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bio website EverythingSysadmin.com
location Bloomfield, NJ
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visits member for 5 years, 7 months
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As of June 2013 I work for Stack Exchange!

I've been a big fan of Stack Exchange since the start. Literally. I was listening to Joel's podcast when he and Mark would talk about this secret project idea they had, I was excided when they finally said what it was, I was in the secret beta, and I've been a big fan since it went live!

The new hotness: Puppet, Linux (CentOS), Mac OS X, Python.

Old and broken (my knowledge is atrophying due to lack of use): Perl, Solaris, FreeBSD.

System administrator, network engineer, time management guru, speaker, author of 3 books, and generally silly person. I wrote "Time Management for System Administrators" from O'Reilly. I co-wrote "The Practice of System and Network Administration".

I work at StackExchange, owner of ServerFault and StackOverflow, but I do not speak for them.


2d
comment iptables starts dropping packets; temporarily fixed by doing restart; only from home
How consistent is the problem? i.e. can you reproduce the problem reliably?
Dec
17
answered What's the maximum number of IPs a DNS A record can have?
Dec
17
comment iptables starts dropping packets; temporarily fixed by doing restart; only from home
A better title for this would be, "iptables starts dropping packets; temporarily fixed by doing restart."
Dec
17
answered iptables starts dropping packets; temporarily fixed by doing restart; only from home
Dec
17
comment GIT SERVER High Avalability Config
Are you using plain git or have you added a web front-end like GitLab? GitLab has advice about HA configs: about.gitlab.com/high-availability In that case, you could rephase the question to be able what you don't understand in the instructions.
Dec
17
comment GIT SERVER High Avalability Config
Could you be more specific about what you want to achieve? For example, do you want a main system that gets copied to another machine so you can fail over to the copy? Do you need a true 'zero downtime' system where each commit is replicated to a clone immediately?
Dec
16
comment re-sync a single large file using rsync
After your test, please remember to "checkbox" this answer if it worked, or comment if it doesn't.
Dec
12
awarded  Tumbleweed
Dec
5
asked Failing over certain keepalived groups but not others
Nov
30
comment Multiple *NIX Accounts with Identical UID
@Astara What Unix variant doesn't permit this? As someone that is kind of a "unix historian" I'd be really interested in knowing.
Nov
30
comment Syncing rsnapshot backup drives
Did any UID/GID/perms change? If they changed, rsnapshot will (if configured) create a new file, not a hard link. (I'm also curious if you ever found the solution to this issue)
Nov
27
comment rsync many small files with long filenames takes a lot of bandwidth
Two tips: First, use --iniplace and you'll get half as many inode updates. Second, rather than running cron every 10 minutes, just run the command in a loop: while true ; do rsync ... ; sleep 600 ; done to prevent the problems mentioned in everythingsysadmin.com/2014/02/how-not-to-use-cron.html
Nov
27
comment rsync many small files with long filenames takes a lot of bandwidth
I'm surprised that ASCII text (which essentially uses only 5 bits) doesn't compress more. You might try the benchmarks again to verify your methods, compare "ssh -C" vs "-z" vs neither, and possibly capturing packets to verify. Also... how are you measuring the bandwidth used?
Nov
20
comment fastest way to transfer small files (faster than scp)
I'd like to see benchmarks of this against plain old "rsync -avP". Considering the optimizations added to rsync recently (i.e. in the last 5 years) I'd expect fewer and fewer situations would find this solution to be better.
Nov
20
comment fastest way to transfer small files (faster than scp)
There's no indication on whether this is or not a "professional server, networking, or related infrastructure" and you have assumed the worst. I assert the opposite is true. Dealing with problems of speed and scale is the epitome of professional engineering. In fact, UUNET founder and internet innovator once said, "The only real problem is scaling. Everything else is a sub-problem."
Nov
20
revised fastest way to transfer small files (faster than scp)
deleted 6 characters in body
Nov
20
answered fastest way to transfer small files (faster than scp)
Nov
17
awarded  Caucus
Oct
27
accepted On MacOS X, can I configure Wifi from Puppet or the command line?
Oct
17
comment full or incremental backup of large number of files
Agreed... plus you now can tune your system for more efficient meta-data access since that will be most of your disk I/O. Make sure you have enough RAM to make read-ahead effective, etc.