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Re:How do I backup a XEN VM block device (1 viewing) (1) Guest
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TOPIC: Re:How do I backup a XEN VM block device
#7
Paul (User)
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How do I backup a XEN VM block device 1 Year, 9 Months ago Karma: 0  
What is the most reliable way to back up a XEN VM that is based on a block device? In this environment there is only one XEN server, there is no SAN however there is well over 500GB free space with room to grow. For reliability all OES2 VMs are block devices.

I have tried dd but this seems to take quite a while, especially considering the VMs have to be down to do it so all data is flushed to disk. Is there a faster technique that is as reliable? I will only be backing up /boot and / less parts of /var as this folder is most likely to be holding user data and mounted on a seperate block device, in this instance 60Gb for iFolder mounted at /var/simias.

My current thoughts are that I would back up the results of the block device backup once a week to tape. The volumes backing user data and /var/simias would be backed up in the normal tape backup regime and I would probably also include /var/opt/novell.

There is a Windows 2003 Terminal Server, this is entirely backed up to tape but I think it might be remiss not to back up the VM file as well. Tapes are 200GB native and this would be part of the weekly VM device backup, on the weekend I think.

There seems to be enough doco on backing up file backed VMs but very little on block attached VMs.

Any suggestions are most welcome.

Thanks, Paul.
 
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#8
Hevary (User)
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Re:How do I backup a XEN VM block device 1 Year, 9 Months ago Karma: 0  
Hi Paul

I used dd and netcat, I was able to copy one of the virtual machine (sles) which was about 7 G in about 14 mins over the network.

I had computer A and I have virutal server running in the LVM partition and turn off the virtula server and and I used dd and netcat to copy that virtual server over the network (I will prepare this documentation soon) to Maxtor (external US or to another machine with crossover cable or even do it over network it should be ok.

I did the test and works for the sles 10 sp1 it was about 7 GB and it took me about 14 mins and I went to test the backed up partition and I tested on different machine and I did virutalization with
that partition backed up and I told the dom 0 to use this partition and it boots up from this external USB and I worked fine.

please before we do anything I need to prepare proper documentations and you should first test it not in working environment, I need to test the window virtual server and make sure I am satisfied with and then I will let you know about the outcome, thanks mate.

Sarhang Hevary,
 
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Last Edit: 2008/06/20 23:12 By Hevary.
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flyfish (User)
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Re:How do I backup a XEN VM block device 8 Months, 3 Weeks ago Karma: 0  
Memory Lane Isn't What It Used to Be
About this time every year,I get very nostalgic.Walking through my neighorhooon a fall afternoon reminds me of a time not too long ago when sounds of children filled the air,children playing games on a hill,and throwing leaves around in the street below,I was one of those children,carefree and happy.I live on a street that is only one block long.I have lived on the same street for sixteen years.I love my street.One side has six houses on it,and the other has only two houses,with a small hill in the middle and a huge cottonwood tree on one end.When I think of home,I think of my street,only I see it as it was before.Unfortunately,things change.One day,not long ago,I looked around and saw how different everything has become.Life on my street will never be the same because neighbors are quickly growing old,friends are growing up and leaving,and the city is planning to destroy my precious hill and sell the property to contractors. (wow power leveling,)

It is hard for me to accept that many of my wonderful neighbors are growing old and won't be around much longer.I have fond memories of the couple across the street,who sat together on their porch swing almost every evening,the widow next door who yelled at my brother and me for being too loud,and the crazy old man in a black suit who drove an old car.In contrast to those people,the people I see today are very old neighbors who have seen better days.The man in the black suit says he wants to die,and another neighbor just sold his house and moved into a nursing home.The lady who used to yell at us is too tired to bother anymore,and the couple across the street rarely go out to their front porch these days.It is dufficult to watch these precious people as they near the end of their lives because at one time I thought they would live forever. (wow gold,)

The "comings and goings" of the younger generation of my street are now mostly "goings" as friends and peers move on.Once upon a time,my life and the lives of my peers revolved aroung home.The boundary of our world was the gutter at the end of the street. (world of warcraft power leveling,) We got pleasure from playing night games,or from a breathtaking ride on a tricycle.Things are different now,as my friends become adults and move on.Children who rode tricycles now drive cars.The kids who once played with me now have new interests and values as they go their separate ways.Some have gone away to college,a few got married,two went into the army,and one went to prison.Watching all these people grow up and go away only makes me long for the good old days.

Perhaps the biggest change on my street is the fact that the city is going to turn my precious hill into several lots for new homes.For sixteen years,the view out of my kitchen window has been a view of that hill.The hill was a fundamental part of my childhood life; it was the hub of social activity for the children of my street.We spent hours there building forts,sledding,and playing tag.The view out my kitchen window now is very different; it is one of tractors and dump trucks tearing up the hill.When the hill goes,the neighborhood will not be the same.It is a piece of my childhood.It is a visual reminder of being a kid. Without the hill,my street will just another pea in the pod. (world of warcraft gold,)

There was a time when my street was my world,and I thought my world would never change.But something happened. People grow up,and people grow old.Places change,and with the change comes the heartache of knowing I can never go back to the times I loved.In a year or so, I will be gone just like many of my neighbors. I will always look back to my years as a child,but the place I remember will not be the silent street whose peace is interrupted by the sounds of construction.It will be the happy ,noisy,somewhat strange,but wonderfull street I knew as a child.
 
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#23
ginny (User)
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Re:How do I backup a XEN VM block device 3 Days, 4 Hours ago Karma: 0  
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