Open Source

ZFS system hits high load during scrub

Leave a Comment / FreeBSD, Open Source, ZFS / By /

My ZFS system hits a high load average every week during its scrub. Here is what top looks like after I pressed i and then S: last pid: 42049; load averages: 3.78, 3.26, 3.42 up 18+13:47:14 11:43:01 220 processes: 3 running, 216 sleeping, 1 waiting CPU: 7.5% user, 0.0% nice, 12.8% system, 1.2% interrupt, 78.5% idle Mem: 765M Active, 236M Inact, 8667M Wired, 17M Cache, 3284M Buf, 22G Free Swap: 8192M Total, 2404K […]

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named and forwarding

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In your named.conf, you will find this: I have always turned that on. I like to use my upstream hosts. Today, I turned it of, because of this: $ host lkjsdf lkjsdf has address 199.101.28.20 Host lkjsdf not found: 3(NXDOMAIN) What’s that IP address? That’s not relevant, but it is important. It’s the hostname of a web assistant engine. My upstream has decided to implement what I think is a dirty hack. I

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Creating a FreeBSD jail to run DHCP and DNS

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I’m in the process of setting up a new gateway/firewall. The new hardware will be faster and have more space. At present, the old firewall is also providing DHCP and DNS services. I want to move those off the gateway and onto another server. Why? I want the gateway to run only services that are related to gateway/firewall services. That keeps things simple. At present, the new firewall has just 43 packages installed.

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The new gateway configuration

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Today I created the new gateway machine. It is a ZFS-only system with 3x3TB drives in a mirror configuration. The hardware was my old ZFS workhorse, now replaced by something with more storage. I had a moment of panic, thinking this server had just one NIC, but I was wrong. em0 will be the local 1G LAN. re0 will have to be my upstream connection. That’s pretty sad, given it’s only a 10Mb

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Using Bacula in a jail

Leave a Comment / Bacula, ezjail, FreeBSD, FreshPorts, Jails, Open Source / By /

I use FreeBSD. I’ve used it since 1998. For me, it does good stuff, reliably, and predictably. The community is very supportive and helpful. That goes a long way when choosing your open source operating system. Included within FreeBSD, since FreeBSD 4.0 in March 2000, is a great tool for separating out services and to provide a virtualization strategy: jails. Some will argue that jails are not virtualization. I contend that it’s a

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Moving Bacula Volumes from one Storage to Another

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A few weeks ago, I moved some Bacula Volumes from one Storage Daemon to another. In fact, I was decommissioning the old bacula-sd and creating a new one. I copied all the Volumes over. Backups have been running smoothly ever since. However. Today I tried a restore. It failed. Without any useful diagnostic information. Here is what I have: After thinking for a while, I started to wonder if this was a database

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nagios check for Bacula Pool volumes

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I’m thinking about a Nagios check to let me know the status of various Bacula pools. As in, how many volumes are left, versus the maximum number of volumes permitted in this pool. Here is the bconsole command I would use: And here’s the command line bit which might work: I’ll ponder this a bit longer, and decide if I really want this monitored.

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Adding in the new SCSI card

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I’ve been building up a new server lately. Now I’m ready to move the tape library from the old host to thew new host. As I opened the new server to insert the existing SCSI card, I discovered that I needed a new SCSI card. It just would not fit. This is the card I was using under FreeBSD 8.4: ahc0: <Adaptec 2944 Ultra SCSI adapter> port 0xa800-0xa8ff mem 0xfb7df000-0xfb7dffff irq 20 at

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