Originally posted by dev_mohamed
i mean that i see many hosting company give plans start from 1GB or 2GB that mean if they have a server with 120GB they will sale for about 100 client only so my question is that is there a new file system like ext3 or other that can format a 120GB harddesk to be 256GB for example or something like this.
firstly, yahoo and google don't use 120GB hard disks
they may have some san storage with hundreds of TB.
Anyway, for the sake of argument there are filesystems that do transparent compression. That way, you don't see a 120GB disk
as 256GB. You see it as a 120GB disk but because files are compressed you can have more data than 120GB.
The first drawback is that they have a perfomance hit since all read/write operations use much cpu time for the (de)compression.
The second drawback is that the compression depends on the data (as always). If you have a news server with many tiny
text data then you have high compression. If you have divx movies or mp3 then you have almost no compression.
I don't know what was the meaning of your question, but i hope i helped.