Re: 20TB Storage System (fsck????)
From: Petri Helenius (pete_at_he.iki.fi)
Date: 09/03/03
- Previous message: Eric Anderson: "Re: 20TB Storage System (fsck????)"
- In reply to: Max Clark: "RE: 20TB Storage System (fsck????)"
- Next in thread: Chuck Swiger: "Re: 20TB Storage System (fsck????)"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
Date: Wed, 03 Sep 2003 21:22:59 +0300 To: Max Clark <max.clark@media.net>
Max Clark wrote:
>Ohh, that's an interesting snag. I was under the impression that 5.x w/ PAE
>could address more than 4GB of Ram.
>
>
It does. However as long as a pointer is 32 bits, your address space for
a process
is maxed out at 4G which translates to about 2.5G user after kernel and
other
things have taken their toll.
>If fsck requires 700K for each 1GB of Disk, we are talking about 7GB of Ram
>for 10TB of disk. Is this correct? Will PAE not function correctly to give
>me 8GB of Ram? To check 10TB of disk?
>
PAE functions correctly but does not provide for 7G address space.
>Is there anyway to bypass this requirement and split fsck into smaller
>chunks? Being able to fsck my disk is kinda important.
>
>
Yes, you do that by splitting up the filesystem to smaller filesystems.
Kind of obvious?
>I have zero experience with either itanium or opteron. What is the current
>status of support for these processors in FreeBSD? What would the preferred
>CPU be? Will there be PCI cards that I would not be able to use in either of
>these systems?
>
>
I´m personally biased towards the Opteron, but that´s more based on that
it makes
more sense than their technical merits so far (because neither has too
much).
Both CPU´s should work fine with 5.2 according to the TODO list.
Meanwhile I suggest
you play with the number of inodes on the 10TB filesystem and see how
that affects
the memory usage.
Pete
_______________________________________________
freebsd-performance@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/freebsd-performance
To unsubscribe, send any mail to "freebsd-performance-unsubscribe@freebsd.org"
- Previous message: Eric Anderson: "Re: 20TB Storage System (fsck????)"
- In reply to: Max Clark: "RE: 20TB Storage System (fsck????)"
- Next in thread: Chuck Swiger: "Re: 20TB Storage System (fsck????)"
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
Relevant Pages
|
|
