Author name: Dan Langille

I've been playing with computers since I read an Elementary Electronics magazine way back in the 1970s. I started contributing to open source projects in 1998. After that, I gradually moved from being a software developer to being a systems administrator.

Packet loss within the Verizon network

Leave a Comment / Networks / By /

Here’s packet loss to one of the Verizon DNS servers: My traceroute [v0.82] bast.example.org (0.0.0.0) Tue Oct 16 12:58:53 2012 Keys: Help Display mode Restart statistics Order of fields quit Packets Pings Host Loss% Snt Last Avg Best Wrst StDev 1. L100.PHLAPA-VFTTP-84.verizon-gni.net 10.7% 140 4.3 5.2 3.2 42.2 3.8 2. G0-6-2-2.PHLAPA-LCR-21.verizon-gni.net 8.6% 140 3.2 5.4 3.1 30.5 3.7 3. so-9-0-0-0.PHIL-BB-RTR1.verizon-gni.net 4.3% 140 5.9 11.3 3.2 89.0 14.6 4. so-7-1-0-0.PHIL-CORE-RTR1.verizon-gni.net 7.9% 140 3.7 5.8 […]

Packet loss within the Verizon network Read More »

Packet loss varies according to direction

Leave a Comment / Networks / By /

This is interesting. From my gateway to one of my servers, the packet loss is pretty big: bast.example.org (0.0.0.0) Tue Oct 16 12:15:36 2012 Keys: Help Display mode Restart statistics Order of fields quit Packets Pings Host Loss% Snt Last Avg Best Wrst StDev 1. L100.PHLAPA-VFTTP-84.verizon-gni 3.4% 119 4.8 6.1 3.2 60.1 7.4 2. G0-6-2-2.PHLAPA-LCR-21.verizon-g 8.4% 119 5.5 5.6 3.1 33.0 4.4 3. 130.81.199.18 4.2% 119 5.6 16.6 3.0 228.0 33.6 4. 0.xe-7-1-0.BR1.IAD8.ALTER.NET

Packet loss varies according to direction Read More »

Lots of packet loss

Leave a Comment / General / By /

This is not nice: [dan@bast:~] $ netstat -nr | tat -nr | grep default default 98.114.243.1 UGS 27 301523519 fxp0 default 2001:470:1f06:b80::1 UGS gif0 [dan@bast:~] $ ping -c 10 google.com PING google.com (74.125.228.36): 56 data bytes 64 bytes from 74.125.228.36: icmp_seq=0 ttl=253 time=11.680 ms 64 bytes from 74.125.228.36: icmp_seq=1 ttl=253 time=12.689 ms 64 bytes from 74.125.228.36: icmp_seq=2 ttl=253 time=11.089 ms 64 bytes from 74.125.228.36: icmp_seq=4 ttl=253 time=12.337 ms 64 bytes from 74.125.228.36: icmp_seq=5

Lots of packet loss Read More »

WordPress Migration: stripping out headers/footers, etc

Leave a Comment / WordPress / By / /

This is the third in a series of articles on my migration to WordPress. In this post, I’ll talk about how I removed non-core material from the website before I imported it. This is vital because WordPress adds its own headers and footers, which my website already contains. The first step is to remove all that cruft before creating the input file for the RSS Importer (first used in the previous post). The

WordPress Migration: stripping out headers/footers, etc Read More »

WordPress Migration: : The first attempts

Leave a Comment / WordPress / By / /

This is the second in a series of articles on my migration to WordPress. In this post, I’ll talk about why I decided to go with RSS-Importer and outline the first steps I took to get my posts into WordPress. These steps did not complete the migration. Rather, they were a proof of concept which led to other tasks to import yet more data into WordPress. In these posts, I will use the

WordPress Migration: : The first attempts Read More »

Pentabarf travel

Leave a Comment / Open Source, Pentabarf, PostgreSQL / By /

Here is the start of a query for pulling out travel requirements for conference attendees. SELECT P.last_name, P.first_name, CPT.arrival_from, CPT.arrival_to, CPT.need_accommodation FROM conference_person_travel CPT, conference_person CP, conference C, person P WHERE CPT.need_accommodation AND CPT.conference_person_id = CP.conference_person_id AND P.person_id = CP.person_id AND CP.conference_id = C.conference_id AND C.acronym = ‘BSDCan2015’

Pentabarf travel Read More »

Importing data into WordPress

Leave a Comment / WordPress / By / /

This is the first in a series of articles on my migration to WordPress. I have another diary (The FreeBSD Diary). I’ve been running it since 1998. More than once I’ve been asked why doesn’t it use some blogging package. Well, I didn’t know of anything back then, and cobbled together my own solution. The website is just static HTML, with some PHP functions to provide common headers, sidebars, footers, etc. There is

Importing data into WordPress Read More »

Destroying some unneeded ZFS snapshots

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

Last night, I found that I had a number of unused ZFS snapshots. I decided to destroy some of them. The first destroy locked up the system. Nagios reported everything was dead. I remotely power cycled the system. After it came back, I noticed that a scrub was in progress. This had not been initiated because of the power cycle. The scrub was a weekly automatic operation which started some hours before my

Destroying some unneeded ZFS snapshots Read More »

Bacula volumes – running low on disk space

1 Comment / Bacula, Open Source, PostgreSQL / By /

I have been using Bacula since early 2004. That’s nearly 9 years of great backups. Back in early 2010, I set up a multi-terabyte system in my basement with commodity hardware. Today, after about 18 months of backups, it’s starting to fill up. Now is the time to start restricting the creation of new Volumes in order to force the recycling of older expired (but still on disk) Volumes. NOTE: actually, I did

Bacula volumes – running low on disk space Read More »

Scroll to Top