As I mentioned in my earlier post that I had a good experience with Udemy’s online course while preparing for AWS Certified Solutions Architect – Associate exam.
So for preparation of Architecting Microsoft Azure Solutions Certification also I wanted to buy an online course.
When I started my search for a suitable course I zeroed in on Architecting Microsoft Azure Solutions Certification course by Scott Duffy on Udemy.
Scott himself is a certified architect and got a rich industry experience. Going through the course content I found that it covered almost all exam topics. Also Scott keeps on updating the content as the syllabus changes. And if you buy from Udemy you get free life time access to the course so I went with this one.
Now coming to the course.
After buying the course as I went through it I found the content to be good but the content delivery of Scott is not as good as Ryan of acloudguru whose AWS course I have completed.
Scott mixes many Developer course topics with this course which can be good if you are from development background but not essential for the exam. For the exam you need the basic understanding of coding so that you can read and understand the code.
Course has many quizzes after the modules which are helpful in testing what you have learnt. It covers hands on exercises which you can follow in your own MS Azure free trial account.
It has mock exam at the end of sections but when I gave them I found that no matter how many times you give the mock exam it reflects the same score that you got when you appeared for the mock exam first time. I informed Scott about this on the forum page and he said he will get it sorted. Hope it’s fixed now.
Overall this course covers most of the exam topics and if you are a beginner in Azure it will give you a good base. Also as of Apr-18 this is the only course on Udemy which covers most topic and get you exam ready.
If you already have background in AWS then I recommend that you also go through the course Microsoft Azure for AWS Experts by Microsoft(Update: This is now a paid course). Few of the Azure terminologies are confusing and if you relate them to AWS it will help you understand them quickly. You can also refer to our post where we have compared the services of AWS vs Azure .
Read the post Azure exam pattern to know more about what’s asked in exam. You can supplement your preparation with sample exam questions by Scott.
Scott also got a good course on 70-533 Implementing Microsoft Azure Infrastructure Solutions .
Do share your queries or opinion with us.
Parallel Patching in Solaris 10
When you patch a Solaris 10 server it applies each patch to each zone one-at-a-time . So if you have 3 zones and it takes 1 minute to apply a patch on global zone then it will take another 1 minute each to apply on other 3 zones. Thus in total you will be spending around 4 minutes to apply single patch on the server. You can imagine the time it will take to apply a 300 patches bundle.
From Solaris 10 10/09 onward you have got an option to patch multiple zones in parallel.
(For releases prior to Solaris 10 10/09, this feature is delivered in the patch utilities patch, 119254-66 or later revision (SPARC) and 119255-66 or later revision (x86). Check latest patch on My Oracle Support Website)
Parallel patching is really helpful as it will apply patches in parallel to all the zones. So all your zones on a server will be patched at the same time thus drastically reducing your patching time. If we consider the above scenario if we use parallel patching, the total patching time for applying the patch in all zones can reduce to around 2 to 2.5 minutes. As global zone will still be patched first and then the patch will be applied on local zones in parallel.
The number of global zones that can be patched together is decided by a parameter num_proc= which is defined in /etc/patch/pdo.conf .
The value for num_proc= is decided based on number of online CPUs in your system. The maximum number is 1.5 times the number of online CPUs.
For example :-
If number of online CPUs is 6
In /etc/patch/pdo.conf make the entry
So just update the num_proc value in /etc/patch/pdo.conf as per the available CPUs in your system and enjoy some free time 🙂
Note:- The time estimate I mentioned above are as per my own experience and I have not maintained any data for this. So please expect variations in time as per your system.
Do let me know if you have any query.
From Solaris 10 10/09 onward you have got an option to patch multiple zones in parallel.
(For releases prior to Solaris 10 10/09, this feature is delivered in the patch utilities patch, 119254-66 or later revision (SPARC) and 119255-66 or later revision (x86). Check latest patch on My Oracle Support Website)
Parallel patching is really helpful as it will apply patches in parallel to all the zones. So all your zones on a server will be patched at the same time thus drastically reducing your patching time. If we consider the above scenario if we use parallel patching, the total patching time for applying the patch in all zones can reduce to around 2 to 2.5 minutes. As global zone will still be patched first and then the patch will be applied on local zones in parallel.
The number of global zones that can be patched together is decided by a parameter num_proc= which is defined in /etc/patch/pdo.conf .
The value for num_proc= is decided based on number of online CPUs in your system. The maximum number is 1.5 times the number of online CPUs.
For example :-
If number of online CPUs is 6
In /etc/patch/pdo.conf make the entry
num_proc=9Thus as per above example 9 zones can be patched in parallel. This will reduce lot of downtime if you have 9 zones running in a server. Once the entry in pdo.conf is done you can continue with normal patching process.
So just update the num_proc value in /etc/patch/pdo.conf as per the available CPUs in your system and enjoy some free time 🙂
Note:- The time estimate I mentioned above are as per my own experience and I have not maintained any data for this. So please expect variations in time as per your system.
Do let me know if you have any query.
Review of acloudguru course AWS Certified Solutions Architect –Associate
In this post we are writing a review of acloudguru course AWS Certified Solutions Architect – Associate on Udemy .
When I decided to go for AWS Certified Solutions Architect – Associate exam I was confused about how to start with preparation. Syllabus of the exam is vast and covers a lot of topics. I needed someone to guide me for this exam.
After going through many forums I came to the conclusion that I’ve two options.
Linux Academy has good material and people have written some good feedback for them. But the problem with them is that you have to buy their monthly subscription with plans starting from $29. I knew that with a full-time job I won’t be able to complete the course properly in 1 month.
So I checked on acloudguru course. Many people have given good feedback for this course too. The course was listed on acloud.guru website for $29. But I found the same course on Udemy for $10 in a special offer at that time. Udemy also provides you free lifetime access to the course. I found this was most suitable for me so purchased it. Also once you buy the course from Udemy you can get free access to the same course on acloud.guru website also.
Now coming to the acloudguru AWS Certified Solutions Architect – Associate
course itself.
As of Apr-2018 course has around 22 hours of on-demand video.
The course is very comprehensive and it gives you a good understanding of topics. Instructor(Ryan) is very energetic and he tries to teach you the topic in a very simple way. So even if you don’t have background in AWS then also you will understand the topics with not much effort.
It covers a lot of practical labs which you can follow by creating your own AWS free tier account. It covers almost all topics of the exam. So you don’t have to worry about the syllabus.
It also has quizzes in between the course for knowledge check and also full length mock exams to test your understanding.
One of the recommendation for the exam preparation is to go through the white papers. Each of the white paper is a big pdf of 50 to 200 pages. And for the associate level you are supposed to read around 6 to 7 of them. This can be overwhelming but Ryan cover the gist of these whitepapers in his course.
The course is very useful to get you started on the AWS journey. But the course alone is not enough to clear the exam. You need to have good practical knowledge of AWS for clearing the exam and this course give you the correct direction.
You can get good sample exam questions for practice from another course of acloudguru on Udemy Exam Questions – AWS Solution Architect Associate or from Jon AWS Certified Solutions Architect Associate Practice Exams for which most students have written great feedback.
When I decided to go for AWS Certified Solutions Architect – Associate exam I was confused about how to start with preparation. Syllabus of the exam is vast and covers a lot of topics. I needed someone to guide me for this exam.
After going through many forums I came to the conclusion that I’ve two options.
- To attend the course at one of the training institutes. The official training cost range from $800 to $1500. Even the institutes offering non-official training quoted $400 to $900. This was huge money considering that my last company was not sponsoring this course and I have to pay for it myself.
- Second option was to look for online courses. These course are cheap ranging from $10 to $100 but I was not sure about the quality of content and how much I can learn with just online training.
Linux Academy has good material and people have written some good feedback for them. But the problem with them is that you have to buy their monthly subscription with plans starting from $29. I knew that with a full-time job I won’t be able to complete the course properly in 1 month.
So I checked on acloudguru course. Many people have given good feedback for this course too. The course was listed on acloud.guru website for $29. But I found the same course on Udemy for $10 in a special offer at that time. Udemy also provides you free lifetime access to the course. I found this was most suitable for me so purchased it. Also once you buy the course from Udemy you can get free access to the same course on acloud.guru website also.
Now coming to the acloudguru AWS Certified Solutions Architect – Associate
As of Apr-2018 course has around 22 hours of on-demand video.
The course is very comprehensive and it gives you a good understanding of topics. Instructor(Ryan) is very energetic and he tries to teach you the topic in a very simple way. So even if you don’t have background in AWS then also you will understand the topics with not much effort.
It covers a lot of practical labs which you can follow by creating your own AWS free tier account. It covers almost all topics of the exam. So you don’t have to worry about the syllabus.
It also has quizzes in between the course for knowledge check and also full length mock exams to test your understanding.
One of the recommendation for the exam preparation is to go through the white papers. Each of the white paper is a big pdf of 50 to 200 pages. And for the associate level you are supposed to read around 6 to 7 of them. This can be overwhelming but Ryan cover the gist of these whitepapers in his course.
The course is very useful to get you started on the AWS journey. But the course alone is not enough to clear the exam. You need to have good practical knowledge of AWS for clearing the exam and this course give you the correct direction.
You can get good sample exam questions for practice from another course of acloudguru on Udemy Exam Questions – AWS Solution Architect Associate or from Jon AWS Certified Solutions Architect Associate Practice Exams for which most students have written great feedback.
Solved: How to plumb IP in a Solaris zone without reboot
In this post we will discuss how to add an IP to a running Solaris zone.
If you want to add a new IP address to a running local zone(zcldvds01) you can do it by plumbing the IP manually from the global zone.
root@cldvds-global()# ifconfig aggr1:2 plumb root@cldvds-global()# ifconfig aggr1:2 inet 10.248.3.167 netmask 255.255.255.0 broadcast 10.248.3.255 zone zcldvds01 up
This change is not persistent across reboot. To make it permanent you will have to make an entry through zonecfg:-
root@cldvds-global()# zonecfg -z zcldvds01 zonecfg:zcldvds01> add net zonecfg:zcldvds01:net> set physical=aggr1 zonecfg:zcldvds01:net> set address=10.248.3.167 zonecfg:zcldvds01:net> end zonecfg:zcldvds01> verify zonecfg:zcldvds01> commit zonecfg:zcldvds01> exit
Now if you run "ifconfig -a" in the zone. You should see the new IP plumbed.
Change IP in zone
If you want to change the IP address of a zone you can simply do it by using "remove". If we take above example and we want to change IP from 10.248.3.167 to 10.248.3.175 we will do as below:-
root@cldvds-global()# zonecfg -z zcldvds01 zonecfg:zcldvds01> remove net address=10.248.3.167 zonecfg:zcldvds01> add net zonecfg:zcldvds01:net> set physical=aggr1 zonecfg:zcldvds01:net> set address=10.248.3.175 zonecfg:zcldvds01:net> end zonecfg:zcldvds01> verify zonecfg:zcldvds01> commit zonecfg:zcldvds01> exit
Solved: How to grow or extend ZFS filesystem in Solaris 10
Below are the steps to grow a zfs filesystem
- Identify the zpool of the zfs filesystem.
df -h | grep -i sagufs df -Z | grep -i sagufsAbove command will give you the complete path of the filesystem and zpool name even if it's in zone.
- Check that the pool doesn't have any errors.
root# zpool status sagu-zpool pool: sagu-zpool state: ONLINE scan: none requested config: NAME STATE READ WRITE CKSUM sagu-zpool ONLINE 0 0 0 c0t911602657A702A0004D339BDCF15E111d0 ONLINE 0 0 0 c0t911602657A702A00BE158E94CF15E111d0 ONLINE 0 0 0 c0t911602657A702A004CD071A9CF15E111d0 ONLINE 0 0 0 errors: No known data errors
- Check the current size of the pool
root# zpool list sagu-zpool NAME SIZE ALLOC FREE CAP HEALTH ALTROOT sagu-zpool 249G 178G 71.1G 71% ONLINE -
- Label the new LUN.
root# format c0t9007538111C02A004E73B39A155BE211d0
- Add the LUN to appropriate zpool. Be careful about pool name.
root# zpool add sagu-zpool c0t9007538111C02A004E73B39A155BE211d0
- Now let's say we want to increase the filesystem from 100GB to 155GB. To increase FS first increase its quota.
root# zfs set quota=155G sagu-zpool/sagufs
- Finally increase the FS reservation
root# zfs set reservation=155G sagu-zpool/sagufs
- Now you should be able to see the increased space.
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