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DRBD,GFS2 and GNBD without all clustered cman stuff
by Raffaele Camarda 14 Apr '10

14 Apr '10

Hi all, Where i want to arrive: 1) having two storage server replicating partition with DRBD 2) exporting via GNBD from the primary server the drbd with GFS2 3) inporting the GNBD on some nodes and mount it with GFS2 Assuming no logical error are done in the last points logic this is the situation: Server 1: LogVol09, DRDB configured as /dev/drbd0 replicated to Server 2. DRBD seems to work perfect as cat /proc/drbd Server 2: LogVol09, Secondary for /dev/drbd, cat /proc/drbd is ok What i thought to do was to export via GNBD the /dev/drbd0 to import it on a couple of nodes. Using GFS2 as FS for concurrent usage. I got to format the GFS2 FS on the Server 1 drbd0 device. But was unable to mount it because gfs_controld wasn't accepting connections, i discovered that cman manage gfs_controld. In any case i started it manually and discover that it try to use ccsd daemon which i have not installed. Ok, i do not need to mount it locally so i started configuring GNBD, started manualli the server end stated the export command...again the cman/ccsd problem: gnbd_clusterd: ERROR cannot join cman Now, what i'm asking: am i forced to use all the cluster stuff cman, ccsd...fence...with this configuration? I would like only to use the tools i need: DRDB, GNBD and GFS2 without cluster facilities. Thanks Raffaele

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timeout problem
by tony.chamberlain＠lemko.com 14 Apr '10

14 Apr '10

I found the response below today online to a question I had. For some reason I never got the mail. I am not quite clear on what "DHCP + DFG + 2DNS entries" means when calculating the IP to set for the router: Thanks Re: [CentOS] Yum/WGET/HTTP sourceforge etc. new April 12, 2010 08:10AM On Sun, 2010-04-11 at 22:57 +0000, tony.chamberlain(a)lemko.com wrote: > Here is what I tried. When I put the machine directly on an AT&T IP connection (12.147.X.Y) everything worked fine. > Same with Comcast on a direct link. The times I am having problems is when our router is hooked up to a Comcast > IP (70.88.X.Y) and assigns 192.168.5.X addresses to our machines. So when I was doing the above from 192.168.5.27 > going through the router through Comcast is when I had the problem. > --- Try this: For the NIC on your Comcast router set its ip to one that the dhcp in the router gives out + DFG + 2 DNS entries. In order to have it static. I see lots of routers with your problem. John

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ClamAV "clamscan" command using huge amount of RAM
by Sean Carolan 14 Apr '10

14 Apr '10

We have a perl cgi script that accepts uploaded files and runs clamscan on them. While observing the system performance I noticed that each clamscan process consumes up to 250MB of RAM. Is this normal for ClamAV? This seems like an enormous amount of RAM, for simply scanning one file for viruses.

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SVN server update
by Roland RoLaNd 14 Apr '10

14 Apr '10

Dear all, i have SVN server 1.4.x working on production. i want to go ahead and update to 1.6.x i'm hoping your experience would help me prevent possible downtime.. is there any issues that may arise from updating the SVN server from one version to another on a production server? _________________________________________________________________ Hotmail: Free, trusted and rich email service. https://signup.live.com/signup.aspx?id=60969

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warning: only V3 signatures can be verified, skipping V4 signature
by Tommy Zong 14 Apr '10

14 Apr '10

Hello, Anytime when I issue rpm command, there will be a warning massage "warning: only V3 signatures can be verified, skipping V4 signature". For example, [root@hadoop-datanode44 ~]# rpm -qa | grep -i post postgresql-server-8.3.8-1PGDG.rhel4 warning: only V3 signatures can be verified, skipping V4 signature postgresql-8.3.8-1PGDG.rhel4 postgresql-pgpool-II-2.3.1-1 postgresql-libs-8.3.8-1PGDG.rhel4 postgresql-devel-8.3.8-1PGDG.rhel4 What does this message mean? Thanks.

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Re: [CentOS] Slightly OT: which hardware for CentOS file server (Samba, 2 To storage, 50 users)?
by Les Bell 14 Apr '10

14 Apr '10

Niki Kovacs <contact(a)kikinovak.net> wrote: >> And so on. In the end, I decided not to bother and just left. << I think most consultants have one* of those in their pasts. The trick is to cut your losses, as soon as possible. You had a narrow escape there. Best, --- Les Bell [http://www.lesbell.com.au] Tel: +61 2 9451 1144 * Two, just possibly. Three, and you're a slow learner who has no business being a consultant.

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Disappearing DNS entry
by Hugh E Cruickshank 14 Apr '10

14 Apr '10

CentOS 4.8, BIND 9.2.4, DHCP 3.0.1 Hi All: I have a rather perplexing problem where the DNS entry in BIND for one of my network printers sporadically "disappears" from our zone file (but not the reverse zone file). We have four Lexmark printers connected locally over our internal LAN using static IP addresses. We have 3 T640n printers and a T642n printer and it is only the T642n printer that this is happening to. I thought I had it licked when I discovered that both DDNS and mDNS were enabled on this printer but not the others, however disabling those has had no effect. We do use DHCP for the bulk of our Windows workstations and DHCP is configured to update the DNS server and this appears to work fine (once I disabled all the "Register this connection's address in DNS" options on the workstations). I have found one suspicious entry in /var/log/messages: Apr 12 17:34:14 fisds0 named[5210]: client 192.168.2.7#10242: updating zone 'forsoft.com/IN': deleting an RR This would seem to indicate that the printer itself has issued the request to the DNS server but for the life of me I cannot see what might be doing it. Has anyone encountered something similar and can point me in the right direction? TIA Regards, Hugh -- Hugh E Cruickshank, Forward Software, www.forward-software.com

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XFS-filesystem corrupted by defragmentation Was: Performance problems with XFS on Centos 5.4
by Bernhard Gschaider 13 Apr '10

13 Apr '10

Before I'd try to defragment my whole filesystem (see attached mail for whole story) I figured "Let's try it on some file". So I did > xfs_bmap /raid/Temp/someDiskimage.iso [output shows 101 extents and 1 hole] Then I defragmented the file > xfs_fsr /raid/Temp/someDiskimage.iso extents before:101 after:3 DONE > xfs_bmap /raid/Temp/someDiskimage.iso [output shows 3 extents and 1 hole] and now comes the bummer: i wanted to check the fragmentation of the whole filesystem (just for checking): > xfs_db -r /dev/mapper/VolGroup00-LogVol04 xfs_db: unexpected XFS SB magic number 0x00000000 xfs_db: read failed: Invalid argument xfs_db: data size check failed cache_node_purge: refcount was 1, not zero (node=0x2a25c20) xfs_db: cannot read root inode (22) THAT output was definitly not there when I did this the last time and therefor the new fragmentation does not make me happy either xfs_db> frag actual 0, ideal 0, fragmentation factor 0.00% The file-system is still mounted and working and I don't dare to do anything about it (am in a mild state of panic) because I think it might not come back if I do. Any suggestions most welcome (am googling myself before I do anything about it). I swear to god: I did not do anything else with the xfs_*-commands than the stuff mentioned above Bernhard

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centos 5.3x64 iso
by aurfalien＠gmail.com 13 Apr '10

13 Apr '10

Hi all, My 5.3 DVD is ruined and the 5.4 installer won't run on my box w/o errors (uts not the disk, something to do with the installer itself). I usually just install 5.3 and then yum it to 5.4. Does any one know were I can find a 5.3x64 iso file? - aurf

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Re: [CentOS] 12-15 TB RAID storage recommendations
by Seth Bardash 13 Apr '10

13 Apr '10

Just finished building a new server for inhouse use. 12.8TB Needed a nfs and samba server which could store 10TB and be reliable. Also wanted to replace out DHCP server and our internal DNS server. So needed to run dnsmasq plus ntp for time serving. This machine replace 3 older units. We used a Supermicro 3U case with 15 sata shuttles and 2N+1 760 Watt PS. On ebay for 300.00 Used a Supermicro H8DME-2 MB cause I had one sitting around. If I was going to buy one it would have been a Tyan S2932G2NR-SI for reliability (we have sold a bunch of these and they always work) Installed dual AMD 2382's and 16 GB DDR2-800 RECC plus 4 wire HSF's. Went to the 3ware online store and purchased a 9550SXU-16ML with the breakout cables for 340.00 Yes, I know its PCI-X. It was inexpensive and it runs almost as fast as the 9650 series at twice the price. Installed 15 pcs of the WD1001FALS disks. Very reliable and low cost even though they are desktop drives. Used these since we always have 3 on the shelf as spares and WD turns a bad one around in about 5 days. We have installed over 200 of these drives in raid arrays and have had 2 fail in the last 6 months. BTW, Initializing took <8 hours not days. Set it up as a Raid 5 array with one hot spare and autorebuild. Have tested it with both Centos 5.4 x86_64 and OpenSUSE 11.1 x86_64. Also installed an LSI SCSI card and a Sony AIT-5 Tape drive with Bacula for data backup and recovery. Again, all worked fine and the machine was able to do backups and keep a GigE connection saturated. Using an in house piece of code called disktest we are seeing 268 MB / sec on writes and 347 MB / sec on reads using 32 GB test files, 131K buffer sizes and single threading. If you would like to see a system that is almost identical, have a look at Coraid.com. They use a dual xeon and a BSD custom kernel. Hope this config helps...... Seth Bardash Integrated Solutions and Systems LLC seth(a)integratedsolutions.org Failure cannot survive knowledge and perseverance!

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