[CentOS] OT: Caching synchronous writes
Ray Van Dolson
rayvd at bludgeon.org
Fri Apr 23 00:10:37 UTC 2010
On Thu, Apr 22, 2010 at 03:50:11PM -0700, John R Pierce wrote:
> Ray Van Dolson wrote:
> >> I think what you want is a proper storage array with mirrored write
> >> cache.
> > Which is what we have with ZFS + SSD-based ZIL for far less money than
> > a NetApp.
> not unless you have a pair of them configured as an active/standby HA
> cluster, sharing dual port disk storage, and some how (magic?) mirroring
> the cache pool so that if the active storage controller/server fails,
> the standby can take over wthout losing a single write.
This is definitely tangental to what I was originally asking. :)
I'm not suggesting this perfectly replaces (or even comes close) a
clustered NetApp setup. But it can provide similiar NFS write
performance and I can buy three of them and replicate data for DR needs
for far less than the price of a NetApp SnapMirror setup.
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