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34752 discussions

Load balancing email?
by Benjamin Smith 27 Oct '05

27 Oct '05

Currently, we have two mail relays for inbound messages, and a third for POP. The inbound messages go thru all the CPU-intensive anti-spam stuff, and then they relay it to the POP server for pickup. Currently, one of these is the "primary", and the other is "secondary", and I'd like them to be considered more or less as equals, since the "primary" system is getting beaten pretty hard. The DNS zone file says something like this: ############################### @isp.com <SNIP> IN MX 100 mx1.isp.com. IN MX 1100 mx2.isp.com. <SNIP ################################ I seem to recall that I make them act as "equals" by simply changing this to ############################### @isp.com <SNIP> IN MX 100 mx1.isp.com. IN MX 100 mx2.isp.com. <SNIP ################################ so that they both get about the same amount of inbound messages. Has anybody here actually done this? How well does this work as far as failover if either system fails? -Ben -- "The best way to predict the future is to invent it." - XEROX PARC slogan, circa 1978

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RE: [CentOS] CentOS 4.x friendly WiFi Cards??
by tagarsi, arun 27 Oct '05

27 Oct '05

Hi, Not sure if this is useful but I have had no problems with the belkin 54G PCMCIA cards and ndiswrapper. Arun -----Original Message----- From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org]On Behalf Of Brian Watters Sent: Thursday, October 27, 2005 6:29 AM To: CentOS mailing list Subject: Re: [CentOS] CentOS 4.x friendly WiFi Cards?? Thanks for the fast reply .. I guess I should be a bit more specific .. This is for a laptop and thus I need a PCMCIA card? .. BRW _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos

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Create users with caps A123??
by Alberto 27 Oct '05

27 Oct '05

Hi, After last updates I cannot create user that start with caps like A123. How can avoid that? and create user like that?

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RE: [CentOS] symantic ghost with centos 4.2
by Drew Weaver 27 Oct '05

27 Oct '05

Its not a bad disk, it does it to me too. -----Original Message----- From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] On Behalf Of Rodrigo Barbosa Sent: Wednesday, October 26, 2005 4:46 PM To: CentOS mailing list Subject: Re: [CentOS] symantic ghost with centos 4.2 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Wed, Oct 26, 2005 at 03:09:17PM -0500, Jerry Geis wrote: > I am trying to use symantic 8.X and ghost a disk. I get > > "Apllication Error 29004. Read sector failure, result = 1, drive = 0, > sectors 2071692247 to 2071692255" > > when trying to ghost the disk. Sure sounds like a bad disk to me. []s - -- Rodrigo Barbosa <rodrigob(a)suespammers.org> "Quid quid Latine dictum sit, altum viditur" "Be excellent to each other ..." - Bill & Ted (Wyld Stallyns) -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.1 (GNU/Linux) iD8DBQFDX+sdpdyWzQ5b5ckRAg+GAJ9ykWe1IyXTThYh3j7ySHqc5ZCbCQCdFXDx JUmqnO52A5bOB3eHao+9MuE= =dG3V -----END PGP SIGNATURE----- _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos

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Problem rebuilding glibc for xen
by Dave Hatton 27 Oct '05

27 Oct '05

I would like to rebuild glibc specifically with the -mno-tls-direct-seg-refs to allow better performance with Xen. I'm using Centos 4.2 x86_64 on an Athlon 3200+. I'm using the 2.6.9-11.106.unsupported kernel for reiser support. My thought was to download and install the SRPM and then rpmbuild with no changes to make sure it works before adding the above flag. Unfortunately, the rpmbuild hangs during tst-tls9. Has anyone else managed this? As an alternative suggestion is there a chance that a build of glibc with this flag could be added to centosplus? This would be very useful until this change makes it into the main stream. Thanks Daveh

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RE: [CentOS] Question on Quad Opteron HP DL 585
by Miskell, Craig 27 Oct '05

27 Oct '05

> -----Original Message----- > From: centos-bounces(a)centos.org > [mailto:centos-bounces@centos.org] On Behalf Of Sivakumar Raju > Sent: Thursday, 27 October 2005 1:25 p.m. > To: centos(a)centos.org > Subject: [CentOS] Question on Quad Opteron HP DL 585 > > Hi, > > I have a HP DL 585 server with Quad Opteron processors and 32 > Gbytes of RAM. > > I would like to know whether CentOS 3.5 x86_64 will recognize > all 4 CPUs and 32 Gbytes of RAM. > > I will also running EDA tools like PriteTime, and Magma on > this server. Does CentOS has any issues > with these tools? > > your help on this question is appreciated. > > Thanks > Siva. FWIW, We have similar (only 16GB of RAM though), and RHEL 3 U5 (the upstream equiv of CentOS 3.5) is working fine. I can't speak to the other questions, having never seen nor heard of those packages before, Craig Miskell ======================================================================= Attention: The information contained in this message and/or attachments from AgResearch Limited is intended only for the persons or entities to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipients is prohibited by AgResearch Limited. If you have received this message in error, please notify the sender immediately. =======================================================================

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which process & file taking up disk IO?
by Lim Wee Cheong 26 Oct '05

26 Oct '05

I'm having load problems on a server. The bottleneck appears to be disk IO. iostat would show ~100, under %util, during peak usage. i'm running things like clam antivirus, pop, exim, apache, mysql on the server. is there a way to check which process and which file is taking up disk IO? or see what is being written to the disk? i'm very puzzled as the amount of writes is 10 times higher than the reads; and I can't figure out what the writes are for. Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s rkB/s wkB/s avgrq-sz sda3 2.20 32.94 2.12 17.42 34.54 407.74 17.27 203.87 22.63 avgqu-sz await svctm %util 1.28 65.38 5.10 9.97 Is it normal for the %util to be 9.97% for the above reads/ writes on a U320 drive? or perhaps i have a badly misconfigured server? the drive is 2 x 146GB, RAID 1 using the LSI logic LSI22320-R card. #elvtune /dev/sda /dev/sda elevator ID 1 read_latency: 2048 write_latency: 8192 max_bomb_segments: 6 #cat /proc/sys/vm/bdflush 80 50 0 0 600 10000 80 70 0 Server is running CentOS 3.5; CPU and RAM are very much under utilised. Regards, Wee Cheong

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RE: [CentOS] symantic ghost with centos 4.2
by Drew Weaver 26 Oct '05

26 Oct '05

If you get this to work please for the love of god let me know. -Drew -----Original Message----- From: centos-bounces(a)centos.org [mailto:centos-bounces@centos.org] On Behalf Of Jerry Geis Sent: Wednesday, October 26, 2005 4:09 PM To: centos(a)centos.org Subject: [CentOS] symantic ghost with centos 4.2 I am trying to use symantic 8.X and ghost a disk. I get "Apllication Error 29004. Read sector failure, result = 1, drive = 0, sectors 2071692247 to 2071692255" when trying to ghost the disk. anyone done this successfully? symantic supports ext3. Thanks, jerry _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos

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vsftp passive mode / iptables issue
by John Hinton 26 Oct '05

26 Oct '05

I've been struggling with my firewall and getting vsftp to work in passive mode. It seems that everything on this hosting server works just fine without the eth0 entry in my iptables except for vsftp in passive. Am I opening up too much by adding the eth0 line? -A INPUT -j RH-Firewall-1-INPUT -A FORWARD -j RH-Firewall-1-INPUT -A RH-Firewall-1-INPUT -i lo -j ACCEPT -A RH-Firewall-1-INPUT -i eth0 -j ACCEPT <---- THIS ENTRY -A RH-Firewall-1-INPUT -p icmp --icmp-type any -j ACCEPT -A RH-Firewall-1-INPUT -p 50 -j ACCEPT -A RH-Firewall-1-INPUT -p 51 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 20 --state NEW -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m state -m tcp --dport 21 --state NEW -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m state -m tcp --dport 22 --state NEW -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m state -m tcp --dport 25 --state NEW -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m state -m tcp --dport 80 --state NEW -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 110 --state NEW -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 443 --state NEW -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 465 --state NEW -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 587 --state NEW -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 995 --state NEW -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m tcp -m state --dport 5561 --state NEW -j ACCEPT -A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited TIA! John Hinton

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Re: [CentOS] Problem SSH
by minichaz 26 Oct '05

26 Oct '05

On Tue Oct 25 17:54 , Mauricio Merlin <mauricio(a)cimed.ind.br> sent: >My Centos 4.1 only accept connections from localhost, my file conf is >default. >error: ssh: connect to host 192.168.1.78 port 22: No route to host > > >thanks >_______________________________________________ >CentOS mailing list >CentOS(a)centos.org >http://lists.centos.org/mailman/listinfo/centos > This isn't an SSH problem and it's not a firewall problem either as that would produce a "connection refused" message or similar. You will need to allow incoming SSH connections on the machine to which you are connecting but you don't appear to have got to that stage yet. "No route to host" would indicate that there's a basic network connectivity problem between the two machines in question. Check you can ping the machines from each other, I suspect you can't. Most likely you've got a typo in a netmask or something similar. Charlie

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