[nylug-talk] Filesystems that Support Transparent Compression?

[alex@pilosoft.com]

On Tue, 11 Jul 2006, Sunny Dubey wrote:

> Am Dienstag, 11. Juli 2006 18:35 schrieb alex at pilosoft.com:
> > Example: You have 20GB file, compressed into 10G. Now, you mmap'd it, and
> > need to fetch byte #44444444. To do that, you need to uncompress entire
> > file. Now, you modify a byte there. To write that, you need to recompress
> > entire file. Etc.
> 
> That seems wrong.  Knoppix compresses much information and uses some 
> interesting tricks to allow people to 'write' data to the ROM ...  
> 
> I think there is a difference between file-by-file compression, and
> entire FS compression.
> 
> Additionally, (as I suggested a few days ago offline to him) there
> exists great read-only solutions SqashFS if all that XML data is static
> and never changing.  We use it on our live distro, works dandy.
Yes, RO is not a problem at all. RW is a problem.