Eric Schrock wrote:
On Thu, Jul 06, 2006 at 09:53:32PM +0530, Pramod Batni wrote:
offtopic query :
How can ZFS require more VM address space but not more VM ?
The real problem is VA fragmentation, not consumption. Over time, ZFS's
heavy use of the VM system causes the address space to become
fragmented. Eventually, we will need to grab a 128k block of contiguous
VA, but can't find a contiguous region, despite having plenty of memory
(physical or virtual).
This is only a problem on 32-bit kernels, because on a 64-bit kernel VA
is effectively limitless.
Is that to say eventially there will be no contiguous VA and the system
will become unstable/unresponsive or hang? Or will it clear itself
during periods of low activity?
I'm hoping to use some old 32-bit hardware (dual p3, 1ghz) with a bunch
of drives (6x250 raidz) to provided file storage and some processing in
a home network. I'd rather not have to worry about rebooting. I had >500
days uptime on a previous systembefore a long power outage.
- Eric
--
Eric Schrock, Solaris Kernel Development http://blogs.sun.com/eschrock
_______________________________________________
zfs-discuss mailing list
zfs-discuss@opensolaris.org
http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
_______________________________________________
zfs-discuss mailing list
zfs-discuss@opensolaris.org
http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
