Scanner caching is in fact pre-fetching. J-D
On Tue, Oct 20, 2009 at 9:44 AM, Ananth T. Sarathy <[email protected]> wrote: > will do. Is there any other property for setting the cache time out? also is > there any way to precache ? > Ananth T Sarathy > > > On Tue, Oct 20, 2009 at 12:27 PM, Jean-Daniel Cryans > <[email protected]>wrote: > >> Well since you are using S3 it's not like adding more nodes adds more >> spindles, you only really distribute the HBase-side processing. Also, >> a count is a sequential operation so it's not distributed (you only >> hit one node at a time). To speed up scans you can increase scanner >> caching. >> >> J-D >> >> On Tue, Oct 20, 2009 at 9:23 AM, Ananth T. Sarathy >> <[email protected]> wrote: >> > So, I have added 3 region servers, and I am not getting any real >> performance >> > increases.. Does anyone have any other tips? I checked the wiki, but we >> are >> > doing what is applicable to us. Is there any way check latency on s3, >> and >> > are the any jobs that could be run to increase performance for things >> like >> > count? (we only have like 27k rows right now, and it's terribly slow, >> which >> > is weird, because it was fast for a while, and suddenly slowed down ) >> > Ananth T Sarathy >> > >> >
