I have been really busy and not posting much, but I have my home lab pretty much built out and have a bunch of new projects in the hopper, more on that in future posts.  If you have FIOS like I do you probably have a Actiontec router provided by Verizon.  When building out my home lab I wanted to use my Actiontec router as my DNS server, for obvious reasons, the web interface became frustrating pretty quickly.  So many clicks and the ability to only enter a single host registration at a time:

The ability to edit DNS from telnet is actually really nice on the Action tech router.  Commands are petty simple.

1) Enable Telnet on the router (Advanced –> Local Administration)

2) Once telnet is enabled, you can now telnet to your router using the same credentials used with the web interface.

3) After the telnet session is established there are basically three commands you need to be familiar with:

• dns_get:  lists all DNS server entries
• dns_set:  adds a DNS entry
• dns_del:  deletes a dns entry

The syntax is pretty simple:

• dns_get:  used by itself to list all DNS entries
• dns_set: dns_set ID HOSTNAME IP_ADDRESS (e.g. – dns_set 1 host1 192.168.1.100)
• dns_del:  dns_del ID (e.g. – dns_del 1)

This method of adding and removing DNS entries from the Actiontec router is significantly faster than using the web interface.

I use a Google Doc spreadsheet to track my IPs and build the command to add and remove DNS entries.  I have shared my template here:  https://docs.google.com/spreadsheet/ccc?key=0Alfr2Qqx-moWdE43YTFZLVRtRWM1X3VsdXY2UmFBVUE

I have tested a ton of tabbed remote connection tools.

RDTabs (http://www.avianwaves.com/tech/tools/rdtabs/):  Like it for pure RDP, no SSH, http, etc…

Terminals (http://terminals.codeplex.com/):  Slow and a little buggy IMO

Remote Desktop Manager (http://devolutions.net/):  Over built app, not portable, etc…

I am now using mRemoteNG (http://www.mremoteng.org/):  Love it!

This fits all my needs.  Supports all the protocols that I require, no install portable version available which is perfect for me.  I have the portable version in my dropbox (http://www.dropbox.com/) folder so I can launch on any machine and have all my connections readily available.  I can add connections anywhere and they sync’d via  dropbox.  The perfect solution for me.  The app is light weight and fast, give it a try.

So this may seem like a strange post, as most people will think that I am going to be talking about a an IDE application, a RAD tool, a CRM application or some sort of text-to-speech processor, regardless of what you are expecting I can almost guarantee you will be expecting something a little more sexy than what you are about to see (especially if you are not a parent).

I think this app is so useful I am not only posting to my appoftheday.org blog but also to my gotitsolutions.org blog because it is that good.

Let me provide some background.  I have two wonderful little girls, a 5 year old and a 6 month old, for anyone with children we all we have retooled the human machined (ourselves) to have a CPU that is focused on work and coprocessor that deals with our children while we try to focus (we can flip this paradigm as well).  I have to say my time slicing skills are second to none, you learn how to work in 2 min slices while breaking away for 30 seconds to lend some CPU cycles to an often overheating parental coprocessor.  I often read emails back later that had the same thought double typed, missing words, etc… this is because I am processing too much information, my mental programming is way off.  I have this huge array of things I need to do, things I am doing, things I am being told to do, things my kids want to do, yadda, yadda, yadda…. Let’s just say that the that I often suffer pointer corruption which leads to memory leaks, corruption and eventually a segmentation fault (in non techie lingo this is know as a freak out, but this is a technical blog hence the techie speak).

So to the point of the post.  There is this brilliant lady named Julie Aigner-Clark the founder of The Baby Einstein Company, absolute best videos for kids under the age of one to help cool down the coprocessor (why didn’t I start filming shiny lights and hand puppets 10 years ago).  My 5 year old will even watch the videos.  There is this great website site called YouTube where you can find Baby Einstein videos as well as other great videos like Oswald, WordGirl, Hannah Montana and The Pink Panther (a few of my older daughters favorites) So you are probably asking what relevance does this have.  I will explain, be patient, I know how difficult this probably is because you 6 month old wants to eat and your 5 year old wants you to “Play Barbies” with her.

I am in my office trying to work and my daughter comes in, she wants me to stop what I am doing to play with her, I attempt to stall and concentrate at the same time (very difficult).  I eventually sit her on my lap (applies to 6 month old and 5 year old) and open YouTube in my browser and start playing our favorite Baby Einstein or WordGirl video.  Good so far.  I pop out the video window from youtube.com and resize my excel sheet and attempt to work, here is a screen shot of what I am left with:

So on the left my daughter(s) can sit on my lap and watch the vide while I work on the spreadsheet on the right.  Now here is the issue, I only have 3/4 of the screen which can be a little annoying, if I need to use another app it can be a big issue.  So what is the effect of me switching windows:

Oh no, the video moved to the background, scramble to resize the browser window to avoid a complete meltdown.  Reflexes are not that good so I rarely accomplish the goal.

Now for the introduction of a must have application that dramatically improves productivity, focus and sanity.  The app is called DeskPins and simply it allows you to pin any window to the foreground so lets look at a couple of examples of how I use this.

I follow the same process as before with finding a video on YouTube, popping out the video windows but now I pin the video window to the foreground.

Now I can maximize my spreadsheet (far better) and without the video moving to the background, I can move the video window around as needed.  I can open FireFox and not worry about losing the video to the background.

The app works on 32 and 64 bit versions of Windows (I am running on 32 bit XP, 32 bit Win 7 and 64 bit Win 7) and has become an invaluable tool for me.  Hopefully this post helps with some use case examples and helps other parents occupy their children in times of need.  Enjoy!

Got in yesterday (6/28/2010) and planned to attend an afternoon session but I got hung up on a few items that required my attention.  Attendance looks pretty good, food was a bit weak this AM but I am more of a coffee only person in the morning so not a huge deal for me.  Internet connectivity is stellar thus far hopefully this keeps up.  Looking forward to the sessions this week, I am starting the week with a session on entitled Mastering IP Subnetting Forever.  I will be blogging as always from the sessions I attend.  TTFN

Avamar DS18 = Utility Node + Spare Node + 16 Active Data Nodes

For a 3.3. TB Gen-3 Grid

• Raw Capacity ~102 TB
• Spare Node ~6 TB
• RAID5 ~15 TB
• Checkpoint  / GC ~28 TB
• RAIN ~3 TB
• Available for Active Backups ~49 TB

RAID Configuration:

• RAID 1 for 3.3 TB node
• RAID 5 for 2 TB nodes
• RAID 1 for 1 TB nodes

How to calculate the required capacity:

• Seed (Initial backups)
  Daily Change * Rentention in Days
  +RAIN = GSAN Utilization

 

• Need min available space for 4 checkpoints
• 3 checkpoints maintained by default

Data Gathering

Note:  Agent only vs. data store depends on the desired RPO

• xfer_rate = Gb/hr * .70
• date_size = total of the data set to be backed up
• restore_time = data_size x .65 / xfer_rate

If RTO < restore_rate then data store else agent only

Always use 3.3 TB nodes when configuring unless additional nodes are required to increase the ingestion rate.

Use the default de-dupe rate unless a POC or assessment has been performed.

Sizing Considerations:

• Data Types
• File Systems
• Databases
• Large Clients > 2 TB
• Dense File Systems (excluding EMC Celerra and NetApp)
• Organic Growth
• RTO
• Replication Window
• Maintenance Window

Non-RAIN node must be replicated this includes single node Avamar deployments and 1×2 (1 utility node and 2 data store nodes – this is non-RAIN config) configurations.

**** Remember this: As a general rule it seems that transactional databases are better suited to be backed up to Data Domain and NOT with the Avamar as the hashing of databases is generally very slow.

VMware (specifically using the VMware Storage APIs) and CIFS are well suited for Avamar

Data save rates:

• 100 – 150 GB/hr per avtar stream on latest server types
• Note:  it is possible to launch multiple avtar daemons with some tweaking, but an out of the box install only launches a single avtar process.
• VMguest backups can be slower (very scientific, these are backups that
• Default assumption is chuck-compress-hash process runs at a rate of 100 GB/hr
• This is the process that bottlenecks database backups (ideally is seems that the avtar stream rate should match the check-compress-hash process)

Scan rate:

• ~ 1 million files per hour
• 1 TB of file data will take about 1 hour to backup
• 1 TB DB will take ~ 10 hours to complete

Performance:

• 1 TB/hr per node in the grid (all file data)
• 80% file (800 GB file) and 20% DB (200 GB DB) and the performance level drops off to .5 TB/hr
• E.g. – DS18 perf will be ~ 15-16 TB/hr
• Per node ingest rate ~ 8GB/hr

Restores:

Data Fetch Process

• Per node assumption
• Chuck size 24kb
• each chunk is referenced in a hash index stripe
• Speed:
• 5 MB/s
• 18 GB/hr (compressed chunk)
• 25 GB/hr (rehydrated chunk)
• E.g. – A DS18 will restore at a rate of .5 TB/hr

NDMP Sizing:

• Size of the NDMP data set
• Type of filer (Celerra or NetApp)
• Number of volumes, file systems, qtrees
• Size of volumes
• Number of files per volume / file system

L-0 Fulls on happen once (we don’t want to size for them)

Size for L-1 incremental which will happen in perpetuity following the completion of the L-0 full.

• Important L-1 sizing data
• Number of files in the L-1 backup
• Backup window

2 Accelerator Nodes

Config	Max Files		Max Data		Max Streams
	Celerra	NetApp	Celerra	NetApp	Celerra	NetApp
6 GB	5 m	30 m	4-6 TB	4-6 TB	1-2	1-2
36 GB	40 m	60 m	8-12 TB	8-12 TB	4	4

NDMP throughput ~ 100 – 150 TB/hr

Assumed DeDupe Rates:

• File data
• Initial backup:  70% commonality (30% of the data is unique)
• e.g. – 30% of 10 TB = 3 TB stored
• Subsequent backups:  .3% daily change
• e.g. – .3% of 10 TB = 30 GB stored per day
• Database data
• Initial backup:  35% commonality (65% of the data is unique)
• e.g. – 65% of 10 TB = 6.5 TB stored
• Subsequent backups:  4% daily change
• e.g. – 4% of 10 TB = 400 GB stored per day

Tip:  Based on scan rate and the amount of data stored for DB backups you can see why Avamar may not be the best choice for DB backups.

NDMP Tips:

• Avamar NDMP accelerator node should be on the same LAN segment as the filer and the same switch when possible
• No Include/Exclude rules are supported
• Able to run up to 4 NDMP backups simultaneously
• most effective with large files
• min of 4GB of memory per accelerator node per stream
• 4 NDMP simultaneously scheduled as groups backups

Desktop / Laptop

Sizing:

• Number of clients
• Amount of data per client
• user files
• DB/PST files

DS18 can support ~ 5000 clients

Number of streams per node default is 18 (17 are usable, one should be reserved for restores).

That completes the brain dump.  Wish I had more but that is all for now.