parroting Oracle's stale recommendations and speculating wildly without knowing anything about your workload. Well, its not really practical to suggest that I consult with my vendor. My whole budget is $6000. This is just the Math Department at the University of Wisconsin. I mentioned in my original message that our databases consist primarily of spamassassin bayesian rules and horde3/imp web mail. Those do a lot of updates -- well, a lot by our standards. Every time a spam message comes in, it it is added to the bayesian rule set for the user. I'm going to say that typically each user gets 100 spam messages a day and there are 200 users. But each new rule consistes of several table updates. Even so, its not like we're ebay. Anyway, speed of updates is critical because we can't have the mail system getting bogged down by database updates. I put the bayesian rules in a mysql DB in the first place because it was getting bogged down saving bayesian data to bbm files on the mail server. I just want to make sure that I'm not setting myself up for a disaster. If writes are an issue and the DB can fit in RAM and you don't mind losing a few writes, then you might try mounting the DB or bbm files in a tmpfs filesystem (aka ramdisk) with a sync to disk every 5 minutes or so. I read an article about someone doing that for ganglia data because the number of transactions was killing them. Jason ___ Linux-PowerEdge mailing list Linux-PowerEdge@dell.com https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq
Re: Third-party drives not permitted on Gen 11 servers
Please, email your Dell customer rep and complain about this! I did. I contacted my Dell customer rep and he forwarded my complain to the product support group. He said they may re-evaluate things if lots of people complain. (I can hope...) We don't have the Dell R710's, and I still complained. Thanks, Jason ___ Linux-PowerEdge mailing list Linux-PowerEdge@dell.com https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq
Re: R410's shipped out with BIOS showing 4 cores instead of 8
Jason Edgecombe wrote: Stephan van Hienen wrote: Subject: R410's shipped out with BIOS showing 4 cores instead of 8 Has anyone seen this problem before. We had the same issue with 3 R510's received last week. Some R710's received a couple of months ago had the correct bios setting. I have seen one or two Dell systems where hyperthreading was turned off in the BIOS in the factory. Jason I forgot to mention that these were Optiplex's or Precisions. ___ Linux-PowerEdge mailing list Linux-PowerEdge@dell.com https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq
Re: NICs in RHEL / PE2850
Brian O'Mahony wrote: I am setting up a 2850 to do some testing for moving our code repositories over to SAN storage. I have a pe2850 with two onboard NICs and a dual port PCI nic. All four ports are coming up as Intel e1000 ports. Is there any way of telling from inside the OS which exact port eth0,1,2,3 actually are? Ive seen RHEL change port around before, and I was just wondering how to check which interface corresponds to which physical port, as this will probably be important when we implement it. On another note, has anyone got any suggestions on how to keep memory usage at about 80% while doing benchmark tests? I want to compare the read/write speed of local vs SAN storage, while the machines are in use. However the chances of getting to do it in the live environment are zero. If I can keep the memory usage at about 85% [cpu load is about .4 so is pretty negligible] I would have some data to look at. For your memory limiting, try the following: ulimit -v XXX # where XXX is the number of kilobytes that you want to limit your memory usage to. This only works in userland processes that are spawned from the shell where you run this command. To limit a system daemon, put that line in the init.d script and restart the daemon. This is a per-process limit, so it's still possible for the total memory used to exceed your limit. Do your math and tests accordingly. Jason ___ Linux-PowerEdge mailing list Linux-PowerEdge@dell.com https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq
Re: Running custom code on the DRAC
Adam Nielsen wrote: Hi all, Just some more info now that I've had a chance to look at the source release in more detail. I've downloaded the .iso and checked it all out. Some code is missing (e.g. the C library) but other code for Dell's own utilities is included, which is great to see given that they didn't have to release it. Unfortunately Dell haven't released any tools to work with the firmware so we can't actually compile the code that was released or flash it onto the device. Apparently this is still in the works, so in the mean time we'll just have to make do with what we've got. If anyone has any plans to start working with the code, please keep me in the loop so we don't duplicate any effort! I have now installed a cross-compiler and managed to get some test code running on the device. The hard part was figuring out how make files available on the DRAC, but luckily it has NFS support built in so I could just mount a folder from another PC and run the code from there. The Dell release didn't include any details on the build system, so for anyone else wanting to experiment you will need a little-endian MIPS compiler with the GNU C library. Since I have a Gentoo Linux environment, this command installed the right cross-compiler for me: $ crossdev -t mipsel-unknown-linux-gnu --without-headers I could then compile some code with: $ mipsel-unknown-linux-gnu-gcc -o hello hello.c Once that folder was mounted on the DRAC, running ./hello printed Hello world as expected. So it looks like we can already start building improvements to the DRAC firmware, but unfortunately we won't be able to make major changes until Dell release the rest of the code required under the GPL. which flavors of DRAC have source available? Jason ___ Linux-PowerEdge mailing list Linux-PowerEdge@dell.com https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq
Re: idrac express vs enterprise?
Alexander Dupuy wrote: Jason Edgecombe asked: In the Linux on Dell wiki, it mentions that the idrac6 can be used as a fencing device in an linux-ha setup. Can the idrac express be used for this, or is the idrac enterprise required? For fencing, as I understand it, you simply need to be able to make absolutely sure that the disabled host is not performing any I/O to shared disks, etc. (and be able to undo that). With either iDRAC6 Express or Enterprise, and even with the non-DRAC BMC on 9th generation and low-end Nehalem (e.g. R410), this is possible by powering off the host system, via IPMI (ipmitool -I lan power off) or (on iDRAC6 or other DRAC) via remote racadm (racadm serveraction powerdown). Jeff Ewing replied: I believe the idrac express does not have remote console or remote media support. (nor its own RJ45 plug) Trey Sheldon replied: Actually the express *does* have remote console, it is however missing remote media support. Biggest thing missing is the local racadm command. While the iDRAC Express has remote *serial* console - it does not support remote access to the VGA console via the Java GUI client (and as Jeff Ewing noted, the dedicated NIC RJ45 and remote media support are also absent). However, those three features (and the last crash screen capability, since there is no VGA capture) are pretty much the only ones absent from the Express. You have the full HTTP/S server interface, remote racadm and SSH access. The -h (playback history) option to the SSH console com2 command doesn't seem to work for me, but I don't know if that is an Express/Enterprise feature, or whether it only works for BIOS redirected serial output rather than Linux serial console. Local (on the host CPU) racadm *is* supported with the iDRAC Express (I use it frequently) and ssh to the iDRAC6 also allows local (on the iDRAC6) racadm (I didn't know you could do this until very recently, but just checked to confirm): /admin1- racadm getsysinfo RAC Information: RAC Date/Time = 11/20/2009 10:50:50 Firmware Version= 1.20 Firmware Build = 01 Last Firmware Update= 11/13/2009 23:20:45 Hardware Version= 0.01 MAC Address = 00:24:e8:79:0f:2d That on-the-DRAC racadm ifconfig is an interesting command - from the output you could almost guess what Linux distro rev it's running :-) @alex cool, thanks! It sounds like the idrac express is similar to Sun's ALOM in console functionality. I was concerned that there was no console functionality. I can deal with a serial console. Silly question, but I'm assuming that the idrac express can remotely powerup the host. Is that correct? Can the host powercycle the idrac express without needing to reboot the host? Thanks, Jason ___ Linux-PowerEdge mailing list Linux-PowerEdge@dell.com https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq
