RAM Caching in V5.0

tulsaconnect · Thu Jan 28, 2010 12:32 pm

Ok, so the RAM cache is a FIFO type system. How large of a cache has Starwind been tested with? Does it have any "adaptive" smarts to only cache the most frequently read data?

Constantin (staff) · Thu Jan 28, 2010 12:37 pm

I`m not sure, but maximum cache capacity which we tested with is few gigabytes.
No, it doesn`t for now

nbarsotti · Thu Jan 28, 2010 2:38 pm

When you say "few gigabytes" do you mean only 2-3 GB? Are there any know problems with using more like 10-11 GB?

Constantin (staff) · Thu Jan 28, 2010 2:39 pm

We do not have information about such big cache.

nbarsotti · Thu Jan 28, 2010 4:55 pm

What does the "Cache Block Expiry period in ms" do? My guess would be that it "expires" and flushes a block from cache if it has not been accessed with in a certain number of milliseconds. That seems like a bad idea to flush data simply becuase it has reached a time out. It would make way more sense to keep filling up the cache until it runs out of room then start flushing the oldest data first. FIFO. The default is 5000 ms, should that be set to 0 if you doing want to use a timer based approach?

Constantin (staff) · Fri Jan 29, 2010 9:33 am

Yes, you are right, if timer expires, data will be flashed down to disk if to this block of cache will be no requests.