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Jeremy Alons jalons

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jalons / mdadm
Created September 14, 2016 21:44
mdadm fun
ahlee@ipsum:~$ dd if=/dev/zero of=sda bs=1G count=1
1+0 records in
1+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 0.998008 s, 1.1 GB/s
ahlee@ipsum:~$ dd if=/dev/zero of=sdb bs=1G count=1
1+0 records in
1+0 records out
1073741824 bytes (1.1 GB, 1.0 GiB) copied, 2.60719 s, 412 MB/s
ahlee@ipsum:~$ sudo losetup /dev/loop0 sda
ahlee@ipsum:~$ sudo losetup /dev/loop1 sdb
@jalons
jalons / hidden
Created September 14, 2016 21:23
32 bit binary on 64 bit OS, terrible error message
(venv)[jeremy.alons@ipsum] ~/m
➜ file ./mdump
./mdump: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), dynamically linked, interpreter /lib/ld-linux.so.2, for GNU/Linux 2.2.5, not stripped
(venv)[jeremy.alons@ipsum] ~/m
➜ ./mdump
zsh: no such file or directory: ./mdump
@jalons
jalons / keybase.md
Created July 18, 2016 14:00

Keybase proof

I hereby claim:

  • I am jalons on github.
  • I am jalons (https://keybase.io/jalons) on keybase.
  • I have a public key ASDJXHgOe5PPSa1vwSR5oMIWQmE2kIvgLfDswtyMWvDHXQo

To claim this, I am signing this object:

@jalons
jalons / 0_reuse_code.js
Created July 2, 2016 02:38
Here are some things you can do with Gists in GistBox.
// Use Gists to store code you would like to remember later on
console.log(window); // log the "window" object to the console
@jalons
jalons / get_nodegroup_membership.py
Created June 21, 2016 17:06
Get the members of a nodegroup, must be run from the master
#!/usr/bin/env python
import salt.config
import salt.client
opts = salt.config.master_config('/etc/salt/master')
_client = salt.client.LocalClient()
_ret = {}
for _group, _target in opts.get('nodegroups').iteritems():
_ret[_group] = _client.cmd(tgt=_target, fun='test.ping', expr_form='compound').keys()
print _ret
@jalons
jalons / cloud.sls
Created March 20, 2013 19:05 — forked from auser/cloud.sls
#!py
import pprint
import yaml
space_character = " "
def run():
'''
Print the config files
'''
t = {
@jalons
jalons / graphite.md
Created November 23, 2015 15:40 — forked from ashrithr/graphite.md
Installing graphite 0.10, collectd and grafana on centos 6

Installing Graphite:

Graphite does two things:

  1. Store numeric time-series data
  2. Render graphs of this data on demand

What Graphite does not do is collect data for you, however there are some tools out there that know

@jalons
jalons / subprocess_timeout.py
Created July 10, 2012 22:05 — forked from kirpit/bash.py
Enables to run subprocess commands in a different thread with TIMEOUT option!
class Command(object):
'''
Enables to run subprocess commands in a different thread
with TIMEOUT option!
Based on jcollado's solution:
http://stackoverflow.com/questions/1191374/subprocess-with-timeout/4825933#4825933
'''
def __init__(self, cmd):
self.cmd = cmd
@jalons
jalons / functions.js
Created May 22, 2012 01:10 — forked from RedBeard0531/functions.js
Min, Max, Sum, Count, Avg, and Std deviation using MongoDB MapReduce
// derived from http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance#Parallel_algorithm
function map() {
emit(1, // Or put a GROUP BY key here
{sum: this.value, // the field you want stats for
min: this.value,
max: this.value,
count:1,
diff: 0, // M2,n: sum((val-mean)^2)
});
@jalons
jalons / Documentation.md
Last active August 29, 2015 14:27 — forked from KartikTalwar/Documentation.md
Rsync over SSH - (40MB/s over 1GB NICs)

The fastest remote directory rsync over ssh archival I can muster (40MB/s over 1gb NICs)

This creates an archive that does the following:

rsync (Everyone seems to like -z, but it is much slower for me)

  • a: archive mode - rescursive, preserves owner, preserves permissions, preserves modification times, preserves group, copies symlinks as symlinks, preserves device files.
  • H: preserves hard-links
  • A: preserves ACLs