From: Joseph S. Barrera III (email@example.com)
Date: Thu Sep 07 2000 - 09:26:55 PDT
Some questions to think about:
How do you back up a 10 TB disk?
If you forgot where you put something
on a 10 TB disk, how long does it take
to do a grep on the whole thing?
Let's say we're really optimistic
and you can read your 10 TB disk
at 100 MB/s. Then to read the whole
thing, you need
10^7 MB / 10^2 MB/sec = 10^5 sec
10^5 sec / 3600 sec/hr = 27.8 hours
... so it takes more than a day
to do a linear scan of the disk.
If you're grepping, or actually
reading files from a file system,
then it's going to take a lot longer.
Jim Gray has a talk on his website
that goes into more detail about
the challenges of huge disks.
If I have time, I'll track it down.
This archive was generated by hypermail 2b29 : Thu Sep 07 2000 - 16:56:52 PDT