I'm interested in some more detail on how ZFS intent log behaves for
updated done via a memory mapped file - i.e. will the ZIL log updates
done to an mmap'd file or not ?
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On 05/29/2012 03:29 AM, Daniel Carosone wrote:
For the mmap case: does the ARC keep a separate copy, or does the vm
system map the same page into the process's address space? If a
separate copy is made, that seems like a potential source of many
kinds of problems - if it's the same page then
to improve
performance.
--
Iwan Aucamp
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On 05/28/2012 10:12 PM, Andrew Gabriel wrote:
On 05/28/12 20:06, Iwan Aucamp wrote:
I'm thinking of doing the following:
- relocating mmaped (mongo) data to a zfs filesystem with only
metadata cache
- reducing zfs arc cache to 16 GB
Is there any other recommendations - and is above
