On Wed, May 22, 2013 at 10:36 AM, lars hofhansl <[email protected]> wrote: > The 2000-4000 was just glancing at the HMaster page every now and then.
Ah sorry to have focused on that. > The main point I was trying to make is that the only difference is the > number of block cache misses (which is low in the SequentialRead case and > very high in the RandomRead case), and the number of cache misses is almost > the same as the number of a requests. Re-reading your email, it seems we tested different things. In my case, whatever cache I was hitting was the only one I was planning to hit. If I was reading from the OS cache, I was disabling the block cache. > (The cache misses are traced via OpenTSDB). > > I'll repeat my test with a single region server only. Was your test in a > cluster or with a single region server? The whole setup is described in the document. J-D
