General :: Toram Or Not Toram - And The Memory Remains The Same ?
Jan 16, 2010
So I made a neat little fluxbox distro(another one?) actually its the latest incarnation of 503box
Anyway; with Debian Live (which its made from) one of the boot parameters is[url]
Boot in TORAM mode, as you see there above link..Specifically I used
Code:
Which isnt listed but actually works better as it only boots the compressed fs into RAM
Using just "toram" the whole cd/iso,etc is booted into RAM
Anyway; so for some reason the memory usages are about the same no matter whether booting toram
or not?
Heres Proof; using "free"
Environs- at each boot I am booting off 2GB fat32 usb on a Desktop PC.
Heres Debian's default live boot not toram, no persistent (usb mounted)
[url]
so it using about 80MB RAM?
Heres in toram/no persistent mode(no drives mounted...usb/cd removable)
[url]
How that be red?
The squashfs filesystem is 340MB shot into ram so why isnt the mem usage higher?
Heres some more pics- note that all the mem usage is about the same..
At boot it gives message when using toram mode
Code:
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Oct 22, 2010
Have you ever wanted the Ubuntu LiveCD to have a ToRAM feature like knoppix? I know I have. Looking around online, a HOWTO that focuses on this exact topic is [url] . [url] hasn't been updated since Ubuntu 9.10 was released however, and some things it mentions no longer work as it describes (especially things dealing with the bootloader). It also isn't the easiest HOWTO to follow (maybe that's just me) mainly because of the multiple things that need to be mounted and kept track of. This is why I spent a few days developing a script that will take an Ubuntu ISO, and add a ToRAM feature to it. I used [url]and [url]as my two main sources of information so thanks to the authors of both those pages for making this script possible.
What is a ToRAM feature?
A ToRAM feature is something that copies the entire CD to RAM before running the live environment. I first saw this done by knoppix, one of the first linux distributions I've ever tried, and now this can be done with Ubuntu as well.
Why do this?
There are several reasons:
Speed: A LiveCD environment is usually considered to be slower than a regular install of Ubuntu. This is because instead of running from the hard drive, the LiveCD runs right from your CD, and since CDs are slower than hard drives, this results in a slower Ubuntu then you may be used to. A ToRAM feature addresses this issue. This is because when the LiveCD environment runs from your RAM, it is not only faster than a regular hard drive install (due to RAM's insane speeds), it is also faster than any SSD.
Getting your CD Drive back: If you boot into a LiveCD environment from a CD, Ubuntu needs that CD to operate. If you have a single CD drive (like most of us do), you can no longer use that drive. If this is a problem for you, the ToRAM feature addresses this as well since it doesn't need the Ubuntu CD to operate, allowing you to remove it and replaces it with any other CD.
Fast Install: Although Ubuntu's install process is fast, it can still take a while before it finishes. If you install Ubuntu often, and don't have the patience to wait for it to finish every time, you can speed up the process by using the ToRAM feature. As an added bonus, if you are installing Ubuntu on many machines at once (like in a library or a computer room), the ToRAM feature allows you to do this in parallel since you won't need the CD for 99% of the installation (only to start it).
What will this work on?
This should work for Ubuntu 10.10 x86 or amd64, but keep in mind:
Quote:
Originally Posted by [url]
The architecture (Amd64 or i386) to be stored on the LiveCD should be the same as the architecture used to perform the customization, or the LiveCD may not run. It is not trivial to customize an AMD64 LiveCD using an i386 operating system, for example.
Word of Warning
Although I try to build safeguards into any script I upload to the internet to keep them from doing anything unexpected, including this one, you may want to run this script in a VM where it's safe. You could also try running it from a live CD where, if it goes rouge for some reason, it won't kill anything.
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Aug 18, 2011
I've just created a bootdisk (ssd) with multiples Squasfs images I can choose to boot at the Grub2 menu.No I tried to put the sqfs-images into a ramdisk. Therefore I edited the script '/usr/share/initramfstools/ scripts/ casper'. I used the 'dirty hacks'in the ubuntuforums.org/boottoram howto but I suited them for my needs.Now the Systems stops after the kernel and doesn't find a root system.
The sqfs-image without the modification of the 'casper'-script still boots but doesn't load into ram completely.
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Jun 26, 2010
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May 31, 2011
No matter what I do, the SWAP usage remains zero all the time. Is there anything I am missing? In the following case (see attached screenshot) I am running make on the kernel that I downloaded. The CPU usage is understandable. But what is the use of Swap when its never used. [URL]. I am on Kubuntu natty. My partitions are as follows:
Kamesh@Galaxy:~$ sudo fdisk -l
[sudo] password for:
Disk /dev/sda: 160.0 GB, 160041885696 bytes
255 heads, 63 sectors/track, 19457 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x88fa88fa
Device Boot Start End Blocks Id System
/dev/sda1 * 1 9615 77232456 7 HPFS/NTFS
/dev/sda2 9616 19458 79056897 5 Extended
/dev/sda5 9616 18960 75057152 83 Linux
/dev/sda6 18960 19458 3998720 82 Linux swap / Solaris
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I think I'm missing something about a very simple config that doesn't work ...
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Code:
The guset has nfs-common and portmap installed. Network and mapping is ok, ssh to 192.168.56.1 (host internal IP) from guest to host is ok
When I try a
Code:
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Dec 20, 2010
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Mar 25, 2010
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Feb 7, 2011
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[Code].....
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Code:
Weird behaviour I should mention is that when I check for NULL pointer in node->child[index], the unassigned values are not null anymore, they point to arbitary memory.
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