August 2013

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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Dynamic DNS solutions: what have you used?

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I’m looking for a dynamic DNS solution. When connected to my home network, my laptop gets a static IP address. When it connects via OpenVPN, it gets a different IP address. I’d like the hostname updated to reflect the last used IP address. I run my own DNS servers at home, and all my hosts are in there. I am not sure that something like noip.com is what I want. I use that

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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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