Thats good numbers!
You wont get per volume cache hits/etc, its a system wide pool..but you can use 'priority' to say that PER volume, you want it sticky (keep) neutral (reuse) or never (never) to store those vol blocks in cache.
Cache is always random IO, sequential IO is kept on disk..plenty fast from there and doesn't pollute the flash cache.
Your next step is a chart showing the cache hit types. Level0, metadata, directory...etc.
:)
Good stuff you're showing there.
On Mon, May 14, 2012 at 12:56 PM, Fletcher Cocquyt fcocquyt@stanford.eduwrote:
We setup a custom view in NMC to show us the hit % and Disk Reads replaced per the Flash Cache Best Practices doc TR-3832. Is it possible to get more granular information about what is being cached?
These are NFS data stores and one of the volumes is 500Gb of web content. So the web team would be very interested to know the net benefit to them - eg how much are the apache instances benefitting. We also have oracle instances, VMware volumes and would like per volume stats if possible
I guess I am looking for the ability to apply the custom view to different vFilers and see per volume hits and hit %, Disk Reads replaced
We have the 1Tb card installed and see the Disk Reads Replaced topping out around 5000 - with one spike up to ~8500 Does this look like what others are seeing in a mixed workload environment like I described?
thanks, Fletcher
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