Debian Israel Mirror

Debian Israel mirror updated and synced

MadDog — Sat, 29 Oct 2011 07:44:56 +0000

Our Debian repository mirror has been updated, synced and upgraded. New fresh upstream Debian mirror updated.

New syncing module and fixed indexes.

The mirror is moved to an Apache web server from Lighttpd for better compliance of Debian clients.

lighttpd-1.2.28 with mod_h264 support deb package

MadDog — Thu, 08 Sep 2011 06:10:31 +0000

Hello,

I’ve precompiled a Lighttpd 1.2.28 Debian’s version with mod_h264 (version 2) streaming module support on Squeeze amd64 system.

Ready for use, grab from here

Usage (lighttpd.conf):

server.modules = (
“mod_access”,
“mod_alias”,
“mod_compress”,
“mod_redirect”,
# “mod_rewrite”,
“mod_h264_streaming”,
)
h264-streaming.extensions = ( “.mp4″ )

Tested on Debian Squeeze, using it on production system.

Debian 6.0 “Squeeze” released!

MadDog — Tue, 08 Feb 2011 07:17:41 +0000

Debian 6.0 “Squeeze” released!
Our ISO’s mirror is fully synced with the new Squeeze release.

Packages mirror is ready and might be used.

lighttpd writev

MadDog — Wed, 01 Sep 2010 16:01:06 +0000

I was suffering from performance problem on lighttpd running a http-progressive flv media server on a Sata Seagate Baracuda drive (24×7 server edition).
The bandwidth didn’t pass the 150-160mbit limit and the disk utilization was on 99.9% const.
I found a suggestion on some forum to change the network backend to ‘writev’ (which is good for large files serving) and walla the bandwidth just jumped up by 150% to 220-240mbit/sec.

While the disk utilization (checked by iostat) is around 81-90% only.

To set ‘writev’ on lighttpd, edit lighttpd.conf and put this:

server.network-backend = “writev”

again this might not help everybody, but it worth a test.

Israel Centos Mirror

MadDog — Sun, 06 Jun 2010 13:06:49 +0000

New Israel centos mirror announcement.

This mirror synced twice a day and contains all Centos Packages and ISOs.

new Israeli php mirror!

MadDog — Mon, 17 May 2010 13:11:23 +0000

i want to introduce the new Israeli PHP mirror which is available for your free use, enjoy!

lighttpd dir-generator-plus.php

MadDog — Fri, 30 Apr 2010 05:56:28 +0000

I’ve patched a little bit the wonderful dir list generator from Evan Fosmark, i’ve added ability to add hidden files list which you would like to hide from being displayed.

For instance you don’t want to show the dir-generator-plus.php file and the included folder images directory; I also include footers sometimes so i prefer to them as well.

download it dir-generator-plus.php

The usage is simple, edit your lighttpd.conf file at the host area:

dir-listing.activate = "enable"

index-file.names = ( "/dir-generator.php" )

for more info about the usage of Lighttpd dir listing please visit the lighttpd wiki

easy turn on ls colors for root

MadDog — Thu, 22 Apr 2010 07:09:27 +0000

in order to turn on the ls colors on your debian server for root user, just edit the /root/.bashrc file and uncomment there the following lines:
export LS_OPTIONS=’–color=auto’
eval “`dircolors`”
alias ls=’ls $LS_OPTIONS’

save and apply the new settings:

source ~/.bashrc

that’s all

tunning swappiness

MadDog — Tue, 09 Mar 2010 08:18:16 +0000

if you want Linux machine to use less swap you can tune it by changing the value of:

/proc/sys/vm/swappiness

by default it’s set to ’60′, you can decrease it to make it use less swap memory, this means that swap memory will be more used “when needed only”.

Change the value using this command:

echo 30 > /proc/sys/vm/swappiness

howto: check disk utilization

MadDog — Mon, 07 Dec 2009 08:59:11 +0000

Disk IO and usage can be checked very easily via ssh, currently the bandwidth usage is 82mbit. IO wait can be checked using the ‘vmstat 1‘ command and looking on the pre-last column called ‘wa’:

procs ———–memory———- —swap– —–io—- –system– —–cpu——

r b   swpd   free   buff cache   si   so    bi    bo   in   cs us sy id wa st

1 1    476 8209760 17060 6923844    0    0   550    22    1    0 10 6 78 7 0

2 2    476 8176176 17152 6934184    0    0 5552     0 7435 2960 26 5 61 8 0

2 0    476 8198232 17160 6938080    0    0 2788     0 6260 2412 14 2 83 1 0

1 1    476 8189900 17184 6947160    0    0 3500     0 7751 2857 22 3 72 3 0

2 0    476 8147572 17192 6963164    0    0 3188   264 10083 3223 24 4 69 3 0

1 0    476 8171132 17208 6966848    0    0 2924     0 5948 2234 18 2 78 2 0

1 1    476 8166708 17220 6972064    0    0 1960     0 6731 2774 15 3 80 2 0

2 1    476 8133964 17236 6982200    0    0 3164     0 8228 3292 18 5 73 4 0

1 0    476 8128256 17252 6986012    0    0 3716     0 5876 2995 21 12 65 3 0

1 2    476 8102740 17336 6990420    0    0 2420   636 6364 3884 22 12 59 8 0

As you can see, its varies from 0-8 which is normal, when IO more than 20-30 for long time means IO is in moderate usage, when its over 50 it is high.

Another command to check disk utilization is ‘iostat –dx 5‘, it calculates 5 seconds disk resources utilization:

Device:         rrqm/s   wrqm/s   r/s   w/s   rsec/s   wsec/s avgrq-sz avgqu-sz   await svctm %util

sda              18.60     9.80 114.00 8.00 8777.60   142.40    73.11     1.65   13.78   5.44 66.32

sda1              0.00     0.00 0.00 0.00     0.00     0.00     0.00     0.00    0.00   0.00   0.00

sda2             18.60     9.80 114.00 8.00 8777.60   142.40    73.11     1.65   13.78   5.44 66.32

dm-0              0.00     0.00 131.80 17.80 8696.00   142.40    59.08     1.95   13.27   4.43 66.34

dm-1              0.00     0.00 0.00 0.00     0.00     0.00     0.00     0.00    0.00   0.00   0.00

Device:         rrqm/s   wrqm/s   r/s   w/s   rsec/s   wsec/s avgrq-sz avgqu-sz   await svctm %util

sda              27.40     5.00 110.20 7.20 8624.00    97.60    74.29     2.06   17.53   5.88 69.02

sda1              0.00     0.00 0.00 0.00     0.00     0.00     0.00     0.00    0.00   0.00   0.00

sda2             27.40     5.00 110.20 7.20 8624.00    97.60    74.29     2.06   17.53   5.88 69.02

dm-0              0.00     0.00 138.40 12.20 8648.00    97.60    58.07     2.96   19.65   4.58 69.00

dm-1              0.00     0.00 0.00 0.00     0.00     0.00     0.00     0.00    0.00   0.00   0.00

Device:         rrqm/s   wrqm/s   r/s   w/s   rsec/s   wsec/s avgrq-sz avgqu-sz   await svctm %util

sda              21.16     5.79 122.36 6.39 9203.99    97.41    72.25     1.88   14.63   5.23 67.33

sda1              0.00     0.00 0.00 0.00     0.00     0.00     0.00     0.00    0.00   0.00   0.00

sda2             21.16     5.79 122.36 6.39 9203.99    97.41    72.25     1.88   14.63   5.23 67.33

dm-0              0.00     0.00 142.71 12.18 9180.04    97.41    59.90     2.36   15.25   4.35 67.31

dm-1              0.00     0.00 0.00 0.00     0.00     0.00     0.00     0.00    0.00   0.00   0.00

the last column says about 57-65% utilization of the disks, which is normal at 100mbit (the current bandwidth is 100mbit now).

Another test can be done at rush hours to check the utilization, usually SATA disks in RAID 1 configuration can handle 150-250mbit (depends on number of concurrent connections).