So, you mean I shall disable block cache and make all query directly to DFS?
Then, the query latency maybe high. And how much block cache hit ratio is considered to be acceptable? I mean, above such ratio, block cache is benefical. 2011/4/26 Ted Dunning <[email protected]>: > Because of your key organization you are blowing away your cache anyway so > it isn't doing you any good. > > On Mon, Apr 25, 2011 at 7:59 PM, Weihua JIANG <[email protected]>wrote: > >> And we also tried to disable block cache, it seems the performance is >> even a little bit better. And it we use the configuration 6 DN servers >> + 3 RS servers, we can get better throughput at about 1000 >> month_report/second. I am confused. Can any one explain the reason? >> >
