Linux AS 3 swap question!!

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mac a écrit :

> Appreciate your response ..Thanks ..i juts have a couple of queries
>
> 1)i have  a swap partion of 16 GB ...how can i go about decreasing the 
> size of this partition  ie the size of swap
>
With [sc]fdisk or any other partition tool.

> 2)Can both the swap file and partition coexist ??

Yes

>
>
> 3)WHich is a better approcah ..partition or file and which exists 
> after every reboot

Well, a swap partition on a file system means that if this file system 
is broken, swap file will be too. You understand also that the swap file 
is usable only if the file system is mounted.

For me, swap file is to be used if you need to add swap on a system 
where you can't add swap partition

>
> Really appreciate your help here
>
> Thanks
>
> On 2/26/06, * Rick Stevens* <rstevens at vitalstream.com 
> <mailto:rstevens at vitalstream.com>> wrote:
>
>     On Sat, 2006-02-25 at 23:09 +0530, mac wrote:
>     > Hi,
>     > We have a Linux EL AS 3 running on a poweredge server with 8 GB
>     > ram ...we would like to know how to change the swap space on a linux
>     > AS 3 system dynamically
>     >
>     >  and would AS3 support a swap size of 16 GB
>     >
>     > any pointers appreciated
>
>     You can have up to 16 swap sections but each is limited to 2GB each,
>     giving a total of 32GB of swap.  You can't change the swap size
>     dynamically, since the swap is on a fixed-size partition or file.  You
>     can enable and disable various swap files or partitions using the
>     swapon(8) or swapoff(8) commands.
>
>     Swap has to be either a separate partition OR a zero-filled
>     file.  You
>     probably know how to make a swap partition.  To create a swap _file_:
>
>     1. Find a partition that has enough free space for the swap you want.
>
>     2. As root, do:
>
>             # dd if=/dev/zero of=/path/to/swap/file count=size
>
>     For example, to create a 2GB swap file called "/var/swapfile":
>
>             # dd if=/dev/zero of=/var/swapfile count=2G
>
>     3. Convert the file to a swap file:
>
>             # mkswap /var/swapfile
>
>     3. Activate via:
>
>             # swapon /var/swapfile
>
>     4. Edit your /etc/fstab file and add a line for this swap file so
>     it'll
>     activate on the next boot:
>
>             /var/swapfile   swap          swap    defaults        0 0
>
>     Voila!
>
-- 
Daniel