The_Dev_Crypt

So You want IIS 7.5 – PHP – ASP – MySQL – PHPMyAdmin!

By admin, on June 20th, 2010

Intro

The Obvious question…. Why would you want to do that to yourself? 😆
Well this jotting space is about stuff i was beaten and forced to do. This was a pain to figure out and thought I should try and keep some notes.
I am putting those down a few days after I managed to read-figure out how to do this, so I might be missing some points. There has been a lot of hard work in Cut-Pasting all this so i might have got tiered in the end and missed some of my readings. 😛 Continue reading So You want IIS 7.5 – PHP – ASP – MySQL – PHPMyAdmin!

Boot from an ISO and ruin (or Fix) Your Dedicated Hosting

By admin, on June 15th, 2010

Intro

OK so you went and splashed out on a Dedicated Hosting Pack only to find out you do not like the OS list included. You have IP KVM Access to the Machine and you feel you want to ruin it (OR Fix it). Lets assume you have debian and you want to install ESXi Here is How!
Continue reading Boot from an ISO and ruin (or Fix) Your Dedicated Hosting

IPv6 resources, documents, tutorials and guides

By admin, on June 5th, 2010

Following are some very useful Ipv6 related resources.

Continue reading IPv6 resources, documents, tutorials and guides

802.11n Modulation and Coding Schemes (MCS)

By admin, on May 30th, 2010


MCS Index	Modulation	Rate Code	N_BPSCS(i_SS)	N_SD	N_SP	N_CBPS	N_DBPS	Rate Mb/s @ 20MHz		Rate Mb/s@ 40MHz
				(20MHz/40MHz)	(20MHz/40MHz)	(20MHz/40MHz)	(20MHz/40MHz)	800ns GI	400ns GI	800ns GI	400ns GI

0	BPSK	1/2	1	52/108	4/6	52/108	26/54	6.5	7.2	13.5	15.0
1	QPSK	1/2	2	52/108	4/6	104/216	52/108	13.0	14.4	27.0	30.0
2	QPSK	3/4	2	52/108	4/6	104/216	78/162	19.5	21.7	40.5	45.0
3	16-QAM	1/2	4	52/108	4/6	208/432	104/216	26.0	28.9	54.0	60.0
4	16-QAM	3/4	4	52/108	4/6	208/432	156/324	39.0	43.3	81.0	90.0
5	64-QAM	2/3	6	52/108	4/6	312/648	208//432	52.0	57.8	108.0	120.0
6	64-QAM	3/4	6	52/108	4/6	312/648	234/486	58.5	65.0	121.5	135.0
7	64-QAM	5/6	6	52/108	4/6	312/648	260/540	65.0	72.2	135.0	150.0

8	BPSK	1/2	1	52/108	4/6	104/216	52/108	13.0	14.4	27.0	30.0
9	QPSK	1/2	2	52/108	4/6	208/432	104/216	26.0	28.9	54.0	60.0
10	QPSK	3/5	2	52/108	4/6	208/432	156/324	39.0	43.3	81.0	90.0
11	16-QAM	1/2	4	52/108	4/6	416/864	208/432	52.0	57.8	108.0	120.0
12	16-QAM	3/4	4	52/108	4/6	416/864	312/648	78.0	86.7	162.0	180.0
13	64-QAM	2/3	6	52/108	4/6	624/1296	416/864	104.0	115.6	216.0	240.0
14	64-QAM	3/4	6	52/108	4/6	624/1296	468/972	117.0	130.0	243.0	270.0
15	64-QAM	5/6	6	52/108	4/6	624/1296	520/1080	130.0	144.4	270.0	300.0

16	BPSK	1/2	1	52/108	4/6	156/324	78/162	19.5	21.7	40.5	45.0
17	QPSK	1/2	2	52/108	4/6	312/648	156/324	39.0	43.3	81.0	90.0
18	QPSK	3/5	2	52/108	4/6	312/648	234/486	58.5	65.0	121.5	135.0
19	16-QAM	1/2	4	52/108	4/6	624/1296	312/648	78.0	87.6	162.0	180.0
20	16-QAM	3/4	4	52/108	4/6	624/1296	468/972	117.0	130.0	243.0	270.0
21	64-QAM	2/3	6	52/108	4/6	936/1944	624/1296	156.0	173.3	324.0	360.0
22	64-QAM	3/4	6	52/108	4/6	936/1944	702/1458	175.5	195.0	364.5	405.0
23	64-QAM	5/6	6	52/108	4/6	936/1944	780/1620	195.0	216.7	405.0	450.0

24	BPSK	1/2	1	52/108	4/6	208/432	104/216	26.0	28.9	54.0	60.0
25	QPSK	1/2	2	52/108	4/6	416/864	208/432	52.0	57.8	108.0	120.0
26	QPSK	3/5	2	52/108	4/6	416/864	312/648	78.0	86.7	162.0	180.0
27	16-QAM	1/2	4	52/108	4/6	832/1728	416/864	104.0	115.6	216.0	240.0
28	16-QAM	3/4	4	52/108	4/6	832/1728	624/1296	156.0	173.3	324.0	360.0
29	64-QAM	2/3	6	52/108	4/6	1248/2592	832/1728	208.0	231.1	432.0	480.0
30	64-QAM	3/4	6	52/108	4/6	1248/2592	936/1944	234	260.0	486.0	540.0
31	64-QAM	5/6	6	52/108	4/6	1248/2592	1040/2160	260.0	288.9	540.0	600.0

32	BPSK	1/2	1	NA/48	NA/4	NA/48	NA/24	NA	NA	6.0	6.7

N_BPSCS(i_SS) = Number of coded bits per single carrier

N_SD = Number of data sub-carriers

N_SP = Number of pilot sub-carriers (used for pilot tracking)

N_CBPS = Number of coded bits per OFDM symbol

N_DBPS = Number of data bits per OFDM symbol

MCS 0 – 7 are for 1×1 MIMO (1 spacial stream), MCS 8 – 15 are 2×2 MIMO (2 spacial streams). MCS 16 – 23 are 3×3 MIMO (3 spacial streams) and MCS 24 – 31 are for 4×4 MIMO (4 spacial streams).

Ο vendor are obliged to support MCS 0 – 15 depending on weather they implement 1×1 or 2×2 MIMO at 20MHz. Support for 40MHz and the rest of MCS is optional.

MCS 32 is special for high noise environments and it basically does duplication of data, its BPSK with 1 spacial stream in 40MHz only and with max rate 6.7Mb/s .

MCS 33 – 76 are in unequal modulation of 2 spacial streams upwards, in other words every stream has different modulation (QPSK/QAM), the 33 – 38 has 2 streams (max 108.3Mb/s @ 20MHz, 225Mb/s @ 40MHz), 39 – 52 has 3 streams (max 173,3Mb/s @20MHz, 360Mb/s @ 40MHz) and 53 – 76 has 4 streams (max 238Mb/s @ 20MHz, 495Μb/s @ 40MHz). The purpose is to have flexibility and better adaptivity to environment conditions (all this provided there is in place an advanced rate control algorithm that takes into account many different parameters).

MCS 77 – 127 are reserved.

Continue reading 802.11n Modulation and Coding Schemes (MCS)

Installing the OpenSKS keyserver on Debian like machines

By admin, on April 15th, 2010

I’ve been trying to install a PGP keyserver for some time, then found sks.

It’s in the Ubuntu repositories, so actually installing it is a breeze :

# sudo apt-get install sks

However, configuring it is a little more complicated, here are the steps I took :

Open a terminal window Create the database . . . → Read More: Installing the OpenSKS keyserver on Debian like machines

Do MultiPathing (MPIO) With Equalogic and vSphere

By admin, on March 28th, 2010

Yes this is a very specific subject but hell it is useful if you got a good storage and you want to suck all the throughput from its Interfaces.

In this case I used an EqualLogic PS6000XV Storage Array to set up a VMware vSphere Cluster.

It should be very similar for other storage . . . → Read More: Do MultiPathing (MPIO) With Equalogic and vSphere

Zimbra 5 & 6 on Debian 5 i386

By admin, on March 10th, 2010

Install Debian 5

Zimbra 6

Install required packages

# aptitude install sudo libidn11 libpcre3 libexpat1 libstdc++5 sysstat

Edit the host file

# vi /etc/hosts ip.add.re.ss hostname.domain.tld hostname

Download Zimbra 6

# wget http://…/zcs-6.0…DEBIAN5…tgz

Extract the archive

# tar xzf zcs-6.0…DEBIAN5…tgz

Install Zimbra 6

# ./install Zimbra 5 apt-get install binutils build-essential gcc-4.1-base make psmisc . . . → Read More: Zimbra 5 & 6 on Debian 5 i386

The_Dev_Crypt

So You want IIS 7.5 – PHP – ASP – MySQL – PHPMyAdmin!

Intro

Boot from an ISO and ruin (or Fix) Your Dedicated Hosting

Intro

IPv6 resources, documents, tutorials and guides

802.11n Modulation and Coding Schemes (MCS)

Installing the OpenSKS keyserver on Debian like machines

Do MultiPathing (MPIO) With Equalogic and vSphere

Zimbra 5 & 6 on Debian 5 i386

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