On Thu, Jul 26, 2012 at 1:52 PM, Minh Duc Nguyen <mdngu...@gmail.com> wrote:
> Mohit, > > According to HBase: The Definitive Guide, > > The row+column Bloom filter is useful when you cannot batch updates for a > specific row, and end up with store files which all contain parts of the > row. The more specific row+column filter can then identify which of the > files contain the data you are requesting. Obviously, if you always load > the entire row, this filter is once again hardly useful, as the region > server will need to load the matching block out of each file anyway. Since > the row+column filter will require more storage, you need to do the math to > determine whether it is worth the extra resources. > Thanks! I have a timeseries data so I am thinking I should enable bloom filters for only rows > > > ~ Minh > > On Thu, Jul 26, 2012 at 4:30 PM, Mohit Anchlia <mohitanch...@gmail.com > >wrote: > > > Is it advisable to enable bloom filters on the column family? > > > > Also, why is it called global kill switch? > > > > Bloom Filter Configuration > > 2.9.1. io.hfile.bloom.enabled global kill switch > > > > io.hfile.bloom.enabled in Configuration serves as the kill switch in case > > something goes wrong. Default = true. > > >
