On Sep 4, 2009, at 8:59 PM, Bob Friesenhahn <bfrie...@simple.dallas.tx.us
> wrote:
On Fri, 4 Sep 2009, Ross Walker wrote:
I guess one can find a silver lining in any grey cloud, but for
myself I'd just rather see a more linear approach to writes. Anyway
I have never seen any reads happen during these write flushes.
I have yet to see a read happen during the write flush either. That
impacts my application since it needs to read in order to proceed,
and it does a similar amount of writes as it does reads.
The ARC makes it hard to tell if they are satisfied from cache or
blocked due to writes.
I suppose if you have the hardware to go sync that might be the best
bet. That and limiting the write cache.
Though I have only heard good comments from my ESX admins since moving
the VMs off iSCSI and on to ZFS over NFS, so it can't be that bad.
-Ross
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