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Re: [CentOS] HP ILO Fence Configuration
by Patricio A. Bruna 05 Aug '08

05 Aug '08

Is very Easy. If you are using system-config-cluster you can do this via the GUI and you'll need to enter the IP, username and password of the ILO. ------------------------------------ Patricio Bruna V. IT Linux Ltda. http://www.it-linux.cl ----- "Finnur Örn Guðmundsson" escribió: > Balaji wrote: > > Dear All, > > > > Currently i am using HP x6600 Server and I have installed RHEL4 Update > > 4 AS Linux and > > RHEL4 Update 4 Support Cluster Suite in my server > > I am new in fence and can any one help me how to configure HP ILO > > fence in my server > > and HP ILO Fence Functionality > > > > Regards > > -S.Balaji > > > > _______________________________________________ > > CentOS mailing list > > CentOS(a)centos.org > > http://lists.centos.org/mailman/listinfo/centos > Hi there, > > I would check out the documentation for administering and running RHCS @ > RHEL 4: > http://www.redhat.com/docs/manuals/csgfs/browse/rh-cs-en/index.html > > RHCS comes with a tool, system-config-cluster (And Ricci/Luci on RHEL 5) > that might help you alot in your fencing configuration....it's very easy > to add fence devices for each node (including iLO). > > Hope this helps. > > Bgrds, > Finnzi > _______________________________________________ > CentOS mailing list > CentOS(a)centos.org > http://lists.centos.org/mailman/listinfo/centos >

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DVI + VGA?
by MHR 05 Aug '08

05 Aug '08

I have an LCD monitor with both VGA and DVI connectors on it, and a video card to match (both connectors). If I want to switch from the VGA (currently in use) to the DVI, do I need to do anything special other than switch wires? I didn't see anything in google that was helpful (though I may not have used a smashing search...). Thanks. mhr

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rsync question
by Mag Gam 05 Aug '08

05 Aug '08

Hi All, I am trying to understand the purpose of rsyncd. Why does it exist? Why not just use rsync ad-hoc or via script? Also, to a more serious note. I need to keep a filesystem on 1 server and another server synced by. What is the best way to do this? I want to have /source and /target to be exactly the same. I don't want any extra files in /target. I want the timestamps to be the exact same in /target. Does anyone have a good rsync arguments I can use? I have been using -avzl but I was wondering if there was anything better. TIA

4 3

64bit vs 32bit
by Matt 05 Aug '08

05 Aug '08

I am upgrading a server that mounts in a rack. Its going on the cheapest socket 775 CPU I can buy and in a 1u rack case. All its for is keeping some log files and doing some simple MYSQL/PHP database stuff. Not a work horse at all. Anyway, is it better to go 64bit or 32bit for the CentOS 5.x install? I do not see needing huge amounts of RAM or anything like that on this box. Would the 32bit version be more tried, proven and stable? Matt

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Outbound connections not using primary eth0 IP
by Neil Aggarwal 04 Aug '08

04 Aug '08

Hello: I have a machine running CentOS 5.2 I added two IP addresses to eth0 by copying /etc/sysconfig/network-scripts/ifcfg-eth0 to /etc/sysconfig/network-scripts/ifcfg-eth0:0 /etc/sysconfig/network-scripts/ifcfg-eth0:1 and changing the relevant IP info. I am now seeing outbound connections failing at my firewall from services like NTP, etc. since they are now using a source address from one of the added IP addresses instead of the original eth0 IP which is allow through the firewall. I don't want to have to keep maintaining 3 copies of each firewall rule to accommodate the new IP addresses. Is there a way to tell the machine to use the eth0 IP address as the source address for connections? Here is the original ifcfg-eth0 file: # nVidia Corporation MCP55 Ethernet DEVICE=eth0 BOOTPROTO=none BROADCAST=206.123.70.63 HWADDR=00:30:48:7A:B4:FE IPADDR=206.123.70.50 NETMASK=255.255.255.240 NETWORK=206.123.70.48 ONBOOT=yes GATEWAY=206.123.70.49 TYPE=Ethernet Here is ifcfg-eth0:0 # nVidia Corporation MCP55 Ethernet DEVICE=eth0:0 BOOTPROTO=none BROADCAST=72.249.130.47 HWADDR=00:30:48:7A:B4:FE IPADDR=72.249.130.42 NETMASK=255.255.255.248 NETWORK=72.249.130.40 ONBOOT=yes GATEWAY=72.249.130.41 TYPE=Ethernet Here is ifcfg-eth0:1 # nVidia Corporation MCP55 Ethernet DEVICE=eth0:0 BOOTPROTO=none BROADCAST=72.249.130.47 HWADDR=00:30:48:7A:B4:FE IPADDR=72.249.130.43 NETMASK=255.255.255.248 NETWORK=72.249.130.40 ONBOOT=yes GATEWAY=72.249.130.41 TYPE=Ethernet Any ideas why this is happening? Thanks, Neil -- Neil Aggarwal, (832)245-7314, www.JAMMConsulting.com Eliminate junk email and reclaim your inbox. Visit http://www.spammilter.com for details.

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Questions on cpu frequency scaling AMD vs. Intel
by Kai Schaetzl 04 Aug '08

04 Aug '08

I've been playing and comparing frequency scaling between AMD and Intel CPUs yesterday and there seem to be great differences between AMD and Intel and some gotchas. This is all on CentOS 5.2 with latest Xen kernels (which are supposed to be powersaving-enabled since 5.2). AMD: It seems once I get the AMD CPU to use the ondemand governor it works very well and very efficiently. But this is not set by default, one has to set ondemand explicitely in /etc/sysconfig/cpuspeed and run cpuspeed on bootup. Otherwise it just knows about userspace and performance and defaults to performance. Intel: On the other side ondemand is on for Intel CPUs automatically, but it doesn't seem to work. No matter if I run cpuspeed or not the current frequency is shown as 2000000. This is the scaling_min_freq for both CPUs I checked. The scaling_max_freq is 2.333/2.5. One is a Xeon Dual Core, one a Xeon Quad Core. With "not seem to work" for Intel I mean it doesn't act on demand as it should. I tested by gzipping and gunzipping a 4 GB image file. I used top to observe CPU utilization. With a dual core the idle percentage stays around 50% for a while and only goes below this threshold near the end of the operation. I deduce that means that gzip can make use of only one core and only when it comes to writing to disk or using other external tools it can utilize more CPU power because that task is taken over to the other core. Same observation with quad core (and 75%). There is no difference between AMD and Intel in this respect, but the task seems to run a bit more efficiently on an AMD CPU - e.g. it is able to max out idle at 0% at least for short periods while this is almost impossible to observe with the Intel CPUs. The timing also shows that the AMD is the fastest one. (The AMD, a very new low voltage X2, also runs at 2500 max.) My question: why don't the Intel CPUs don't scale up on demand? Could there be a bug in the driver that it measures overall utilization (which is at 50% most of the time) and not single core utilization, thus never reaching the threshold for scaling up? up_threshold is at 80 for both CPUs. (cat /sys/devices/system/cpu/cpu0/cpufreq/ondemand/up_threshold) I have a somewhat related question. That very new AMD CPU mentioned above was not recognized by CentOS 5.2 and the current frequency was shown as 800000 (instead of 2500000), although it was running in full speed. The latest kernel corrected this. It's still unknown, but the frequency is now calculated correctly and thus frequency scaling works now (it didn't work when it was miscalculating at 800000). On the other hand, I have an older low-voltage AMD CPU (probably about 2 years on the market) that is recognized as X2 3800+ but frequency scaling fails because it miscalculates the current speed to 800 MHz as well. Is there anything I can do about that? Where could I check whether this CPU should be supported in full and frequency scaling working? (I'm not sure, but I think it may have actually worked when it was running in a different motherboard.) Kai -- Kai Schätzl, Berlin, Germany Get your web at Conactive Internet Services: http://www.conactive.com

3 17

model_editor.py
by Bob Taylor 04 Aug '08

04 Aug '08

I have googled for this and also grepped the hplip sources without finding it. It is used to convert the models.dat file into models.xml. I need to insert my printer data into this file as it is not in the 5.2 hplip rpm. Could anyone help? I do not want to replace 5.2 rpm with a newer one. Thanks. Bob -- Bob Taylor

1 0

File system goes read-only once in a while
by Mufit Eribol 04 Aug '08

04 Aug '08

Hi, My Centos 5.2 server (5.1 suffered the same problem as well) has a logical volume on a RAID 10 array (4 SATA harddisks on a Highpoint RR2310 controller). /etc/fstab has an entry for this array as below /dev/raid_vg0/raid_lv0 /mnt/raid ext3 defaults 0 0 Normally it works OK. But, file system of "this volume" once in a while goes "read only" mode. The RAID software reports no problem with the hard disks. After reboot, the system comes back in normal rw mode. What could be the reason?. I would appreciate any help/hint. Thank you, Mufit

6 23

Fetchmail pop server and clean spam messages
by nightduke 04 Aug '08

04 Aug '08

Hi i want to fetchmail from a pop server and check every email to any rbl spamhaus,spamcop,etc and if match at any rbl the email will be deleted. It's possible to do this? Thanks Nightduke

4 4

GFS and Smaill Files
by Patricio A. Bruna 04 Aug '08

04 Aug '08

Hi, I had found on the list that i can improve the performance of GFS with small files if i adapt the size of the rsbtbl_size/lkbtbl_size values. But it also found that this has to be done after loading the dlm module, but before the lockspace is created. What means "before the lockspace is created", before the GFS partitions are mounted? How i do this? ------------------------------------ Patricio Bruna V. IT Linux Ltda. http://www.it-linux.cl Fono : (+56-2) 333 0578 - Chile Fono: (+54-11) 6632 2760 - Argentina Móvil : (+56-09) 8827 0342

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