salekseev

#!/bin/bash
# This script will check if there is unallocated space in the volume group
# and will attempt to expand logical volume and file system using resize2fs
# Author: Stas Alekseev <[email protected]>

fs_mount="/var"
vg_minfree_mb="100000"
lv_maxsize_mb="27000"

warn () {

salekseev

#!/bin/bash
index="epriorauth"
date="2016-08-23"
broker="kafka100"
topic="structured_log_all"
kafkacat -b $broker -t $topic -C -o beginning \
  | jq --arg index "$index" --arg date "$date" -cM '{"@timestamp": .["@timestamp"], "@target_index": .["@target_index"]} | select(.["@target_index"]==$index) | select( .["@timestamp"] | startswith($date) )'

salekseev

#!/bin/bash

# repository for snapshots
snapshots_repo="es-snapshots"

# filesystem for snapshots
snapshots_fs="/es-snapshots"

# elasticsearch url
elasticsearch_url="http://esdatafb101.athenahealth.com:9210"

salekseev

#!/bin/bash

# elasticsearch url
elasticsearch_hosts="devesdatasa100.athenahealth.com:9251,devesdatasa101.athenahealth.com:9251,devesdatasa102.athenahealth.com:9251"

port=$(( ((RANDOM<<15)|RANDOM) % 63001 + 2000 ))


function usage()
{

salekseev

diff -Naur spl-0.6.5.8.orig/rpm/generic/spl-dkms.spec.in spl-0.6.5.8/rpm/generic/spl-dkms.spec.in
--- spl-0.6.5.8.orig/rpm/generic/spl-dkms.spec.in       2017-01-23 14:36:09.403082000 -0500
+++ spl-0.6.5.8/rpm/generic/spl-dkms.spec.in    2017-01-23 14:36:23.151812000 -0500
@@ -18,7 +18,7 @@

 Requires:       dkms >= 2.2.0.2
 Requires:       gcc, make, perl
-Requires:       kernel-devel
+Requires:       kernel-uek-devel
 Provides:       %{module}-kmod = %{version}

salekseev

#!/bin/sh
kafkacat -t test -b localhost -u -q | pv -l > /dev/null

salekseev

#!/bin/bash

command -v aws >/dev/null 2>&1 || { echo >&2 "I require awscli but it's not installed.  Aborting."; exit 1; }
command -v curl >/dev/null 2>&1 || { echo >&2 "I require curl but it's not installed.  Aborting."; exit 1; }

# Find local instance_id
INSTANCE_ID=$(curl -s http://169.254.169.254/latest/meta-data/instance-id)

# Find cloudformation stack-id
STACK_ID=$(aws ec2 describe-instances --output text --instance-ids $INSTANCE_ID | grep -e 'TAGS\saws:cloudformation:stack-id' | awk '{print $3}')

salekseev

#!/bin/bash

# enable forwarding
echo 1 >| /proc/sys/net/ipv4/ip_forward

# get softirq sharing between CPU cores for Receive Packet Steering
# https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Performance_Tuning_Guide/network-rps.html
for rxq in $(ls -1 /sys/class/net/*/queues/rx-*/rps_cpus)
do
  echo $(taskset -p 1 | cut -d':' -f2 | tr -d '[:space:]') >| $rxq

salekseev

problem: storing mac address (6 bytes) in rdbms efficiently

options:
char(6)            | long/bigint (8 bytes)  | char(12)
byte array         | decimal representation | hex characters in ascii
---------------------------------------------------------------------
efficiency: n      | efficiency: n+2        | efficiency: n+6
terminal safe: n   | terminal safe: y       | terminal safe: y
human readable: ?  | human readable: y      | human readable: y
range find: custom | range find: builtin    | range find: custom

salekseev

#!/bin/sh
while true
do
  all=""
  for interface in $(dmesg | grep ^eth | grep 802.11 | cut -s -d: -f1)
  do
    # for each interface, get mac addresses of connected stations/clients
    maclist=$(wl -i $interface assoclist | cut -s -d" " -f2 | xargs -n 1 wl -i $interface sta_info | grep STA | cut -s -d" " -f3 | sed 's/.$//')

    # for each mac address in that list...