This website is the result of the merge of all my personal websites: Kirys Tech 2000 (kt2k.com), kirys.it, kirys.no-ip.org. It does contain's two blogs one in english and the other in italian where i share my thoughts on software, developing, information security and technology.

Disconnected from the cloud

12 February 2017

I had a network outage at home from the 1st of February till the 11th, it was a long period (the longest since at least 2010), and this event make me think about how much we depend on internet and on the cloud for so many things.

Luckily most of my home systems don’t need cloud services to work (as an example I use ownCloud for files sync and mercurial for code versioning on a server at home) but of course I could not watch netflix or downloads games from psn and I had only the mobile for news sites and casual browsing (and I almost depleted the bandwidth).

But I was thinking of those people that buy systems that highly depends on cloud to work (there are also lamps that needs the cloud to be turned on and off!), what will happen during an outage?

Internet become a service we depend on like electricity, and it does rely on standards that allow to replace a provider with another quite easily.

On the other end most cloud services are not based on standards so is not trivial to move from one to another, of course many of them provide some exports functionalities but yet again not based on any standard so you don’t see as much import functionalities. There are of course exceptions: for services like dropbox, is just a matter of moving files from a directory to another (losing history thought) but most are not as easy.

Lets return to the cloud lamps, if the company that provides the service cease operation the lights will stop woking and you have to replace them all, and what if all your house lights are based on it? You will be left alone in the dark…​

The cloud is a valuable resource but also a risk due to lack of standards and security/privacy concerns, I’m not saying that people should avoid it but I think that we should all be aware of related risks.

Bye

K.

Propositions for 2017

30 December 2016

2016 is coming to an end, and my proposition for the 2017 is I have to take again this blog to share my thoughts about technology and computer security.

For now I’ve started with a small reorganization of the website, introduced tags and joined news and English blog. Not much but it’s a start.

Happy new year to everyone.

Bye

K.

Let's Encrypt

09 July 2016

Let's Encrypt

This website is composed only of static files but nevertheless I’ve decidiced to go full https thanks to Let’s Encrypt

jBaking a new website

06 March 2016

Finally I’ve started to rebuild the website (again) from scratch.

The truth is that I abbandoned it in 2013 due to lack of time, and till today all the time I’ve spent on it was spent for drupal mainenance. So I decided to drop dupal and move to something that required little effor for mainenance.

My choice went to jBake that generate a static website, that have not need for patching or similar security mainenance. Another advantage of jBake is that uses a template system common in JEE world that I already know.

Just a final note: Drupal is a really good platform, but it is just too powerful for a simple website like this is now.

Querying Job status on SQL Server 2005 without using OPENROWSET

11 June 2014

Where I work the main DB engine is SQL Server 2005, today we had to find a way to check the status of a job started from a stored procedure (following this tutorial).

The tutorial show the usage of OPENROWSET for checking the job status, but for many reasons we could not use that function in our environment so we had to find another way

After many experiments I've written a query that could replace the OPENROWSET without incurring in the "nesting problem" of calling sp_help_job directly.

declare @CurrentJobs table
(
[Job ID] uniqueidentifier,
[Last Run Date] varchar(255),
[Last Run Time] varchar(255),
[Next Run Date] varchar(255),
[Next Run Time] varchar(255),
[Next Run Schedule ID] varchar(255),
[Requested To Run] varchar(255),
[Request Source] varchar(255),
[Request Source ID] varchar(255),
[Running] varchar(255),
[Current Step] varchar(255),
[Current Retry Attempt] varchar(255),
[State] varchar(255)
)
insert into @CurrentJobs
EXECUTE master.dbo.xp_sqlagent_enum_jobs 1,''

select *
from @CurrentJobs cj 
join msdb.dbo.sysjobs sj on cj.[Job ID]= sj.job_id
OUTER APPLY
        (
        SELECT  TOP 1 *
        FROM    msdb.dbo.sysjobhistory hj
        WHERE   cj.[Job ID]= hj.job_id
        ORDER BY
                [run_date] DESC, [run_time] DESC
        ) h
WHERE name='my_job_name'

Hope someone could find this useful

Bye
Kirys

Pass the same params to all drives of a Linux mdraid

09 May 2014

I have two raids on my home server, one of them is used just as a backup staging area.

So I wanted to set all disks that compose that raid with higher power saving settings.

The result is this simple script


#!/bin/bash
mdadm --detail $1 | grep -o /dev/sd. |xargs hdparm ${@:2}

It make no checks but it gets the job done.

Bye

K.

A new home server

31 March 2013

At home I've a server that I use for file serving, developing and making experiments but it is really old, has no virtualizzation support built'in (I'm using virtualbox but it is desktop oriented and I need something more oriented to server), and the available HDD space is almost out of space.

So my requirements list is:

  • at least 4Tb of raid protected hdd space
  • low power consumptions on idle (at least no higher than current setup)
  • lowest possible noise
  • full HW virtualizzation support
  • two gigabit Ethernet cards
  • full centos 6 compatible (that is the hardest part)

It was not easy, expecially the noise requirement since that information seldom provided into the hw specifications, my main source for this kind of info is Silent pc review but you can sill have bad suprises.

My current server configuration has 3 HDDs (raid 5) + a 2Tb hdd for "slow changing data" and an ssd for booting.

To achieve larger capacity and lower consumption I decided to use only 2.5 hdds. This is a setup that is now also common for enterprise servers, obviously I don't want to buy enterprise grade 2.5 HDDs (those are pricey) and this will also need a proper backplane for assure a good heat dissipation (so no plastic case).

I've selected the Samsung Spinpoint M8 1T hdd the spinpoint series was always a silent one so I've ordered a sample and make some tests, the result into an usb box was quite satisfactory. To reach the 4tb size in raid 5 i need 5 HDDs, so to have those plus the boot SSD I needed a MB with at least 6 sata ports.

 

Another important subject was the CPU, this is not a gaming PC, I just want to host some virtual guest for making clustering experiments so two physical core should be enough and power consumption have to be as low as possibile. This seemed simple but I soon discovered that there are not many low power consumption desktop cpus.

After a long research I found two candidates:

I have to admit that i liked the idea of using the E3 expecially due to the ECC memory support but I was unable to find a MB that officially supported that (and was compliant to my other requirements) so I had to buy the i5.

 

Happy Easter

31 March 2013

Happy Easter to all

Migration of the content still in progress

10 March 2013

Most of the content has been migrated, and reorganized.During the process I've lost all the tags of the old posts, but this is a minor issue for me cause this site needs new content ;)

Now i need to decide the best way to use Drupal for my projects

Cya K.

Migration to drupal in progress

03 March 2013

Joomla 1.5 is in end of life, so I had to migrate to a new product. Joomla is really nice but I've found myself to like Drupal much more so I've started the migration. It'll take some time to complete.

Tweeter....

15 January 2012

Google removed the share functionality of Google Reader to push Google+, I'm really upset by this choice cause I used that functionality for sharing news and articles that I thought were interesting on this website.
Today I've thought that twitter could be a effective replacement for it, so from now onward I'll be a twitter user too.

Cya
K.

Rilego status report

13 May 2011

The first steps of the Rilego project are done, most of the features of JE-Comics are completely ported to Rilego 0.4.0 plus the multi-threading engine is active.

Now before continuing adding new features (the next feature planned is ePub output support) I need to consolidate the code (clean up, adding comments, and bug fixes).

Meanwhile I hope to get some testers soon ;)

Bye

K.

Is Microsoft going to buy Skype?

10 May 2011

There are rumors that Microsoft is about to buying skype for $7bn, my only worry is that this could mean the end of Linux support (like it happened before).

Let's hope for the best

Cya

K.

Rilego Downloads

09 May 2011

Rilego Downloads Page

{loadposition RilegoDownloads}

Rilego v0.4.0 Alpha Released

08 May 2011

One of the most requested features for JE-Comics was multi-threading but due to its architecture it cannot have it but now Rilego does!

You can grab it at project download page

v0.4.0 Alpha

  • MAJOR: Multi-threading support.
  • GUI-MINOR: Split mode selection is now a Combo Box.
  • GUI-FIX: Now the gui uses Split Mode selection.

 

 

Rilego v0.3.0 Alpha released

29 April 2011

Here we are this should be the first "working" release.

You can grab it here

Here is the release history

v0.3.0 Alpha

  • MAJOR: Added the Sharpen filter.
  • MAJOR: Added the Smart Smooth filter.
  • MINOR: Saving document title and author.
  • GUI-MAJOR:  Ability to mass set source properties.
  • LIB-MAJOR:  Now using ImageInfo by Marco Schmidt for getting info on images this fixes some issues with some images format.
  • LIB-MINOR:  Added some better error reporting to the builder using exceptions.

 


Older posts are available in the archive.